Merge remote-tracking branch 'origin/5.12' into 5.12.1

 Conflicts:
	src/widgets/kernel/qtooltip.cpp

Change-Id: Ic2f9a425359050eb56b3a4e5162cf5e3447058c8

77 files changed, 1425 insertions, 894 deletions

diff --git a/src/corelib/codecs/codecs.pri b/src/corelib/codecs/codecs.pri
index f1bbde1d69..5d500ce521 100644
--- a/src/corelib/codecs/codecs.pri
+++ b/src/corelib/codecs/codecs.pri
@@ -56,8 +56,7 @@ qtConfig(textcodec) {
         qtConfig(iconv) {
             HEADERS += codecs/qiconvcodec_p.h
             SOURCES += codecs/qiconvcodec.cpp
-            qtConfig(gnu-libiconv): \
-                QMAKE_USE_PRIVATE += iconv
+            QMAKE_USE_PRIVATE += iconv
         }
 
         win32 {
diff --git a/src/corelib/codecs/codecs.qdoc b/src/corelib/codecs/codecs.qdoc
index 9364b7a989..ec9b8185e2 100644
--- a/src/corelib/codecs/codecs.qdoc
+++ b/src/corelib/codecs/codecs.qdoc
@@ -276,13 +276,11 @@
 
     TSCII, formally the Tamil Standard Code Information Interchange
     specification, is a commonly used charset for Tamils. The
-    official page for the standard is at
-    \l{http://www.tamil.net/tscii/}
+    official page for the standard is \l{Information Technology in Tamil}
 
-    This codec uses the mapping table found at
-    \l{http://www.geocities.com/Athens/5180/tsciiset.html}.
     Tamil uses composed Unicode which might cause some
     problems if you are using Unicode fonts instead of TSCII fonts.
+    A Tamil codepage layout can be found on \l {Tamil Script Code}.
 
     Most of the code was written by Hans Petter Bieker and is
     included in Qt with the author's permission and the grateful
diff --git a/src/corelib/codecs/qwindowscodec.cpp b/src/corelib/codecs/qwindowscodec.cpp
index 37e1183fb6..710935a65a 100644
--- a/src/corelib/codecs/qwindowscodec.cpp
+++ b/src/corelib/codecs/qwindowscodec.cpp
@@ -183,7 +183,7 @@ QString QWindowsLocalCodec::convertToUnicodeCharByChar(const char *chars, int le
 #else
     QString s;
     size_t size = mbstowcs(NULL, mb, length);
-    if (size < 0) {
+    if (size == size_t(-1)) {
         Q_ASSERT("Error in CE TextCodec");
         return QString();
     }
diff --git a/src/corelib/configure.json b/src/corelib/configure.json
index 183eb3a13e..a22a7459bd 100644
--- a/src/corelib/configure.json
+++ b/src/corelib/configure.json
@@ -24,9 +24,9 @@
         "doubleconversion": {
             "label": "DoubleConversion",
             "test": {
-                "include": "double-conversion/double-conversion.h",
                 "main": "(void) double_conversion::StringToDoubleConverter::NO_FLAGS;"
             },
+            "headers": "double-conversion/double-conversion.h",
             "sources": [
                 "-ldouble-conversion"
             ]
@@ -35,7 +35,6 @@
             "label": "GLib",
             "test": {
                 "head": "typedef struct _GMainContext GMainContext;",
-                "include": "glib.h",
                 "main": [
                     "g_thread_init(NULL);",
                     "(void) g_main_context_default();",
@@ -43,22 +42,60 @@
                     "g_source_add_poll(NULL, NULL);"
                 ]
             },
+            "headers": "glib.h",
             "sources": [
                 { "type": "pkgConfig", "args": "glib-2.0 gthread-2.0" }
             ]
         },
+        "posix_iconv": {
+            "label": "POSIX iconv",
+            "export": "iconv",
+            "test": {
+                "main": [
+                    "iconv_t x = iconv_open(\"\", \"\");",
+                    "char *inp, *outp;",
+                    "size_t inbytes, outbytes;",
+                    "iconv(x, &inp, &inbytes, &outp, &outbytes);",
+                    "iconv_close(x);"
+                ]
+            },
+            "headers": "iconv.h",
+            "sources": [
+                { "libs": "-liconv", "condition": "config.openbsd || config.haiku" },
+                { "libs": "", "condition": "!(config.openbsd || config.haiku)" }
+            ]
+        },
         "gnu_iconv": {
             "label": "GNU libiconv",
             "export": "iconv",
-            "test": "gnu-libiconv",
+            "test": {
+                "main": [
+                    "iconv_t x = iconv_open(\"\", \"\");",
+                    "const char *inp;",
+                    "char *outp;",
+                    "size_t inbytes, outbytes;",
+                    "iconv(x, &inp, &inbytes, &outp, &outbytes);",
+                    "iconv_close(x);"
+                ]
+            },
+            "headers": "iconv.h",
             "sources": [
                 "-liconv"
             ]
         },
+        "sun_iconv": {
+            "label": "SUN libiconv",
+            "export": "iconv",
+            "test": {
+                "inherit": "gnu_iconv"
+            },
+            "sources": [
+                ""
+            ]
+        },
         "icu": {
             "label": "ICU",
             "test": {
-                "include": [ "unicode/utypes.h", "unicode/ucol.h", "unicode/ustring.h" ],
                 "main": [
                     "UErrorCode status = U_ZERO_ERROR;",
                     "UCollator *collator = ucol_open(\"ru_RU\", &status);",
@@ -66,6 +103,7 @@
                     "    ucol_close(collator);"
                 ]
             },
+            "headers": [ "unicode/utypes.h", "unicode/ucol.h", "unicode/ustring.h" ],
             "sources": [
                 {
                     "builds": {
@@ -84,9 +122,9 @@
         "journald": {
             "label": "journald",
             "test": {
-                "include": [ "systemd/sd-journal.h", "syslog.h" ],
                 "main": "sd_journal_send(\"PRIORITY=%i\", LOG_INFO, NULL);"
             },
+            "headers": [ "systemd/sd-journal.h", "syslog.h" ],
             "sources": [
                 { "type": "pkgConfig", "args": "libsystemd" },
                 { "type": "pkgConfig", "args": "libsystemd-journal" }
@@ -95,7 +133,6 @@
         "libatomic": {
             "label": "64 bit atomics",
             "test": {
-                "include": [ "atomic", "cstdint" ],
                 "tail": [
                     "void test(volatile std::atomic<std::int64_t> &a)",
                     "{",
@@ -114,6 +151,7 @@
                 ],
                 "qmake": "CONFIG += c++11"
             },
+            "headers": [ "atomic", "cstdint" ],
             "sources": [
                 "",
                 "-latomic"
@@ -122,13 +160,13 @@
         "libdl": {
             "label": "dlopen()",
             "test": {
-                "include": "dlfcn.h",
                 "main": [
                     "dlclose(dlopen(0, 0));",
                     "dlsym(RTLD_DEFAULT, 0);",
                     "dlerror();"
                 ]
             },
+            "headers": "dlfcn.h",
             "sources": [
                 "",
                 "-ldl"
@@ -137,9 +175,9 @@
         "librt": {
             "label": "clock_gettime()",
             "test": {
-                "include": [ "unistd.h", "time.h" ],
                 "main": "timespec ts; clock_gettime(CLOCK_REALTIME, &ts);"
             },
+            "headers": [ "unistd.h", "time.h" ],
             "sources": [
                 "",
                 "-lrt"
@@ -148,9 +186,9 @@
         "lttng-ust": {
             "label": "lttng-ust",
             "test": {
-                "include": "lttng/ust-events.h",
                 "main": "lttng_session_destroy(nullptr);"
             },
+            "headers": "lttng/ust-events.h",
             "sources": [
                 { "type": "pkgConfig", "args": "lttng-ust" },
                 "-llttng-ust"
@@ -161,13 +199,13 @@
             "label": "PCRE2",
             "test": {
                 "head": "#define PCRE2_CODE_UNIT_WIDTH 16",
-                "include": "pcre2.h",
                 "tail": [
                     "#if (PCRE2_MAJOR < 10) || ((PCRE2_MAJOR == 10) && (PCRE2_MINOR < 20))",
                     "#  error This PCRE version is not supported",
                     "#endif"
                 ]
             },
+            "headers": "pcre2.h",
             "sources": [
                 { "type": "pkgConfig", "args": "libpcre2-16" },
                 "-lpcre2-16"
@@ -176,12 +214,12 @@
         "pps": {
             "label": "PPS",
             "test": {
-                "include": "sys/pps.h",
                 "main": [
                     "pps_decoder_t decoder;",
                     "pps_decoder_initialize(&decoder, NULL);"
                 ]
             },
+            "headers": "sys/pps.h",
             "sources": [
                 "-lpps"
             ]
@@ -189,10 +227,10 @@
         "slog2": {
             "label": "slog2",
             "test": {
-                "include": "sys/slog2.h",
                 "main": "slog2_set_default_buffer((slog2_buffer_t)-1);"
             },
             "export": "",
+            "headers": "sys/slog2.h",
             "sources": [
                 "-lslog2"
             ]
@@ -277,7 +315,10 @@
         "cxx11_random": {
             "label": "C++11 <random>",
             "type": "compile",
-            "test": "unix/cxx11_random"
+            "test": {
+                "include": "random",
+                "main": "std::mt19937 mt(0);"
+            }
         },
         "eventfd": {
             "label": "eventfd",
@@ -295,32 +336,43 @@
         "futimens": {
             "label": "futimens()",
             "type": "compile",
-            "test": "unix/futimens"
+            "test": {
+                "include": "sys/stat.h",
+                "main": "futimens(-1, 0);",
+                "qmake": [
+                    "# Block futimens() on Apple platforms unless it's available on ALL",
+                    "# deployment targets. This simplifies the logic at the call site",
+                    "# dramatically, as it isn't strictly needed compared to futimes().",
+                    "darwin: QMAKE_CXXFLAGS += -Werror=unguarded-availability"
+                ]
+            }
         },
         "futimes": {
             "label": "futimes()",
             "type": "compile",
-            "test": "unix/futimes"
+            "test": {
+                "include": "sys/time.h",
+                "main": "futimes(-1, 0);"
+            }
         },
         "getauxval": {
             "label": "getauxval()",
             "type": "compile",
-            "test": "unix/getauxval"
+            "test": {
+                "include": "sys/auxv.h",
+                "main": "(void) getauxval(AT_NULL);"
+            }
         },
         "getentropy": {
             "label": "getentropy()",
             "type": "compile",
-            "test": "unix/getentropy"
-        },
-        "posix-iconv": {
-            "label": "POSIX iconv",
-            "type": "compile",
-            "test": "iconv"
-        },
-        "sun-iconv": {
-            "label": "SUN libiconv",
-            "type": "compile",
-            "test": "sun-libiconv"
+            "test": {
+                "include": "unistd.h",
+                "main": [
+                    "char buf[32];",
+                    "(void) getentropy(buf, sizeof(buf));"
+                ]
+            }
         },
         "inotify": {
             "label": "inotify",
@@ -443,7 +495,38 @@
         "xlocalescanprint": {
             "label": "xlocale.h (or equivalents)",
             "type": "compile",
-            "test": "xlocalescanprint"
+            "test": {
+                "files": {
+                    "qglobal.h": [
+                        "#ifndef QGLOBAL_H",
+                        "#define QGLOBAL_H",
+                        "#endif"
+                    ]
+                },
+                "tail": [
+                    "#define QT_BEGIN_NAMESPACE",
+                    "#define QT_END_NAMESPACE",
+                    "",
+                    "#ifdef _MSVC_VER",
+                    "#define Q_CC_MSVC _MSVC_VER",
+                    "#endif",
+                    "",
+                    "#define QT_NO_DOUBLECONVERSION",
+                    "",
+                    "#include QDSP_P_H"
+                ],
+                "main": [
+                    "#ifdef _MSVC_VER",
+                    "_locale_t invalidLocale = NULL;",
+                    "#else",
+                    "locale_t invalidLocale = NULL;",
+                    "#endif",
+                    "double a = 3.4;",
+                    "qDoubleSnprintf(argv[0], 1, invalidLocale, \"invalid format\", a);",
+                    "qDoubleSscanf(argv[0], invalidLocale, \"invalid format\", &a, &argc);"
+                ],
+                "qmake": "DEFINES += QDSP_P_H=$$shell_quote(\\\"@PWD@/tools/qdoublescanprint_p.h\\\")"
+            }
         }
     },
 
@@ -521,14 +604,14 @@
             "label": "POSIX iconv",
             "enable": "input.iconv == 'posix'",
             "disable": "input.iconv == 'sun' || input.iconv == 'gnu' || input.iconv == 'no'",
-            "condition": "!config.win32 && !config.qnx && !config.android && !config.darwin && tests.posix-iconv",
+            "condition": "!config.win32 && !config.qnx && !config.android && !config.darwin && libs.posix_iconv",
             "output": [ "privateFeature" ]
         },
         "sun-libiconv": {
             "label": "SUN iconv",
             "enable": "input.iconv == 'sun'",
             "disable": "input.iconv == 'posix' || input.iconv == 'gnu' || input.iconv == 'no'",
-            "condition": "!config.win32 && !config.qnx && !config.android && !config.darwin && !features.posix-libiconv && tests.sun-iconv"
+            "condition": "!config.win32 && !config.qnx && !config.android && !config.darwin && !features.posix-libiconv && libs.sun_iconv"
         },
         "gnu-libiconv": {
             "label": "GNU iconv",
diff --git a/src/corelib/doc/snippets/code/src_corelib_animation_qparallelanimationgroup.cpp b/src/corelib/doc/snippets/code/src_corelib_animation_qparallelanimationgroup.cpp
index 3fc53bc58b..472c5d41c4 100644
--- a/src/corelib/doc/snippets/code/src_corelib_animation_qparallelanimationgroup.cpp
+++ b/src/corelib/doc/snippets/code/src_corelib_animation_qparallelanimationgroup.cpp
@@ -3,9 +3,9 @@
 ** Copyright (C) 2018 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtCore module of the Qt Toolkit.
+** This file is part of the documentation of the Qt Toolkit.
 **
-** $QT_BEGIN_LICENSE:LGPL$
+** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
@@ -14,24 +14,35 @@
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 3 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL3 included in the
-** packaging of this file. Please review the following information to
-** ensure the GNU Lesser General Public License version 3 requirements
-** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 2.0 or (at your option) the GNU General
-** Public license version 3 or any later version approved by the KDE Free
-** Qt Foundation. The licenses are as published by the Free Software
-** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-2.0.html and
-** https://www.gnu.org/licenses/gpl-3.0.html.
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
diff --git a/src/corelib/doc/snippets/code/src_corelib_animation_qpropertyanimation.cpp b/src/corelib/doc/snippets/code/src_corelib_animation_qpropertyanimation.cpp
index a6dbd909d7..7bd8121b90 100644
--- a/src/corelib/doc/snippets/code/src_corelib_animation_qpropertyanimation.cpp
+++ b/src/corelib/doc/snippets/code/src_corelib_animation_qpropertyanimation.cpp
@@ -3,9 +3,9 @@
 ** Copyright (C) 2018 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtCore module of the Qt Toolkit.
+** This file is part of the documentation of the Qt Toolkit.
 **
-** $QT_BEGIN_LICENSE:LGPL$
+** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
@@ -14,24 +14,35 @@
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 3 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL3 included in the
-** packaging of this file. Please review the following information to
-** ensure the GNU Lesser General Public License version 3 requirements
-** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 2.0 or (at your option) the GNU General
-** Public license version 3 or any later version approved by the KDE Free
-** Qt Foundation. The licenses are as published by the Free Software
-** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-2.0.html and
-** https://www.gnu.org/licenses/gpl-3.0.html.
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
diff --git a/src/corelib/doc/snippets/code/src_corelib_animation_qsequentialanimationgroup.cpp b/src/corelib/doc/snippets/code/src_corelib_animation_qsequentialanimationgroup.cpp
index 1f1363f127..0eff184926 100644
--- a/src/corelib/doc/snippets/code/src_corelib_animation_qsequentialanimationgroup.cpp
+++ b/src/corelib/doc/snippets/code/src_corelib_animation_qsequentialanimationgroup.cpp
@@ -3,9 +3,9 @@
 ** Copyright (C) 2018 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtCore module of the Qt Toolkit.
+** This file is part of the documentation of the Qt Toolkit.
 **
-** $QT_BEGIN_LICENSE:LGPL$
+** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
@@ -14,24 +14,35 @@
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 3 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL3 included in the
-** packaging of this file. Please review the following information to
-** ensure the GNU Lesser General Public License version 3 requirements
-** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 2.0 or (at your option) the GNU General
-** Public license version 3 or any later version approved by the KDE Free
-** Qt Foundation. The licenses are as published by the Free Software
-** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-2.0.html and
-** https://www.gnu.org/licenses/gpl-3.0.html.
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
diff --git a/src/corelib/doc/snippets/code/src_corelib_animation_qvariantanimation.cpp b/src/corelib/doc/snippets/code/src_corelib_animation_qvariantanimation.cpp
index b462ff2d6a..0808dcc145 100644
--- a/src/corelib/doc/snippets/code/src_corelib_animation_qvariantanimation.cpp
+++ b/src/corelib/doc/snippets/code/src_corelib_animation_qvariantanimation.cpp
@@ -3,9 +3,9 @@
 ** Copyright (C) 2018 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtCore module of the Qt Toolkit.
+** This file is part of the documentation of the Qt Toolkit.
 **
-** $QT_BEGIN_LICENSE:LGPL$
+** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
@@ -14,24 +14,35 @@
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 3 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL3 included in the
-** packaging of this file. Please review the following information to
-** ensure the GNU Lesser General Public License version 3 requirements
-** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 2.0 or (at your option) the GNU General
-** Public license version 3 or any later version approved by the KDE Free
-** Qt Foundation. The licenses are as published by the Free Software
-** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-2.0.html and
-** https://www.gnu.org/licenses/gpl-3.0.html.
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
diff --git a/src/corelib/doc/snippets/code/src_corelib_global_qglobal.cpp b/src/corelib/doc/snippets/code/src_corelib_global_qglobal.cpp
index 0248640369..03904659f5 100644
--- a/src/corelib/doc/snippets/code/src_corelib_global_qglobal.cpp
+++ b/src/corelib/doc/snippets/code/src_corelib_global_qglobal.cpp
@@ -279,21 +279,23 @@ const TInputType &myMin(const TInputType &value1, const TInputType &value2)
 void myMessageOutput(QtMsgType type, const QMessageLogContext &context, const QString &msg)
 {
     QByteArray localMsg = msg.toLocal8Bit();
+    const char *file = context.file ? context.file : "";
+    const char *function = context.function ? context.function : "";
     switch (type) {
     case QtDebugMsg:
-        fprintf(stderr, "Debug: %s (%s:%u, %s)\n", localMsg.constData(), context.file, context.line, context.function);
+        fprintf(stderr, "Debug: %s (%s:%u, %s)\n", localMsg.constData(), file, context.line, function);
         break;
     case QtInfoMsg:
-        fprintf(stderr, "Info: %s (%s:%u, %s)\n", localMsg.constData(), context.file, context.line, context.function);
+        fprintf(stderr, "Info: %s (%s:%u, %s)\n", localMsg.constData(), file, context.line, function);
         break;
     case QtWarningMsg:
-        fprintf(stderr, "Warning: %s (%s:%u, %s)\n", localMsg.constData(), context.file, context.line, context.function);
+        fprintf(stderr, "Warning: %s (%s:%u, %s)\n", localMsg.constData(), file, context.line, function);
         break;
     case QtCriticalMsg:
-        fprintf(stderr, "Critical: %s (%s:%u, %s)\n", localMsg.constData(), context.file, context.line, context.function);
+        fprintf(stderr, "Critical: %s (%s:%u, %s)\n", localMsg.constData(), file, context.line, function);
         break;
     case QtFatalMsg:
-        fprintf(stderr, "Fatal: %s (%s:%u, %s)\n", localMsg.constData(), context.file, context.line, context.function);
+        fprintf(stderr, "Fatal: %s (%s:%u, %s)\n", localMsg.constData(), file, context.line, function);
         break;
     }
 }
diff --git a/src/corelib/doc/snippets/code/src_corelib_global_qlogging.cpp b/src/corelib/doc/snippets/code/src_corelib_global_qlogging.cpp
index 7b0b357cff..7589050bc2 100644
--- a/src/corelib/doc/snippets/code/src_corelib_global_qlogging.cpp
+++ b/src/corelib/doc/snippets/code/src_corelib_global_qlogging.cpp
@@ -3,9 +3,9 @@
 ** Copyright (C) 2018 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtCore module of the Qt Toolkit.
+** This file is part of the documentation of the Qt Toolkit.
 **
-** $QT_BEGIN_LICENSE:LGPL$
+** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
@@ -14,24 +14,35 @@
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 3 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL3 included in the
-** packaging of this file. Please review the following information to
-** ensure the GNU Lesser General Public License version 3 requirements
-** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 2.0 or (at your option) the GNU General
-** Public license version 3 or any later version approved by the KDE Free
-** Qt Foundation. The licenses are as published by the Free Software
-** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-2.0.html and
-** https://www.gnu.org/licenses/gpl-3.0.html.
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
diff --git a/src/corelib/doc/snippets/code/src_corelib_global_qnumeric.cpp b/src/corelib/doc/snippets/code/src_corelib_global_qnumeric.cpp
index 5d64070b1b..d281089041 100644
--- a/src/corelib/doc/snippets/code/src_corelib_global_qnumeric.cpp
+++ b/src/corelib/doc/snippets/code/src_corelib_global_qnumeric.cpp
@@ -3,9 +3,9 @@
 ** Copyright (C) 2018 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtCore module of the Qt Toolkit.
+** This file is part of the documentation of the Qt Toolkit.
 **
-** $QT_BEGIN_LICENSE:LGPL$
+** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
@@ -14,24 +14,35 @@
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 3 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL3 included in the
-** packaging of this file. Please review the following information to
-** ensure the GNU Lesser General Public License version 3 requirements
-** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 2.0 or (at your option) the GNU General
-** Public license version 3 or any later version approved by the KDE Free
-** Qt Foundation. The licenses are as published by the Free Software
-** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-2.0.html and
-** https://www.gnu.org/licenses/gpl-3.0.html.
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
diff --git a/src/corelib/doc/snippets/code/src_corelib_global_qoperatingsystemversion.cpp b/src/corelib/doc/snippets/code/src_corelib_global_qoperatingsystemversion.cpp
index d9e927c55a..c712dfa432 100644
--- a/src/corelib/doc/snippets/code/src_corelib_global_qoperatingsystemversion.cpp
+++ b/src/corelib/doc/snippets/code/src_corelib_global_qoperatingsystemversion.cpp
@@ -3,9 +3,9 @@
 ** Copyright (C) 2018 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtCore module of the Qt Toolkit.
+** This file is part of the documentation of the Qt Toolkit.
 **
-** $QT_BEGIN_LICENSE:LGPL$
+** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
@@ -14,24 +14,35 @@
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 3 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL3 included in the
-** packaging of this file. Please review the following information to
-** ensure the GNU Lesser General Public License version 3 requirements
-** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 2.0 or (at your option) the GNU General
-** Public license version 3 or any later version approved by the KDE Free
-** Qt Foundation. The licenses are as published by the Free Software
-** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-2.0.html and
-** https://www.gnu.org/licenses/gpl-3.0.html.
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
diff --git a/src/corelib/doc/snippets/code/src_corelib_global_qrandom.cpp b/src/corelib/doc/snippets/code/src_corelib_global_qrandom.cpp
index b03e656b64..6e47a7a3d9 100644
--- a/src/corelib/doc/snippets/code/src_corelib_global_qrandom.cpp
+++ b/src/corelib/doc/snippets/code/src_corelib_global_qrandom.cpp
@@ -4,9 +4,9 @@
 ** Copyright (C) 2018 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtCore module of the Qt Toolkit.
+** This file is part of the documentation of the Qt Toolkit.
 **
-** $QT_BEGIN_LICENSE:LGPL$
+** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
@@ -15,24 +15,35 @@
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 3 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL3 included in the
-** packaging of this file. Please review the following information to
-** ensure the GNU Lesser General Public License version 3 requirements
-** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
 **
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 2.0 or (at your option) the GNU General
-** Public license version 3 or any later version approved by the KDE Free
-** Qt Foundation. The licenses are as published by the Free Software
-** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-2.0.html and
-** https://www.gnu.org/licenses/gpl-3.0.html.
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
diff --git a/src/corelib/doc/snippets/code/src_corelib_io_qdebug.cpp b/src/corelib/doc/snippets/code/src_corelib_io_qdebug.cpp
index 4bbdc509ca..14e72e99dd 100644
--- a/src/corelib/doc/snippets/code/src_corelib_io_qdebug.cpp
+++ b/src/corelib/doc/snippets/code/src_corelib_io_qdebug.cpp
@@ -3,9 +3,9 @@
 ** Copyright (C) 2018 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtCore module of the Qt Toolkit.
+** This file is part of the documentation of the Qt Toolkit.
 **
-** $QT_BEGIN_LICENSE:LGPL$
+** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
@@ -14,24 +14,35 @@
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 3 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL3 included in the
-** packaging of this file. Please review the following information to
-** ensure the GNU Lesser General Public License version 3 requirements
-** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
 **
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 2.0 or (at your option) the GNU General
-** Public license version 3 or any later version approved by the KDE Free
-** Qt Foundation. The licenses are as published by the Free Software
-** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-2.0.html and
-** https://www.gnu.org/licenses/gpl-3.0.html.
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
diff --git a/src/corelib/doc/snippets/code/src_corelib_io_qfileselector.cpp b/src/corelib/doc/snippets/code/src_corelib_io_qfileselector.cpp
index 91c94eb762..0d1aa691cf 100644
--- a/src/corelib/doc/snippets/code/src_corelib_io_qfileselector.cpp
+++ b/src/corelib/doc/snippets/code/src_corelib_io_qfileselector.cpp
@@ -3,9 +3,9 @@
 ** Copyright (C) 2018 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtWidgets module of the Qt Toolkit.
+** This file is part of the documentation of the Qt Toolkit.
 **
-** $QT_BEGIN_LICENSE:LGPL$
+** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
@@ -14,24 +14,35 @@
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 3 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL3 included in the
-** packaging of this file. Please review the following information to
-** ensure the GNU Lesser General Public License version 3 requirements
-** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
 **
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 2.0 or (at your option) the GNU General
-** Public license version 3 or any later version approved by the KDE Free
-** Qt Foundation. The licenses are as published by the Free Software
-** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-2.0.html and
-** https://www.gnu.org/licenses/gpl-3.0.html.
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
diff --git a/src/corelib/doc/snippets/code/src_corelib_io_qloggingcategory.cpp b/src/corelib/doc/snippets/code/src_corelib_io_qloggingcategory.cpp
index 20ae52a251..cab48f1e27 100644
--- a/src/corelib/doc/snippets/code/src_corelib_io_qloggingcategory.cpp
+++ b/src/corelib/doc/snippets/code/src_corelib_io_qloggingcategory.cpp
@@ -3,9 +3,9 @@
 ** Copyright (C) 2018 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtCore module of the Qt Toolkit.
+** This file is part of the documentation of the Qt Toolkit.
 **
-** $QT_BEGIN_LICENSE:LGPL$
+** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
@@ -14,24 +14,35 @@
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 3 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL3 included in the
-** packaging of this file. Please review the following information to
-** ensure the GNU Lesser General Public License version 3 requirements
-** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 2.0 or (at your option) the GNU General
-** Public license version 3 or any later version approved by the KDE Free
-** Qt Foundation. The licenses are as published by the Free Software
-** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-2.0.html and
-** https://www.gnu.org/licenses/gpl-3.0.html.
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
diff --git a/src/corelib/doc/snippets/code/src_corelib_io_qstorageinfo.cpp b/src/corelib/doc/snippets/code/src_corelib_io_qstorageinfo.cpp
index e0594433ff..c7a1b34f7a 100644
--- a/src/corelib/doc/snippets/code/src_corelib_io_qstorageinfo.cpp
+++ b/src/corelib/doc/snippets/code/src_corelib_io_qstorageinfo.cpp
@@ -3,9 +3,9 @@
 ** Copyright (C) 2014 Ivan Komissarov
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtCore module of the Qt Toolkit.
+** This file is part of the documentation of the Qt Toolkit.
 **
-** $QT_BEGIN_LICENSE:LGPL$
+** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
@@ -14,24 +14,35 @@
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 3 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL3 included in the
-** packaging of this file. Please review the following information to
-** ensure the GNU Lesser General Public License version 3 requirements
-** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
 **
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 2.0 or (at your option) the GNU General
-** Public license version 3 or any later version approved by the KDE Free
-** Qt Foundation. The licenses are as published by the Free Software
-** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-2.0.html and
-** https://www.gnu.org/licenses/gpl-3.0.html.
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
diff --git a/src/corelib/doc/snippets/code/src_corelib_io_qurlquery.cpp b/src/corelib/doc/snippets/code/src_corelib_io_qurlquery.cpp
index da87bfd143..22f1d3260f 100644
--- a/src/corelib/doc/snippets/code/src_corelib_io_qurlquery.cpp
+++ b/src/corelib/doc/snippets/code/src_corelib_io_qurlquery.cpp
@@ -3,9 +3,9 @@
 ** Copyright (C) 2018 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtWidgets module of the Qt Toolkit.
+** This file is part of the documentation of the Qt Toolkit.
 **
-** $QT_BEGIN_LICENSE:LGPL$
+** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
@@ -14,24 +14,35 @@
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 3 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL3 included in the
-** packaging of this file. Please review the following information to
-** ensure the GNU Lesser General Public License version 3 requirements
-** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 2.0 or (at your option) the GNU General
-** Public license version 3 or any later version approved by the KDE Free
-** Qt Foundation. The licenses are as published by the Free Software
-** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-2.0.html and
-** https://www.gnu.org/licenses/gpl-3.0.html.
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
diff --git a/src/corelib/doc/snippets/code/src_corelib_kernel_qdeadlinetimer.cpp b/src/corelib/doc/snippets/code/src_corelib_kernel_qdeadlinetimer.cpp
index eb291d7b18..35c06f842e 100644
--- a/src/corelib/doc/snippets/code/src_corelib_kernel_qdeadlinetimer.cpp
+++ b/src/corelib/doc/snippets/code/src_corelib_kernel_qdeadlinetimer.cpp
@@ -3,9 +3,9 @@
 ** Copyright (C) 2018 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtWidgets module of the Qt Toolkit.
+** This file is part of the documentation of the Qt Toolkit.
 **
-** $QT_BEGIN_LICENSE:LGPL$
+** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
@@ -14,24 +14,35 @@
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 3 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL3 included in the
-** packaging of this file. Please review the following information to
-** ensure the GNU Lesser General Public License version 3 requirements
-** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
 **
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 2.0 or (at your option) the GNU General
-** Public license version 3 or any later version approved by the KDE Free
-** Qt Foundation. The licenses are as published by the Free Software
-** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-2.0.html and
-** https://www.gnu.org/licenses/gpl-3.0.html.
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
diff --git a/src/corelib/doc/snippets/code/src_corelib_serialization_qcborstream.cpp b/src/corelib/doc/snippets/code/src_corelib_serialization_qcborstream.cpp
index dbe38aa4b5..6ddb5a9365 100644
--- a/src/corelib/doc/snippets/code/src_corelib_serialization_qcborstream.cpp
+++ b/src/corelib/doc/snippets/code/src_corelib_serialization_qcborstream.cpp
@@ -3,9 +3,9 @@
 ** Copyright (C) 2018 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtWidgets module of the Qt Toolkit.
+** This file is part of the documentation of the Qt Toolkit.
 **
-** $QT_BEGIN_LICENSE:LGPL$
+** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
@@ -14,24 +14,35 @@
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 3 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL3 included in the
-** packaging of this file. Please review the following information to
-** ensure the GNU Lesser General Public License version 3 requirements
-** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
 **
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 2.0 or (at your option) the GNU General
-** Public license version 3 or any later version approved by the KDE Free
-** Qt Foundation. The licenses are as published by the Free Software
-** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-2.0.html and
-** https://www.gnu.org/licenses/gpl-3.0.html.
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
diff --git a/src/corelib/doc/snippets/code/src_corelib_serialization_qcborvalue.cpp b/src/corelib/doc/snippets/code/src_corelib_serialization_qcborvalue.cpp
index 63f813cf69..5406536cfe 100644
--- a/src/corelib/doc/snippets/code/src_corelib_serialization_qcborvalue.cpp
+++ b/src/corelib/doc/snippets/code/src_corelib_serialization_qcborvalue.cpp
@@ -3,9 +3,9 @@
 ** Copyright (C) 2018 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtWidgets module of the Qt Toolkit.
+** This file is part of the documentation of the Qt Toolkit.
 **
-** $QT_BEGIN_LICENSE:LGPL$
+** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
@@ -14,24 +14,35 @@
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 3 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL3 included in the
-** packaging of this file. Please review the following information to
-** ensure the GNU Lesser General Public License version 3 requirements
-** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
 **
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 2.0 or (at your option) the GNU General
-** Public license version 3 or any later version approved by the KDE Free
-** Qt Foundation. The licenses are as published by the Free Software
-** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-2.0.html and
-** https://www.gnu.org/licenses/gpl-3.0.html.
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
diff --git a/src/corelib/doc/snippets/code/src_corelib_serialization_qdatastream.cpp b/src/corelib/doc/snippets/code/src_corelib_serialization_qdatastream.cpp
index 5caaa16727..cfcc2f8f94 100644
--- a/src/corelib/doc/snippets/code/src_corelib_serialization_qdatastream.cpp
+++ b/src/corelib/doc/snippets/code/src_corelib_serialization_qdatastream.cpp
@@ -3,9 +3,9 @@
 ** Copyright (C) 2018 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtCore module of the Qt Toolkit.
+** This file is part of the documentation of the Qt Toolkit.
 **
-** $QT_BEGIN_LICENSE:LGPL$
+** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
@@ -14,24 +14,35 @@
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 3 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL3 included in the
-** packaging of this file. Please review the following information to
-** ensure the GNU Lesser General Public License version 3 requirements
-** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 2.0 or (at your option) the GNU General
-** Public license version 3 or any later version approved by the KDE Free
-** Qt Foundation. The licenses are as published by the Free Software
-** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-2.0.html and
-** https://www.gnu.org/licenses/gpl-3.0.html.
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
diff --git a/src/corelib/doc/snippets/code/src_corelib_serialization_qjsondocument.cpp b/src/corelib/doc/snippets/code/src_corelib_serialization_qjsondocument.cpp
index c4913b1740..1fe328c0a0 100644
--- a/src/corelib/doc/snippets/code/src_corelib_serialization_qjsondocument.cpp
+++ b/src/corelib/doc/snippets/code/src_corelib_serialization_qjsondocument.cpp
@@ -3,9 +3,9 @@
 ** Copyright (C) 2018 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtCore module of the Qt Toolkit.
+** This file is part of the documentation of the Qt Toolkit.
 **
-** $QT_BEGIN_LICENSE:LGPL$
+** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
@@ -14,24 +14,35 @@
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 3 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL3 included in the
-** packaging of this file. Please review the following information to
-** ensure the GNU Lesser General Public License version 3 requirements
-** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 2.0 or (at your option) the GNU General
-** Public license version 3 or any later version approved by the KDE Free
-** Qt Foundation. The licenses are as published by the Free Software
-** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-2.0.html and
-** https://www.gnu.org/licenses/gpl-3.0.html.
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
diff --git a/src/corelib/doc/snippets/code/src_corelib_tools_qbytearraymatcher.cpp b/src/corelib/doc/snippets/code/src_corelib_tools_qbytearraymatcher.cpp
index 63fc1f91e7..9cf94f0494 100644
--- a/src/corelib/doc/snippets/code/src_corelib_tools_qbytearraymatcher.cpp
+++ b/src/corelib/doc/snippets/code/src_corelib_tools_qbytearraymatcher.cpp
@@ -3,9 +3,9 @@
 ** Copyright (C) 2018 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtCore module of the Qt Toolkit.
+** This file is part of the documentation of the Qt Toolkit.
 **
-** $QT_BEGIN_LICENSE:LGPL$
+** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
@@ -14,24 +14,35 @@
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 3 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL3 included in the
-** packaging of this file. Please review the following information to
-** ensure the GNU Lesser General Public License version 3 requirements
-** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 2.0 or (at your option) the GNU General
-** Public license version 3 or any later version approved by the KDE Free
-** Qt Foundation. The licenses are as published by the Free Software
-** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-2.0.html and
-** https://www.gnu.org/licenses/gpl-3.0.html.
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
diff --git a/src/corelib/doc/snippets/code/src_corelib_tools_qcontiguouscache.cpp b/src/corelib/doc/snippets/code/src_corelib_tools_qcontiguouscache.cpp
index 6bc9604243..84780374e9 100644
--- a/src/corelib/doc/snippets/code/src_corelib_tools_qcontiguouscache.cpp
+++ b/src/corelib/doc/snippets/code/src_corelib_tools_qcontiguouscache.cpp
@@ -3,9 +3,9 @@
 ** Copyright (C) 2018 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtCore module of the Qt Toolkit.
+** This file is part of the documentation of the Qt Toolkit.
 **
-** $QT_BEGIN_LICENSE:LGPL$
+** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
@@ -14,24 +14,35 @@
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 3 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL3 included in the
-** packaging of this file. Please review the following information to
-** ensure the GNU Lesser General Public License version 3 requirements
-** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 2.0 or (at your option) the GNU General
-** Public license version 3 or any later version approved by the KDE Free
-** Qt Foundation. The licenses are as published by the Free Software
-** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-2.0.html and
-** https://www.gnu.org/licenses/gpl-3.0.html.
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
diff --git a/src/corelib/doc/snippets/code/src_corelib_tools_qshareddata.cpp b/src/corelib/doc/snippets/code/src_corelib_tools_qshareddata.cpp
index 45e8b0a965..88c8ae4151 100644
--- a/src/corelib/doc/snippets/code/src_corelib_tools_qshareddata.cpp
+++ b/src/corelib/doc/snippets/code/src_corelib_tools_qshareddata.cpp
@@ -3,9 +3,9 @@
 ** Copyright (C) 2018 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtCore module of the Qt Toolkit.
+** This file is part of the documentation of the Qt Toolkit.
 **
-** $QT_BEGIN_LICENSE:LGPL$
+** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
@@ -14,24 +14,35 @@
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 3 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL3 included in the
-** packaging of this file. Please review the following information to
-** ensure the GNU Lesser General Public License version 3 requirements
-** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 2.0 or (at your option) the GNU General
-** Public license version 3 or any later version approved by the KDE Free
-** Qt Foundation. The licenses are as published by the Free Software
-** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-2.0.html and
-** https://www.gnu.org/licenses/gpl-3.0.html.
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
diff --git a/src/corelib/doc/snippets/code/src_corelib_tools_qsharedpointer.cpp b/src/corelib/doc/snippets/code/src_corelib_tools_qsharedpointer.cpp
index 69061ce298..e2979fa7b4 100644
--- a/src/corelib/doc/snippets/code/src_corelib_tools_qsharedpointer.cpp
+++ b/src/corelib/doc/snippets/code/src_corelib_tools_qsharedpointer.cpp
@@ -3,9 +3,9 @@
 ** Copyright (C) 2018 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtCore module of the Qt Toolkit.
+** This file is part of the documentation of the Qt Toolkit.
 **
-** $QT_BEGIN_LICENSE:LGPL$
+** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
@@ -14,24 +14,35 @@
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 3 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL3 included in the
-** packaging of this file. Please review the following information to
-** ensure the GNU Lesser General Public License version 3 requirements
-** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
 **
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 2.0 or (at your option) the GNU General
-** Public license version 3 or any later version approved by the KDE Free
-** Qt Foundation. The licenses are as published by the Free Software
-** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-2.0.html and
-** https://www.gnu.org/licenses/gpl-3.0.html.
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
diff --git a/src/corelib/doc/snippets/code/src_corelib_tools_qstringview.cpp b/src/corelib/doc/snippets/code/src_corelib_tools_qstringview.cpp
index 5dc153372c..fc426e1977 100644
--- a/src/corelib/doc/snippets/code/src_corelib_tools_qstringview.cpp
+++ b/src/corelib/doc/snippets/code/src_corelib_tools_qstringview.cpp
@@ -3,9 +3,9 @@
 ** Copyright (C) 2018 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtWidgets module of the Qt Toolkit.
+** This file is part of the documentation of the Qt Toolkit.
 **
-** $QT_BEGIN_LICENSE:LGPL$
+** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
@@ -14,24 +14,35 @@
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 3 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL3 included in the
-** packaging of this file. Please review the following information to
-** ensure the GNU Lesser General Public License version 3 requirements
-** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 2.0 or (at your option) the GNU General
-** Public license version 3 or any later version approved by the KDE Free
-** Qt Foundation. The licenses are as published by the Free Software
-** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-2.0.html and
-** https://www.gnu.org/licenses/gpl-3.0.html.
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
diff --git a/src/corelib/doc/snippets/code/src_gui_itemviews_qidentityproxymodel.cpp b/src/corelib/doc/snippets/code/src_gui_itemviews_qidentityproxymodel.cpp
index d89e28836f..c1af521c03 100644
--- a/src/corelib/doc/snippets/code/src_gui_itemviews_qidentityproxymodel.cpp
+++ b/src/corelib/doc/snippets/code/src_gui_itemviews_qidentityproxymodel.cpp
@@ -3,7 +3,7 @@
 ** Copyright (C) 2016 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Stephen Kelly <stephen.kelly@kdab.com>
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtGui module of the Qt Toolkit.
+** This file is part of the documentation of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
diff --git a/src/corelib/doc/snippets/hellotrmain.cpp b/src/corelib/doc/snippets/hellotrmain.cpp
index 7e09c58f4f..2fab919a47 100644
--- a/src/corelib/doc/snippets/hellotrmain.cpp
+++ b/src/corelib/doc/snippets/hellotrmain.cpp
@@ -3,7 +3,7 @@
 ** Copyright (C) 2016 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the examples of the Qt Toolkit.
+** This file is part of the documentation of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
diff --git a/src/corelib/doc/snippets/qbytearraylist/main.cpp b/src/corelib/doc/snippets/qbytearraylist/main.cpp
index 8a861eca4a..fd52ef945b 100644
--- a/src/corelib/doc/snippets/qbytearraylist/main.cpp
+++ b/src/corelib/doc/snippets/qbytearraylist/main.cpp
@@ -3,9 +3,9 @@
 ** Copyright (C) 2014 by Southwest Research Institute (R)
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtCore module of the Qt Toolkit.
+** This file is part of the documentation of the Qt Toolkit.
 **
-** $QT_BEGIN_LICENSE:LGPL$
+** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
@@ -14,24 +14,35 @@
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 3 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL3 included in the
-** packaging of this file. Please review the following information to
-** ensure the GNU Lesser General Public License version 3 requirements
-** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 2.0 or (at your option) the GNU General
-** Public license version 3 or any later version approved by the KDE Free
-** Qt Foundation. The licenses are as published by the Free Software
-** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-2.0.html and
-** https://www.gnu.org/licenses/gpl-3.0.html.
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
diff --git a/src/corelib/doc/snippets/qelapsedtimer/main.cpp b/src/corelib/doc/snippets/qelapsedtimer/main.cpp
index add6ad0169..408c4eab07 100644
--- a/src/corelib/doc/snippets/qelapsedtimer/main.cpp
+++ b/src/corelib/doc/snippets/qelapsedtimer/main.cpp
@@ -3,7 +3,7 @@
 ** Copyright (C) 2016 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtNetwork module of the Qt Toolkit.
+** This file is part of the documentation of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
diff --git a/src/corelib/doc/snippets/qloggingcategory/main.cpp b/src/corelib/doc/snippets/qloggingcategory/main.cpp
index 73df3c2d2f..f5c47b2ae8 100644
--- a/src/corelib/doc/snippets/qloggingcategory/main.cpp
+++ b/src/corelib/doc/snippets/qloggingcategory/main.cpp
@@ -3,7 +3,7 @@
 ** Copyright (C) 2016 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the examples of the Qt Toolkit.
+** This file is part of the documentation of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
diff --git a/src/corelib/doc/snippets/resource-system/mainwindow.cpp b/src/corelib/doc/snippets/resource-system/mainwindow.cpp
index 6fcf52e588..bbeeec64ac 100644
--- a/src/corelib/doc/snippets/resource-system/mainwindow.cpp
+++ b/src/corelib/doc/snippets/resource-system/mainwindow.cpp
@@ -3,7 +3,7 @@
 ** Copyright (C) 2016 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the examples of the Qt Toolkit.
+** This file is part of the documentation of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
diff --git a/src/corelib/doc/snippets/timers/analogclock.cpp b/src/corelib/doc/snippets/timers/analogclock.cpp
index 0dc2fbc708..4e1957a450 100644
--- a/src/corelib/doc/snippets/timers/analogclock.cpp
+++ b/src/corelib/doc/snippets/timers/analogclock.cpp
@@ -3,7 +3,7 @@
 ** Copyright (C) 2016 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the examples of the Qt Toolkit.
+** This file is part of the documentation of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
diff --git a/src/corelib/doc/src/external-resources.qdoc b/src/corelib/doc/src/external-resources.qdoc
index f7c9dbb365..f16a21d521 100644
--- a/src/corelib/doc/src/external-resources.qdoc
+++ b/src/corelib/doc/src/external-resources.qdoc
@@ -32,13 +32,13 @@
 */
 
 /*!
-    \externalpage http://www.geocities.com/Athens/5180/tsciiset.html
-    \title http://www.geocities.com/Athens/5180/tsciiset.html
+    \externalpage https://en.wikipedia.org/wiki/Tamil_Script_Code_for_Information_Interchange
+    \title  Tamil Script Code
 */
 
 /*!
-    \externalpage http://www.tamil.net/tscii/
-    \title http://www.tamil.net/tscii/
+    \externalpage http://home.infitt.org
+    \title Information Technology in Tamil
 */
 
 /*!
diff --git a/src/corelib/global/archdetect.cpp b/src/corelib/global/archdetect.cpp
index 422df3ff90..66a5e074f6 100644
--- a/src/corelib/global/archdetect.cpp
+++ b/src/corelib/global/archdetect.cpp
@@ -4,7 +4,7 @@
 ** Copyright (C) 2016 Intel Corporation.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the FOO module of the Qt Toolkit.
+** This file is part of the QtCore module of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:LGPL$
 ** Commercial License Usage
diff --git a/src/corelib/global/qendian.h b/src/corelib/global/qendian.h
index f2e5833468..615f523888 100644
--- a/src/corelib/global/qendian.h
+++ b/src/corelib/global/qendian.h
@@ -204,9 +204,9 @@ template <typename T> inline Q_DECL_CONSTEXPR T qToBigEndian(T source)
 template <typename T> inline Q_DECL_CONSTEXPR T qFromBigEndian(T source)
 { return source; }
 template <typename T> inline Q_DECL_CONSTEXPR T qToLittleEndian(T source)
-{ return qbswap<T>(source); }
+{ return qbswap(source); }
 template <typename T> inline Q_DECL_CONSTEXPR T qFromLittleEndian(T source)
-{ return qbswap<T>(source); }
+{ return qbswap(source); }
 template <typename T> inline void qToBigEndian(T src, void *dest)
 { qToUnaligned<T>(src, dest); }
 template <typename T> inline void qToLittleEndian(T src, void *dest)
diff --git a/src/corelib/global/qfloat16.h b/src/corelib/global/qfloat16.h
index a8befd7adb..3e50ad8467 100644
--- a/src/corelib/global/qfloat16.h
+++ b/src/corelib/global/qfloat16.h
@@ -123,6 +123,7 @@ Q_REQUIRED_RESULT inline bool qIsNull(qfloat16 f) Q_DECL_NOTHROW
 inline int qIntCast(qfloat16 f) Q_DECL_NOTHROW
 { return int(static_cast<float>(f)); }
 
+#ifndef Q_QDOC
 QT_WARNING_PUSH
 QT_WARNING_DISABLE_CLANG("-Wc99-extensions")
 QT_WARNING_DISABLE_GCC("-Wold-style-cast")
@@ -162,6 +163,7 @@ inline qfloat16::operator float() const Q_DECL_NOTHROW
     return f;
 #endif
 }
+#endif
 
 inline qfloat16 operator-(qfloat16 a) Q_DECL_NOTHROW
 {
diff --git a/src/corelib/global/qnumeric_p.h b/src/corelib/global/qnumeric_p.h
index dd59f97f8b..4a225b2599 100644
--- a/src/corelib/global/qnumeric_p.h
+++ b/src/corelib/global/qnumeric_p.h
@@ -231,7 +231,7 @@ QT_WARNING_POP
 // size_t. Implementations for 8- and 16-bit types will work but may not be as
 // efficient. Implementations for 64-bit may be missing on 32-bit platforms.
 
-#if (defined(Q_CC_GNU) && (Q_CC_GNU >= 500) || (defined(Q_CC_INTEL) && !defined(Q_OS_WIN))) || QT_HAS_BUILTIN(__builtin_add_overflowx)
+#if (defined(Q_CC_GNU) && (Q_CC_GNU >= 500) || (defined(Q_CC_INTEL) && !defined(Q_OS_WIN))) || QT_HAS_BUILTIN(__builtin_add_overflow)
 // GCC 5, ICC 18, and Clang 3.8 have builtins to detect overflows
 
 template <typename T> inline
@@ -373,10 +373,18 @@ template <> inline bool add_overflow(unsigned v1, unsigned v2, unsigned *r)
 
 // 32-bit mul_overflow is fine with the generic code above
 
-#    if defined(Q_PROCESSOR_X86_64)
 template <> inline bool add_overflow(quint64 v1, quint64 v2, quint64 *r)
-{ return _addcarry_u64(0, v1, v2, reinterpret_cast<unsigned __int64 *>(r)); }
-#    endif // x86-64
+{
+#    if defined(Q_PROCESSOR_X86_64)
+    return _addcarry_u64(0, v1, v2, reinterpret_cast<unsigned __int64 *>(r));
+#    else
+    uint low, high;
+    uchar carry = _addcarry_u32(0, unsigned(v1), unsigned(v2), &low);
+    carry = _addcarry_u32(carry, v1 >> 32, v2 >> 32, &high);
+    *r = (quint64(high) << 32) | low;
+    return carry;
+#    endif // !x86-64
+}
 #  endif // MSVC X86
 #endif // !GCC
 }
diff --git a/src/corelib/io/qdebug.h b/src/corelib/io/qdebug.h
index ae1869f89e..9d1ce51da5 100644
--- a/src/corelib/io/qdebug.h
+++ b/src/corelib/io/qdebug.h
@@ -96,7 +96,7 @@ class Q_CORE_EXPORT QDebug
         void setVerbosity(int v)
         {
             if (context.version > 1) {
-                flags &= ~(VerbosityMask << VerbosityShift);
+                flags &= ~(uint(VerbosityMask) << VerbosityShift);
                 flags |= (v & VerbosityMask) << VerbosityShift;
             }
         }
diff --git a/src/corelib/io/qdir.cpp b/src/corelib/io/qdir.cpp
index 405718aba8..4b63a38963 100644
--- a/src/corelib/io/qdir.cpp
+++ b/src/corelib/io/qdir.cpp
@@ -2127,10 +2127,9 @@ QString QDir::rootPath()
 bool QDir::match(const QStringList &filters, const QString &fileName)
 {
     for (QStringList::ConstIterator sit = filters.constBegin(); sit != filters.constEnd(); ++sit) {
-        QString wildcard = QRegularExpression::wildcardToRegularExpression(*sit);
         // Insensitive exact match
         // (see Notes for QRegExp Users in QRegularExpression's documentation)
-        QRegularExpression rx(QRegularExpression::anchoredPattern(wildcard),
+        QRegularExpression rx(QRegularExpression::wildcardToRegularExpression(*sit),
                               QRegularExpression::CaseInsensitiveOption);
         if (rx.match(fileName).hasMatch())
             return true;
diff --git a/src/corelib/io/qfileinfo.cpp b/src/corelib/io/qfileinfo.cpp
index 26078a6c71..185e061d8f 100644
--- a/src/corelib/io/qfileinfo.cpp
+++ b/src/corelib/io/qfileinfo.cpp
@@ -703,6 +703,8 @@ bool QFileInfo::exists() const
 */
 bool QFileInfo::exists(const QString &file)
 {
+    if (file.isEmpty())
+        return false;
     QFileSystemEntry entry(file);
     QFileSystemMetaData data;
     QAbstractFileEngine *engine =
diff --git a/src/corelib/itemmodels/qabstractproxymodel.cpp b/src/corelib/itemmodels/qabstractproxymodel.cpp
index b7c49a53e4..62b3ee85b9 100644
--- a/src/corelib/itemmodels/qabstractproxymodel.cpp
+++ b/src/corelib/itemmodels/qabstractproxymodel.cpp
@@ -3,7 +3,7 @@
 ** Copyright (C) 2016 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtGui module of the Qt Toolkit.
+** This file is part of the QtCore module of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:LGPL$
 ** Commercial License Usage
diff --git a/src/corelib/itemmodels/qabstractproxymodel.h b/src/corelib/itemmodels/qabstractproxymodel.h
index c4e5d67908..08ecf9d15f 100644
--- a/src/corelib/itemmodels/qabstractproxymodel.h
+++ b/src/corelib/itemmodels/qabstractproxymodel.h
@@ -3,7 +3,7 @@
 ** Copyright (C) 2016 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtGui module of the Qt Toolkit.
+** This file is part of the QtCore module of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:LGPL$
 ** Commercial License Usage
diff --git a/src/corelib/itemmodels/qabstractproxymodel_p.h b/src/corelib/itemmodels/qabstractproxymodel_p.h
index 3a9f33baba..f7bd5cc691 100644
--- a/src/corelib/itemmodels/qabstractproxymodel_p.h
+++ b/src/corelib/itemmodels/qabstractproxymodel_p.h
@@ -3,7 +3,7 @@
 ** Copyright (C) 2016 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtGui module of the Qt Toolkit.
+** This file is part of the QtCore module of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:LGPL$
 ** Commercial License Usage
diff --git a/src/corelib/itemmodels/qidentityproxymodel.cpp b/src/corelib/itemmodels/qidentityproxymodel.cpp
index c1e23dbd0c..f869601d3f 100644
--- a/src/corelib/itemmodels/qidentityproxymodel.cpp
+++ b/src/corelib/itemmodels/qidentityproxymodel.cpp
@@ -3,7 +3,7 @@
 ** Copyright (C) 2011 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Stephen Kelly <stephen.kelly@kdab.com>
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtGui module of the Qt Toolkit.
+** This file is part of the QtCore module of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:LGPL$
 ** Commercial License Usage
diff --git a/src/corelib/itemmodels/qidentityproxymodel.h b/src/corelib/itemmodels/qidentityproxymodel.h
index 3e6f5e4c48..89ac89cdba 100644
--- a/src/corelib/itemmodels/qidentityproxymodel.h
+++ b/src/corelib/itemmodels/qidentityproxymodel.h
@@ -3,7 +3,7 @@
 ** Copyright (C) 2011 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Stephen Kelly <stephen.kelly@kdab.com>
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtGui module of the Qt Toolkit.
+** This file is part of the QtCore module of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:LGPL$
 ** Commercial License Usage
diff --git a/src/corelib/itemmodels/qitemselectionmodel.cpp b/src/corelib/itemmodels/qitemselectionmodel.cpp
index edb9bb9098..1bacb63b17 100644
--- a/src/corelib/itemmodels/qitemselectionmodel.cpp
+++ b/src/corelib/itemmodels/qitemselectionmodel.cpp
@@ -3,7 +3,7 @@
 ** Copyright (C) 2016 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtGui module of the Qt Toolkit.
+** This file is part of the QtCore module of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:LGPL$
 ** Commercial License Usage
diff --git a/src/corelib/itemmodels/qitemselectionmodel.h b/src/corelib/itemmodels/qitemselectionmodel.h
index 63e5f0ca9c..1c924053a5 100644
--- a/src/corelib/itemmodels/qitemselectionmodel.h
+++ b/src/corelib/itemmodels/qitemselectionmodel.h
@@ -3,7 +3,7 @@
 ** Copyright (C) 2016 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtGui module of the Qt Toolkit.
+** This file is part of the QtCore module of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:LGPL$
 ** Commercial License Usage
diff --git a/src/corelib/itemmodels/qitemselectionmodel_p.h b/src/corelib/itemmodels/qitemselectionmodel_p.h
index 187d4a2c1d..e12a0c2928 100644
--- a/src/corelib/itemmodels/qitemselectionmodel_p.h
+++ b/src/corelib/itemmodels/qitemselectionmodel_p.h
@@ -3,7 +3,7 @@
 ** Copyright (C) 2016 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtGui module of the Qt Toolkit.
+** This file is part of the QtCore module of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:LGPL$
 ** Commercial License Usage
diff --git a/src/corelib/itemmodels/qsortfilterproxymodel.cpp b/src/corelib/itemmodels/qsortfilterproxymodel.cpp
index 21fbf83382..87960b0863 100644
--- a/src/corelib/itemmodels/qsortfilterproxymodel.cpp
+++ b/src/corelib/itemmodels/qsortfilterproxymodel.cpp
@@ -3,7 +3,7 @@
 ** Copyright (C) 2016 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtGui module of the Qt Toolkit.
+** This file is part of the QtCore module of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:LGPL$
 ** Commercial License Usage
diff --git a/src/corelib/itemmodels/qsortfilterproxymodel.h b/src/corelib/itemmodels/qsortfilterproxymodel.h
index 0be8b88672..303226668f 100644
--- a/src/corelib/itemmodels/qsortfilterproxymodel.h
+++ b/src/corelib/itemmodels/qsortfilterproxymodel.h
@@ -3,7 +3,7 @@
 ** Copyright (C) 2016 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtGui module of the Qt Toolkit.
+** This file is part of the QtCore module of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:LGPL$
 ** Commercial License Usage
diff --git a/src/corelib/itemmodels/qstringlistmodel.cpp b/src/corelib/itemmodels/qstringlistmodel.cpp
index 567e6fa35e..f92a0d6676 100644
--- a/src/corelib/itemmodels/qstringlistmodel.cpp
+++ b/src/corelib/itemmodels/qstringlistmodel.cpp
@@ -3,7 +3,7 @@
 ** Copyright (C) 2016 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtGui module of the Qt Toolkit.
+** This file is part of the QtCore module of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:LGPL$
 ** Commercial License Usage
@@ -184,7 +184,10 @@ bool QStringListModel::setData(const QModelIndex &index, const QVariant &value,
 {
     if (index.row() >= 0 && index.row() < lst.size()
         && (role == Qt::EditRole || role == Qt::DisplayRole)) {
-        lst.replace(index.row(), value.toString());
+        const QString valueString = value.toString();
+        if (lst.at(index.row()) == valueString)
+            return true;
+        lst.replace(index.row(), valueString);
         QVector<int> roles;
         roles.reserve(2);
         roles.append(Qt::DisplayRole);
diff --git a/src/corelib/itemmodels/qstringlistmodel.h b/src/corelib/itemmodels/qstringlistmodel.h
index a40c13ae40..53376285c6 100644
--- a/src/corelib/itemmodels/qstringlistmodel.h
+++ b/src/corelib/itemmodels/qstringlistmodel.h
@@ -3,7 +3,7 @@
 ** Copyright (C) 2016 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtGui module of the Qt Toolkit.
+** This file is part of the QtCore module of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:LGPL$
 ** Commercial License Usage
diff --git a/src/corelib/kernel/qcore_mac_objc.mm b/src/corelib/kernel/qcore_mac_objc.mm
index 4ca9c2e996..bc23e821fd 100644
--- a/src/corelib/kernel/qcore_mac_objc.mm
+++ b/src/corelib/kernel/qcore_mac_objc.mm
@@ -1,52 +1,47 @@
 /****************************************************************************
- **
- ** Copyright (C) 2016 The Qt Company Ltd.
- ** Copyright (C) 2014 Petroules Corporation.
- ** Contact: https://www.qt.io/licensing/
- **
- ** This file is part of the QtCore module of the Qt Toolkit.
- **
- ** $QT_BEGIN_LICENSE:LGPL$
- ** Commercial License Usage
- ** Licensees holding valid commercial Qt licenses may use this file in
- ** accordance with the commercial license agreement provided with the
- ** Software or, alternatively, in accordance with the terms contained in
- ** a written agreement between you and The Qt Company. For licensing terms
- ** and conditions see https://www.qt.io/terms-conditions. For further
- ** information use the contact form at https://www.qt.io/contact-us.
- **
- ** GNU Lesser General Public License Usage
- ** Alternatively, this file may be used under the terms of the GNU Lesser
- ** General Public License version 3 as published by the Free Software
- ** Foundation and appearing in the file LICENSE.LGPL3 included in the
- ** packaging of this file. Please review the following information to
- ** ensure the GNU Lesser General Public License version 3 requirements
- ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
- **
- ** GNU General Public License Usage
- ** Alternatively, this file may be used under the terms of the GNU
- ** General Public License version 2.0 or (at your option) the GNU General
- ** Public license version 3 or any later version approved by the KDE Free
- ** Qt Foundation. The licenses are as published by the Free Software
- ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
- ** included in the packaging of this file. Please review the following
- ** information to ensure the GNU General Public License requirements will
- ** be met: https://www.gnu.org/licenses/gpl-2.0.html and
- ** https://www.gnu.org/licenses/gpl-3.0.html.
- **
- ** $QT_END_LICENSE$
- **
- ****************************************************************************/
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Copyright (C) 2014 Petroules Corporation.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
 
 #include <private/qcore_mac_p.h>
 
 #ifdef Q_OS_MACOS
-# include <AppKit/AppKit.h>
-# if !QT_MACOS_PLATFORM_SDK_EQUAL_OR_ABOVE(__MAC_10_14)
-@interface NSApplication (MojaveForwardDeclarations)
-@property (strong) NSAppearance *effectiveAppearance NS_AVAILABLE_MAC(10_14);
-@end
-# endif
+#include <AppKit/AppKit.h>
 #endif
 
 #if defined(QT_PLATFORM_UIKIT)
@@ -174,10 +169,14 @@ QDebug operator<<(QDebug debug, const QMacAutoReleasePool *pool)
 #ifdef Q_OS_MACOS
 bool qt_mac_applicationIsInDarkMode()
 {
-    if (__builtin_available(macOS 10.14, *))
-        return [NSApp.effectiveAppearance.name hasSuffix:@"DarkAqua"];
-    else
-        return false;
+#if QT_MACOS_PLATFORM_SDK_EQUAL_OR_ABOVE(__MAC_10_14)
+    if (__builtin_available(macOS 10.14, *)) {
+        auto appearance = [NSApp.effectiveAppearance bestMatchFromAppearancesWithNames:
+                @[ NSAppearanceNameAqua, NSAppearanceNameDarkAqua ]];
+        return [appearance isEqualToString:NSAppearanceNameDarkAqua];
+    }
+#endif
+    return false;
 }
 #endif
 
diff --git a/src/corelib/kernel/qmetaobject.cpp b/src/corelib/kernel/qmetaobject.cpp
index c642cd07f2..5de2717078 100644
--- a/src/corelib/kernel/qmetaobject.cpp
+++ b/src/corelib/kernel/qmetaobject.cpp
@@ -1381,6 +1381,8 @@ static inline QByteArray findMethodCandidates(const QMetaObject *metaObject, con
 }
 
 /*!
+    \threadsafe
+
     Invokes the \a member (a signal or a slot name) on the object \a
     obj. Returns \c true if the member could be invoked. Returns \c false
     if there is no such member or the parameters did not match.
@@ -1570,6 +1572,7 @@ bool QMetaObject::invokeMethodImpl(QObject *object, QtPrivate::QSlotObjectBase *
                                        QGenericArgument val7 = QGenericArgument(),
                                        QGenericArgument val8 = QGenericArgument(),
                                        QGenericArgument val9 = QGenericArgument());
+    \threadsafe
     \overload invokeMethod()
 
     This overload always invokes the member using the connection type Qt::AutoConnection.
@@ -1588,6 +1591,7 @@ bool QMetaObject::invokeMethodImpl(QObject *object, QtPrivate::QSlotObjectBase *
                              QGenericArgument val8 = QGenericArgument(),
                              QGenericArgument val9 = QGenericArgument())
 
+    \threadsafe
     \overload invokeMethod()
 
     This overload can be used if the return value of the member is of no interest.
@@ -1606,6 +1610,7 @@ bool QMetaObject::invokeMethodImpl(QObject *object, QtPrivate::QSlotObjectBase *
                              QGenericArgument val8 = QGenericArgument(),
                              QGenericArgument val9 = QGenericArgument())
 
+    \threadsafe
     \overload invokeMethod()
 
     This overload invokes the member using the connection type Qt::AutoConnection and
@@ -1617,6 +1622,7 @@ bool QMetaObject::invokeMethodImpl(QObject *object, QtPrivate::QSlotObjectBase *
 
     \since 5.10
 
+    \threadsafe
     \overload
 
     Invokes the \a function in the event loop of \a context. \a function can be a functor
@@ -1630,6 +1636,7 @@ bool QMetaObject::invokeMethodImpl(QObject *object, QtPrivate::QSlotObjectBase *
 
     \since 5.10
 
+    \threadsafe
     \overload
 
     Invokes the \a function in the event loop of \a context using the connection type Qt::AutoConnection.
diff --git a/src/corelib/kernel/qmetatype.cpp b/src/corelib/kernel/qmetatype.cpp
index eb67544f21..632b86959d 100644
--- a/src/corelib/kernel/qmetatype.cpp
+++ b/src/corelib/kernel/qmetatype.cpp
@@ -2566,6 +2566,8 @@ void *QMetaType::createExtended(const void *copy) const
 */
 void QMetaType::destroyExtended(void *data) const
 {
+    if (m_typeId == QMetaType::UnknownType)
+        return;
     if (Q_UNLIKELY(m_typedDestructor && !m_destructor))
         m_typedDestructor(m_typeId, data);
     else
@@ -2582,6 +2584,8 @@ void QMetaType::destroyExtended(void *data) const
 */
 void *QMetaType::constructExtended(void *where, const void *copy) const
 {
+    if (m_typeId == QMetaType::UnknownType)
+        return nullptr;
     if (m_typedConstructor && !m_constructor)
         return m_typedConstructor(m_typeId, where, copy);
     return nullptr;
@@ -2596,6 +2600,8 @@ void *QMetaType::constructExtended(void *where, const void *copy) const
 */
 void QMetaType::destructExtended(void *data) const
 {
+    if (m_typeId == QMetaType::UnknownType)
+        return;
     if (m_typedDestructor && !m_destructor)
         m_typedDestructor(m_typeId, data);
 }
diff --git a/src/corelib/kernel/qppsattribute.cpp b/src/corelib/kernel/qppsattribute.cpp
index ffd5c53a6d..6be462edb5 100644
--- a/src/corelib/kernel/qppsattribute.cpp
+++ b/src/corelib/kernel/qppsattribute.cpp
@@ -1,41 +1,41 @@
 /****************************************************************************
- **
- ** Copyright (C) 2013 BlackBerry Limited. All rights reserved.
- ** Contact: https://www.qt.io/licensing/
- **
- ** This file is part of the QtCore module of the Qt Toolkit.
- **
- ** $QT_BEGIN_LICENSE:LGPL$
- ** Commercial License Usage
- ** Licensees holding valid commercial Qt licenses may use this file in
- ** accordance with the commercial license agreement provided with the
- ** Software or, alternatively, in accordance with the terms contained in
- ** a written agreement between you and The Qt Company. For licensing terms
- ** and conditions see https://www.qt.io/terms-conditions. For further
- ** information use the contact form at https://www.qt.io/contact-us.
- **
- ** GNU Lesser General Public License Usage
- ** Alternatively, this file may be used under the terms of the GNU Lesser
- ** General Public License version 3 as published by the Free Software
- ** Foundation and appearing in the file LICENSE.LGPL3 included in the
- ** packaging of this file. Please review the following information to
- ** ensure the GNU Lesser General Public License version 3 requirements
- ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
- **
- ** GNU General Public License Usage
- ** Alternatively, this file may be used under the terms of the GNU
- ** General Public License version 2.0 or (at your option) the GNU General
- ** Public license version 3 or any later version approved by the KDE Free
- ** Qt Foundation. The licenses are as published by the Free Software
- ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
- ** included in the packaging of this file. Please review the following
- ** information to ensure the GNU General Public License requirements will
- ** be met: https://www.gnu.org/licenses/gpl-2.0.html and
- ** https://www.gnu.org/licenses/gpl-3.0.html.
- **
- ** $QT_END_LICENSE$
- **
- ****************************************************************************/
+**
+** Copyright (C) 2013 BlackBerry Limited. All rights reserved.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
 
 #include "qppsattribute_p.h"
 #include "qppsattributeprivate_p.h"
diff --git a/src/corelib/kernel/qppsattribute_p.h b/src/corelib/kernel/qppsattribute_p.h
index 035756e002..b59dcd5851 100644
--- a/src/corelib/kernel/qppsattribute_p.h
+++ b/src/corelib/kernel/qppsattribute_p.h
@@ -1,41 +1,42 @@
 /****************************************************************************
- **
- ** Copyright (C) 2013 BlackBerry Limited. All rights reserved.
- ** Contact: https://www.qt.io/licensing/
- **
- ** This file is part of the QtCore module of the Qt Toolkit.
- **
- ** $QT_BEGIN_LICENSE:LGPL$
- ** Commercial License Usage
- ** Licensees holding valid commercial Qt licenses may use this file in
- ** accordance with the commercial license agreement provided with the
- ** Software or, alternatively, in accordance with the terms contained in
- ** a written agreement between you and The Qt Company. For licensing terms
- ** and conditions see https://www.qt.io/terms-conditions. For further
- ** information use the contact form at https://www.qt.io/contact-us.
- **
- ** GNU Lesser General Public License Usage
- ** Alternatively, this file may be used under the terms of the GNU Lesser
- ** General Public License version 3 as published by the Free Software
- ** Foundation and appearing in the file LICENSE.LGPL3 included in the
- ** packaging of this file. Please review the following information to
- ** ensure the GNU Lesser General Public License version 3 requirements
- ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
- **
- ** GNU General Public License Usage
- ** Alternatively, this file may be used under the terms of the GNU
- ** General Public License version 2.0 or (at your option) the GNU General
- ** Public license version 3 or any later version approved by the KDE Free
- ** Qt Foundation. The licenses are as published by the Free Software
- ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
- ** included in the packaging of this file. Please review the following
- ** information to ensure the GNU General Public License requirements will
- ** be met: https://www.gnu.org/licenses/gpl-2.0.html and
- ** https://www.gnu.org/licenses/gpl-3.0.html.
- **
- ** $QT_END_LICENSE$
- **
- ****************************************************************************/
+**
+** Copyright (C) 2013 BlackBerry Limited. All rights reserved.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
 
 #ifndef QPPSATTRIBUTE_P_H
 #define QPPSATTRIBUTE_P_H
diff --git a/src/corelib/kernel/qppsattributeprivate_p.h b/src/corelib/kernel/qppsattributeprivate_p.h
index 6166447ef2..78b7b3c4c2 100644
--- a/src/corelib/kernel/qppsattributeprivate_p.h
+++ b/src/corelib/kernel/qppsattributeprivate_p.h
@@ -1,41 +1,41 @@
 /****************************************************************************
- **
- ** Copyright (C) 2013 BlackBerry Limited. All rights reserved.
- ** Contact: https://www.qt.io/licensing/
- **
- ** This file is part of the QtCore module of the Qt Toolkit.
- **
- ** $QT_BEGIN_LICENSE:LGPL$
- ** Commercial License Usage
- ** Licensees holding valid commercial Qt licenses may use this file in
- ** accordance with the commercial license agreement provided with the
- ** Software or, alternatively, in accordance with the terms contained in
- ** a written agreement between you and The Qt Company. For licensing terms
- ** and conditions see https://www.qt.io/terms-conditions. For further
- ** information use the contact form at https://www.qt.io/contact-us.
- **
- ** GNU Lesser General Public License Usage
- ** Alternatively, this file may be used under the terms of the GNU Lesser
- ** General Public License version 3 as published by the Free Software
- ** Foundation and appearing in the file LICENSE.LGPL3 included in the
- ** packaging of this file. Please review the following information to
- ** ensure the GNU Lesser General Public License version 3 requirements
- ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
- **
- ** GNU General Public License Usage
- ** Alternatively, this file may be used under the terms of the GNU
- ** General Public License version 2.0 or (at your option) the GNU General
- ** Public license version 3 or any later version approved by the KDE Free
- ** Qt Foundation. The licenses are as published by the Free Software
- ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
- ** included in the packaging of this file. Please review the following
- ** information to ensure the GNU General Public License requirements will
- ** be met: https://www.gnu.org/licenses/gpl-2.0.html and
- ** https://www.gnu.org/licenses/gpl-3.0.html.
- **
- ** $QT_END_LICENSE$
- **
- ****************************************************************************/
+**
+** Copyright (C) 2013 BlackBerry Limited. All rights reserved.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
 
 #ifndef QPPSATTRIBUTEPRIVATE_P_H
 #define QPPSATTRIBUTEPRIVATE_P_H
diff --git a/src/corelib/kernel/qppsobject.cpp b/src/corelib/kernel/qppsobject.cpp
index d58715d12b..f4001d3833 100644
--- a/src/corelib/kernel/qppsobject.cpp
+++ b/src/corelib/kernel/qppsobject.cpp
@@ -1,41 +1,41 @@
 /****************************************************************************
- **
- ** Copyright (C) 2013 BlackBerry Limited. All rights reserved.
- ** Contact: https://www.qt.io/licensing/
- **
- ** This file is part of the QtCore module of the Qt Toolkit.
- **
- ** $QT_BEGIN_LICENSE:LGPL$
- ** Commercial License Usage
- ** Licensees holding valid commercial Qt licenses may use this file in
- ** accordance with the commercial license agreement provided with the
- ** Software or, alternatively, in accordance with the terms contained in
- ** a written agreement between you and The Qt Company. For licensing terms
- ** and conditions see https://www.qt.io/terms-conditions. For further
- ** information use the contact form at https://www.qt.io/contact-us.
- **
- ** GNU Lesser General Public License Usage
- ** Alternatively, this file may be used under the terms of the GNU Lesser
- ** General Public License version 3 as published by the Free Software
- ** Foundation and appearing in the file LICENSE.LGPL3 included in the
- ** packaging of this file. Please review the following information to
- ** ensure the GNU Lesser General Public License version 3 requirements
- ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
- **
- ** GNU General Public License Usage
- ** Alternatively, this file may be used under the terms of the GNU
- ** General Public License version 2.0 or (at your option) the GNU General
- ** Public license version 3 or any later version approved by the KDE Free
- ** Qt Foundation. The licenses are as published by the Free Software
- ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
- ** included in the packaging of this file. Please review the following
- ** information to ensure the GNU General Public License requirements will
- ** be met: https://www.gnu.org/licenses/gpl-2.0.html and
- ** https://www.gnu.org/licenses/gpl-3.0.html.
- **
- ** $QT_END_LICENSE$
- **
- ****************************************************************************/
+**
+** Copyright (C) 2013 BlackBerry Limited. All rights reserved.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
 
 
 #include "qppsobject_p.h"
diff --git a/src/corelib/kernel/qppsobject_p.h b/src/corelib/kernel/qppsobject_p.h
index c7b99c8e42..abcf00fa05 100644
--- a/src/corelib/kernel/qppsobject_p.h
+++ b/src/corelib/kernel/qppsobject_p.h
@@ -1,41 +1,41 @@
 /****************************************************************************
- **
- ** Copyright (C) 2013 BlackBerry Limited. All rights reserved.
- ** Contact: https://www.qt.io/licensing/
- **
- ** This file is part of the QtCore module of the Qt Toolkit.
- **
- ** $QT_BEGIN_LICENSE:LGPL$
- ** Commercial License Usage
- ** Licensees holding valid commercial Qt licenses may use this file in
- ** accordance with the commercial license agreement provided with the
- ** Software or, alternatively, in accordance with the terms contained in
- ** a written agreement between you and The Qt Company. For licensing terms
- ** and conditions see https://www.qt.io/terms-conditions. For further
- ** information use the contact form at https://www.qt.io/contact-us.
- **
- ** GNU Lesser General Public License Usage
- ** Alternatively, this file may be used under the terms of the GNU Lesser
- ** General Public License version 3 as published by the Free Software
- ** Foundation and appearing in the file LICENSE.LGPL3 included in the
- ** packaging of this file. Please review the following information to
- ** ensure the GNU Lesser General Public License version 3 requirements
- ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
- **
- ** GNU General Public License Usage
- ** Alternatively, this file may be used under the terms of the GNU
- ** General Public License version 2.0 or (at your option) the GNU General
- ** Public license version 3 or any later version approved by the KDE Free
- ** Qt Foundation. The licenses are as published by the Free Software
- ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
- ** included in the packaging of this file. Please review the following
- ** information to ensure the GNU General Public License requirements will
- ** be met: https://www.gnu.org/licenses/gpl-2.0.html and
- ** https://www.gnu.org/licenses/gpl-3.0.html.
- **
- ** $QT_END_LICENSE$
- **
- ****************************************************************************/
+**
+** Copyright (C) 2013 BlackBerry Limited. All rights reserved.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
 
 #ifndef QPPSOBJECT_P_H
 #define QPPSOBJECT_P_H
diff --git a/src/corelib/kernel/qppsobjectprivate_p.h b/src/corelib/kernel/qppsobjectprivate_p.h
index dae44e3609..d6b4640832 100644
--- a/src/corelib/kernel/qppsobjectprivate_p.h
+++ b/src/corelib/kernel/qppsobjectprivate_p.h
@@ -1,41 +1,41 @@
 /****************************************************************************
- **
- ** Copyright (C) 2013 BlackBerry Limited. All rights reserved.
- ** Contact: https://www.qt.io/licensing/
- **
- ** This file is part of the QtCore module of the Qt Toolkit.
- **
- ** $QT_BEGIN_LICENSE:LGPL$
- ** Commercial License Usage
- ** Licensees holding valid commercial Qt licenses may use this file in
- ** accordance with the commercial license agreement provided with the
- ** Software or, alternatively, in accordance with the terms contained in
- ** a written agreement between you and The Qt Company. For licensing terms
- ** and conditions see https://www.qt.io/terms-conditions. For further
- ** information use the contact form at https://www.qt.io/contact-us.
- **
- ** GNU Lesser General Public License Usage
- ** Alternatively, this file may be used under the terms of the GNU Lesser
- ** General Public License version 3 as published by the Free Software
- ** Foundation and appearing in the file LICENSE.LGPL3 included in the
- ** packaging of this file. Please review the following information to
- ** ensure the GNU Lesser General Public License version 3 requirements
- ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
- **
- ** GNU General Public License Usage
- ** Alternatively, this file may be used under the terms of the GNU
- ** General Public License version 2.0 or (at your option) the GNU General
- ** Public license version 3 or any later version approved by the KDE Free
- ** Qt Foundation. The licenses are as published by the Free Software
- ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
- ** included in the packaging of this file. Please review the following
- ** information to ensure the GNU General Public License requirements will
- ** be met: https://www.gnu.org/licenses/gpl-2.0.html and
- ** https://www.gnu.org/licenses/gpl-3.0.html.
- **
- ** $QT_END_LICENSE$
- **
- ****************************************************************************/
+**
+** Copyright (C) 2013 BlackBerry Limited. All rights reserved.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtCore module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
 
 #ifndef QPPSOBJECTPRIVATE_P_H_
 #define QPPSOBJECTPRIVATE_P_H_
diff --git a/src/corelib/kernel/qtestsupport_core.cpp b/src/corelib/kernel/qtestsupport_core.cpp
index aba2a136a1..c54b933f94 100644
--- a/src/corelib/kernel/qtestsupport_core.cpp
+++ b/src/corelib/kernel/qtestsupport_core.cpp
@@ -3,7 +3,7 @@
 ** Copyright (C) 2018 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtTest module of the Qt Toolkit.
+** This file is part of the QtCore module of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:LGPL$
 ** Commercial License Usage
diff --git a/src/corelib/kernel/qtestsupport_core.h b/src/corelib/kernel/qtestsupport_core.h
index 7fc0054580..c8b664b6d3 100644
--- a/src/corelib/kernel/qtestsupport_core.h
+++ b/src/corelib/kernel/qtestsupport_core.h
@@ -3,7 +3,7 @@
 ** Copyright (C) 2018 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtTest module of the Qt Toolkit.
+** This file is part of the QtCore module of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:LGPL$
 ** Commercial License Usage
diff --git a/src/corelib/tools/qchar.cpp b/src/corelib/tools/qchar.cpp
index 94de69f075..47c853084b 100644
--- a/src/corelib/tools/qchar.cpp
+++ b/src/corelib/tools/qchar.cpp
@@ -652,7 +652,7 @@ QT_BEGIN_NAMESPACE
     Constructs a QChar corresponding to ASCII/Latin-1 character \a ch.
 
     \note This constructor is not available when \c QT_NO_CAST_FROM_ASCII
-    or QT_RESTRICTED_CAST_FROM_ASCII is defined.
+    or \c QT_RESTRICTED_CAST_FROM_ASCII is defined.
 
     \sa QT_NO_CAST_FROM_ASCII, QT_RESTRICTED_CAST_FROM_ASCII
 */
diff --git a/src/corelib/tools/qcollator.cpp b/src/corelib/tools/qcollator.cpp
index 1cf223aae6..76dcf35833 100644
--- a/src/corelib/tools/qcollator.cpp
+++ b/src/corelib/tools/qcollator.cpp
@@ -79,7 +79,6 @@ QT_BEGIN_NAMESPACE
 QCollator::QCollator(const QLocale &locale)
     : d(new QCollatorPrivate(locale))
 {
-    d->init();
 }
 
 /*!
@@ -223,11 +222,6 @@ Qt::CaseSensitivity QCollator::caseSensitivity() const
 
     By default this mode is off.
 
-    \note On Windows, this functionality makes use of the \l{ICU} library. If Qt was
-    compiled without ICU support, it falls back to code using native Windows API,
-    which only works from Windows 7 onwards. On older versions of Windows, it will not work
-    and a warning will be emitted at runtime.
-
     \sa numericMode()
  */
 void QCollator::setNumericMode(bool on)
@@ -323,6 +317,8 @@ bool QCollator::ignorePunctuation() const
     methods directly. But if the string is compared repeatedly (e.g. when sorting
     a whole list of strings), it's usually faster to create the sort keys for each
     string and then sort using the keys.
+
+    \note Not supported with the C (a.k.a. POSIX) locale on Darwin.
  */
 
 /*!
diff --git a/src/corelib/tools/qcollator_icu.cpp b/src/corelib/tools/qcollator_icu.cpp
index fd621983d3..ab45b9a1a1 100644
--- a/src/corelib/tools/qcollator_icu.cpp
+++ b/src/corelib/tools/qcollator_icu.cpp
@@ -55,6 +55,8 @@ QT_BEGIN_NAMESPACE
 void QCollatorPrivate::init()
 {
     cleanup();
+    if (isC())
+        return;
 
     UErrorCode status = U_ZERO_ERROR;
     QByteArray name = QLocalePrivate::get(locale)->bcp47Name('_');
@@ -140,6 +142,8 @@ QCollatorSortKey QCollator::sortKey(const QString &string) const
 {
     if (d->dirty)
         d->init();
+    if (d->isC())
+        return QCollatorSortKey(new QCollatorSortKeyPrivate(string.toUtf8()));
 
     if (d->collator) {
         QByteArray result(16 + string.size() + (string.size() >> 2), Qt::Uninitialized);
diff --git a/src/corelib/tools/qcollator_macx.cpp b/src/corelib/tools/qcollator_macx.cpp
index 9aa59a81dc..42e67e0c12 100644
--- a/src/corelib/tools/qcollator_macx.cpp
+++ b/src/corelib/tools/qcollator_macx.cpp
@@ -55,6 +55,15 @@ QT_BEGIN_NAMESPACE
 void QCollatorPrivate::init()
 {
     cleanup();
+    /*
+      LocaleRefFromLocaleString() will accept "POSIX" as the locale name, but
+      the locale it produces (named "pos") doesn't implement the [A-Z] < [a-z]
+      behavior we expect of the C locale.  We can use QStringView to get round
+      that for collation, but this leaves no way to do a sort key.
+    */
+    if (isC())
+        return;
+
     LocaleRef localeRef;
     int rc = LocaleRefFromLocaleString(QLocalePrivate::get(locale)->bcp47Name().constData(), &localeRef);
     if (rc != 0)
@@ -92,6 +101,8 @@ int QCollator::compare(const QChar *s1, int len1, const QChar *s2, int len2) con
 {
     if (d->dirty)
         d->init();
+    if (!d->collator)
+        return QStringView(s1, len1).compare(QStringView(s2, len2), caseSensitivity());
 
     SInt32 result;
     Boolean equivalent;
@@ -104,6 +115,7 @@ int QCollator::compare(const QChar *s1, int len1, const QChar *s2, int len2) con
         return 0;
     return result < 0 ? -1 : 1;
 }
+
 int QCollator::compare(const QString &str1, const QString &str2) const
 {
     return compare(str1.constData(), str1.size(), str2.constData(), str2.size());
@@ -118,6 +130,11 @@ QCollatorSortKey QCollator::sortKey(const QString &string) const
 {
     if (d->dirty)
         d->init();
+    if (!d->collator) {
+        // What should (or even *can*) we do here ? (See init()'s comment.)
+        qWarning("QCollator doesn't support sort keys for the C locale on Darwin");
+        return QCollatorSortKey(nullptr);
+    }
 
     //Documentation recommends having it 5 times as big as the input
     QVector<UCCollationValue> ret(string.size() * 5);
@@ -136,6 +153,9 @@ QCollatorSortKey QCollator::sortKey(const QString &string) const
 
 int QCollatorSortKey::compare(const QCollatorSortKey &key) const
 {
+    if (!d.data())
+        return 0;
+
     SInt32 order;
     UCCompareCollationKeys(d->m_key.data(), d->m_key.size(),
                            key.d->m_key.data(), key.d->m_key.size(),
diff --git a/src/corelib/tools/qcollator_p.h b/src/corelib/tools/qcollator_p.h
index e89c08447c..361c3fb987 100644
--- a/src/corelib/tools/qcollator_p.h
+++ b/src/corelib/tools/qcollator_p.h
@@ -110,6 +110,7 @@ public:
 
     QCollatorPrivate(const QLocale &locale) : locale(locale) {}
     ~QCollatorPrivate() { cleanup(); }
+    bool isC() { return locale.language() == QLocale::C; }
 
     void clear() {
         cleanup();
diff --git a/src/corelib/tools/qcollator_posix.cpp b/src/corelib/tools/qcollator_posix.cpp
index 42413a4a82..81f97a02e1 100644
--- a/src/corelib/tools/qcollator_posix.cpp
+++ b/src/corelib/tools/qcollator_posix.cpp
@@ -48,10 +48,12 @@ QT_BEGIN_NAMESPACE
 
 void QCollatorPrivate::init()
 {
-    if (locale != QLocale())
-        qWarning("Only default locale supported with the posix collation implementation");
-    if (caseSensitivity != Qt::CaseSensitive)
-        qWarning("Case insensitive sorting unsupported in the posix collation implementation");
+    if (!isC()) {
+        if (locale != QLocale())
+            qWarning("Only C and default locale supported with the posix collation implementation");
+        if (caseSensitivity != Qt::CaseSensitive)
+            qWarning("Case insensitive sorting unsupported in the posix collation implementation");
+    }
     if (numericMode)
         qWarning("Numeric mode unsupported in the posix collation implementation");
     if (ignorePunctuation)
@@ -73,14 +75,16 @@ static void stringToWCharArray(QVarLengthArray<wchar_t> &ret, const QString &str
 
 int QCollator::compare(const QChar *s1, int len1, const QChar *s2, int len2) const
 {
-    QVarLengthArray<wchar_t> array1, array2;
-    stringToWCharArray(array1, QString(s1, len1));
-    stringToWCharArray(array2, QString(s2, len2));
-    return std::wcscoll(array1.constData(), array2.constData());
+    return compare(QString::fromRawData(s1, len1), QString::fromRawData(s2, len2));
 }
 
 int QCollator::compare(const QString &s1, const QString &s2) const
 {
+    if (d->isC())
+        return s1.compare(s2, caseSensitivity());
+    if (d->dirty)
+        d->init();
+
     QVarLengthArray<wchar_t> array1, array2;
     stringToWCharArray(array1, s1);
     stringToWCharArray(array2, s2);
@@ -89,10 +93,7 @@ int QCollator::compare(const QString &s1, const QString &s2) const
 
 int QCollator::compare(const QStringRef &s1, const QStringRef &s2) const
 {
-    if (d->dirty)
-        d->init();
-
-    return compare(s1.constData(), s1.size(), s2.constData(), s2.size());
+    return compare(s1.toString(), s2.toString());
 }
 
 QCollatorSortKey QCollator::sortKey(const QString &string) const
@@ -102,14 +103,18 @@ QCollatorSortKey QCollator::sortKey(const QString &string) const
 
     QVarLengthArray<wchar_t> original;
     stringToWCharArray(original, string);
-    QVector<wchar_t> result(string.size());
-    size_t size = std::wcsxfrm(result.data(), original.constData(), string.size());
-    if (size > uint(result.size())) {
+    QVector<wchar_t> result(original.size());
+    if (d->isC()) {
+        std::copy(original.cbegin(), original.cend(), result.begin());
+    } else {
+        size_t size = std::wcsxfrm(result.data(), original.constData(), string.size());
+        if (size > uint(result.size())) {
+            result.resize(size+1);
+            size = std::wcsxfrm(result.data(), original.constData(), string.size());
+        }
         result.resize(size+1);
-        size = std::wcsxfrm(result.data(), original.constData(), string.size());
+        result[size] = 0;
     }
-    result.resize(size+1);
-    result[size] = 0;
     return QCollatorSortKey(new QCollatorSortKeyPrivate(std::move(result)));
 }
 
diff --git a/src/corelib/tools/qcollator_win.cpp b/src/corelib/tools/qcollator_win.cpp
index 5a838c1b50..35142bb8b8 100644
--- a/src/corelib/tools/qcollator_win.cpp
+++ b/src/corelib/tools/qcollator_win.cpp
@@ -60,6 +60,8 @@ extern LCID qt_inIsoNametoLCID(const char *name);
 void QCollatorPrivate::init()
 {
     collator = 0;
+    if (isC())
+        return;
 
 #ifndef USE_COMPARESTRINGEX
     localeID = qt_inIsoNametoLCID(QLocalePrivate::get(locale)->bcp47Name().constData());
@@ -86,6 +88,9 @@ void QCollatorPrivate::cleanup()
 
 int QCollator::compare(const QChar *s1, int len1, const QChar *s2, int len2) const
 {
+    if (d->isC())
+        return QString::compare_helper(s1, len1, s2, len2, d->caseSensitivity);
+
     if (d->dirty)
         d->init();
 
@@ -119,6 +124,8 @@ QCollatorSortKey QCollator::sortKey(const QString &string) const
 {
     if (d->dirty)
         d->init();
+    if (d->isC())
+        return QCollatorSortKey(new QCollatorSortKeyPrivate(string));
 
 #ifndef USE_COMPARESTRINGEX
     int size = LCMapStringW(d->localeID, LCMAP_SORTKEY | d->collator,
diff --git a/src/corelib/tools/qregularexpression.cpp b/src/corelib/tools/qregularexpression.cpp
index 908e7ff0d6..bdaa2d3243 100644
--- a/src/corelib/tools/qregularexpression.cpp
+++ b/src/corelib/tools/qregularexpression.cpp
@@ -1992,7 +1992,7 @@ QString QRegularExpression::wildcardToRegularExpression(const QString &pattern)
         }
     }
 
-    return rx;
+    return anchoredPattern(rx);
 }
 
 /*!
@@ -2138,6 +2138,9 @@ int QRegularExpressionMatch::lastCapturedIndex() const
     If the \a nth capturing group did not capture a string, or if there is no
     such capturing group, returns a null QString.
 
+    \note The implicit capturing group number 0 captures the substring matched
+    by the entire pattern.
+
     \sa capturedRef(), capturedView(), lastCapturedIndex(), capturedStart(), capturedEnd(),
     capturedLength(), QString::isNull()
 */
@@ -2160,6 +2163,9 @@ QString QRegularExpressionMatch::captured(int nth) const
     If the \a nth capturing group did not capture a string, or if there is no
     such capturing group, returns a null QStringRef.
 
+    \note The implicit capturing group number 0 captures the substring matched
+    by the entire pattern.
+
     \sa captured(), capturedView(), lastCapturedIndex(), capturedStart(), capturedEnd(),
     capturedLength(), QStringRef::isNull()
 */
@@ -2184,6 +2190,9 @@ QStringRef QRegularExpressionMatch::capturedRef(int nth) const
     If the \a nth capturing group did not capture a string, or if there is no
     such capturing group, returns a null QStringView.
 
+    \note The implicit capturing group number 0 captures the substring matched
+    by the entire pattern.
+
     \sa captured(), capturedRef(), lastCapturedIndex(), capturedStart(), capturedEnd(),
     capturedLength(), QStringView::isNull()
 */
@@ -2296,7 +2305,9 @@ QStringView QRegularExpressionMatch::capturedView(QStringView name) const
 
 /*!
     Returns a list of all strings captured by capturing groups, in the order
-    the groups themselves appear in the pattern string.
+    the groups themselves appear in the pattern string. The list includes the
+    implicit capturing group number 0, capturing the substring matched by the
+    entire pattern.
 */
 QStringList QRegularExpressionMatch::capturedTexts() const
 {
diff --git a/src/corelib/tools/qstring.cpp b/src/corelib/tools/qstring.cpp
index d20c46774d..63d44eb39c 100644
--- a/src/corelib/tools/qstring.cpp
+++ b/src/corelib/tools/qstring.cpp
@@ -265,16 +265,46 @@ const ushort *QtPrivate::qustrchr(QStringView str, ushort c) noexcept
     const ushort *e = reinterpret_cast<const ushort *>(str.end());
 
 #ifdef __SSE2__
+    bool loops = true;
+    // Using the PMOVMSKB instruction, we get two bits for each character
+    // we compare.
+#  if defined(__AVX2__) && !defined(__OPTIMIZE_SIZE__)
+    // we're going to read n[0..15] (32 bytes)
+    __m256i mch256 = _mm256_set1_epi32(c | (c << 16));
+    for (const ushort *next = n + 16; next <= e; n = next, next += 16) {
+        __m256i data = _mm256_loadu_si256(reinterpret_cast<const __m256i *>(n));
+        __m256i result = _mm256_cmpeq_epi16(data, mch256);
+        uint mask = uint(_mm256_movemask_epi8(result));
+        if (mask) {
+            uint idx = qCountTrailingZeroBits(mask);
+            return n + idx / 2;
+        }
+    }
+    loops = false;
+    __m128i mch = _mm256_castsi256_si128(mch256);
+#  else
     __m128i mch = _mm_set1_epi32(c | (c << 16));
+#  endif
+
+    auto hasMatch = [mch, &n](__m128i data, ushort validityMask) {
+        __m128i result = _mm_cmpeq_epi16(data, mch);
+        uint mask = uint(_mm_movemask_epi8(result));
+        if ((mask & validityMask) == 0)
+            return false;
+        uint idx = qCountTrailingZeroBits(mask);
+        n += idx / 2;
+        return true;
+    };
 
     // we're going to read n[0..7] (16 bytes)
     for (const ushort *next = n + 8; next <= e; n = next, next += 8) {
         __m128i data = _mm_loadu_si128(reinterpret_cast<const __m128i *>(n));
-        __m128i result = _mm_cmpeq_epi16(data, mch);
-        uint mask = _mm_movemask_epi8(result);
-        if (ushort(mask)) {
-            // found a match
-            return n + (qCountTrailingZeroBits(mask) >> 1);
+        if (hasMatch(data, 0xffff))
+            return n;
+
+        if (!loops) {
+            n += 8;
+            break;
         }
     }
 
@@ -282,12 +312,8 @@ const ushort *QtPrivate::qustrchr(QStringView str, ushort c) noexcept
     // we're going to read n[0..3] (8 bytes)
     if (e - n > 3) {
         __m128i data = _mm_loadl_epi64(reinterpret_cast<const __m128i *>(n));
-        __m128i result = _mm_cmpeq_epi16(data, mch);
-        uint mask = _mm_movemask_epi8(result);
-        if (uchar(mask)) {
-            // found a match
-            return n + (qCountTrailingZeroBits(mask) >> 1);
-        }
+        if (hasMatch(data, 0xff))
+            return n;
 
         n += 4;
     }
@@ -874,6 +900,19 @@ static int ucstrncmp(const QChar *a, const QChar *b, size_t l)
     const QChar *end = a + l;
     qptrdiff offset = 0;
 
+    // Using the PMOVMSKB instruction, we get two bits for each character
+    // we compare.
+    int retval;
+    auto isDifferent = [a, b, &offset, &retval](__m128i a_data, __m128i b_data) {
+        __m128i result = _mm_cmpeq_epi16(a_data, b_data);
+        uint mask = ~uint(_mm_movemask_epi8(result));
+        if (ushort(mask) == 0)
+            return false;
+        uint idx = qCountTrailingZeroBits(mask);
+        retval = a[offset + idx / 2].unicode() - b[offset + idx / 2].unicode();
+        return true;
+    };
+
     // we're going to read a[0..15] and b[0..15] (32 bytes)
     for ( ; a + offset + 16 <= end; offset += 16) {
 #ifdef __AVX2__
@@ -902,13 +941,8 @@ static int ucstrncmp(const QChar *a, const QChar *b, size_t l)
     if (a + offset + 8 <= end) {
         __m128i a_data = _mm_loadu_si128(reinterpret_cast<const __m128i *>(a + offset));
         __m128i b_data = _mm_loadu_si128(reinterpret_cast<const __m128i *>(b + offset));
-        __m128i result = _mm_cmpeq_epi16(a_data, b_data);
-        uint mask = ~_mm_movemask_epi8(result);
-        if (ushort(mask)) {
-            // found a different character
-            uint idx = qCountTrailingZeroBits(mask);
-            return a[offset + idx / 2].unicode() - b[offset + idx / 2].unicode();
-        }
+        if (isDifferent(a_data, b_data))
+            return retval;
 
         offset += 8;
     }
@@ -917,13 +951,8 @@ static int ucstrncmp(const QChar *a, const QChar *b, size_t l)
     if (a + offset + 4 <= end) {
         __m128i a_data = _mm_loadl_epi64(reinterpret_cast<const __m128i *>(a + offset));
         __m128i b_data = _mm_loadl_epi64(reinterpret_cast<const __m128i *>(b + offset));
-        __m128i result = _mm_cmpeq_epi16(a_data, b_data);
-        uint mask = ~_mm_movemask_epi8(result);
-        if (uchar(mask)) {
-            // found a different character
-            uint idx = qCountTrailingZeroBits(mask);
-            return a[offset + idx / 2].unicode() - b[offset + idx / 2].unicode();
-        }
+        if (isDifferent(a_data, b_data))
+            return retval;
 
         offset += 4;
     }
@@ -1018,6 +1047,19 @@ static int ucstrncmp(const QChar *a, const uchar *c, size_t l)
     __m128i nullmask = _mm_setzero_si128();
     qptrdiff offset = 0;
 
+    // Using the PMOVMSKB instruction, we get two bits for each character
+    // we compare.
+    int retval;
+    auto isDifferent = [uc, c, &offset, &retval](__m128i a_data, __m128i b_data) {
+        __m128i result = _mm_cmpeq_epi16(a_data, b_data);
+        uint mask = ~uint(_mm_movemask_epi8(result));
+        if (ushort(mask) == 0)
+            return false;
+        uint idx = qCountTrailingZeroBits(mask);
+        retval = uc[offset + idx / 2] - c[offset + idx / 2];
+        return true;
+    };
+
     // we're going to read uc[offset..offset+15] (32 bytes)
     // and c[offset..offset+15] (16 bytes)
     for ( ; uc + offset + 15 < e; offset += 16) {
@@ -1061,13 +1103,8 @@ static int ucstrncmp(const QChar *a, const uchar *c, size_t l)
         __m128i secondHalf = mm_load8_zero_extend(c + offset);
 
         __m128i ucdata = _mm_loadu_si128((const __m128i*)(uc + offset));
-        __m128i result = _mm_cmpeq_epi16(secondHalf, ucdata);
-        uint mask = ~_mm_movemask_epi8(result);
-        if (ushort(mask)) {
-            // found a different character
-            uint idx = qCountTrailingZeroBits(mask);
-            return uc[offset + idx / 2] - c[offset + idx / 2];
-        }
+        if (isDifferent(ucdata, secondHalf))
+            return retval;
 
         // still matched
         offset += 8;
@@ -1080,13 +1117,8 @@ static int ucstrncmp(const QChar *a, const uchar *c, size_t l)
         __m128i secondHalf = _mm_unpacklo_epi8(chunk, nullmask);
 
         __m128i ucdata = _mm_loadl_epi64(reinterpret_cast<const __m128i *>(uc + offset));
-        __m128i result = _mm_cmpeq_epi8(secondHalf, ucdata);
-        uint mask = ~_mm_movemask_epi8(result);
-        if (uchar(mask)) {
-            // found a different character
-            uint idx = qCountTrailingZeroBits(mask);
-            return uc[offset + idx / 2] - c[offset + idx / 2];
-        }
+        if (isDifferent(ucdata, secondHalf))
+            return retval;
 
         // still matched
         offset += 4;
@@ -1318,7 +1350,7 @@ const QString::Null QString::null = { };
   literals and 8-bit data to unicode QStrings, but allows the use of
   the \c{QChar(char)} and \c{QString(const char (&ch)[N]} constructors,
   and the \c{QString::operator=(const char (&ch)[N])} assignment operator
-  giving most of the type-safety benefits of QT_NO_CAST_FROM_ASCII
+  giving most of the type-safety benefits of \c QT_NO_CAST_FROM_ASCII
   but does not require user code to wrap character and string literals
   with QLatin1Char, QLatin1String or similar.
 
@@ -1973,13 +2005,13 @@ const QString::Null QString::null = { };
     can be useful if you want to ensure that all user-visible strings
     go through QObject::tr(), for example.
 
-    \note Defining QT_RESTRICTED_CAST_FROM_ASCII also disables
+    \note Defining \c QT_RESTRICTED_CAST_FROM_ASCII also disables
     this constructor, but enables a \c{QString(const char (&ch)[N])}
     constructor instead. Using non-literal input, or input with
     embedded NUL characters, or non-7-bit characters is undefined
     in this case.
 
-    \sa fromLatin1(), fromLocal8Bit(), fromUtf8()
+    \sa fromLatin1(), fromLocal8Bit(), fromUtf8(), QT_NO_CAST_FROM_ASCII, QT_RESTRICTED_CAST_FROM_ASCII
 */
 
 /*! \fn QString QString::fromStdString(const std::string &str)
@@ -2172,7 +2204,7 @@ QString::QString(QChar ch)
     can be useful if you want to ensure that all user-visible strings
     go through QObject::tr(), for example.
 
-    \sa fromLatin1(), fromLocal8Bit(), fromUtf8()
+    \sa fromLatin1(), fromLocal8Bit(), fromUtf8(), QT_NO_CAST_FROM_ASCII
 */
 
 /*! \fn QString::QString(const Null &)
@@ -2420,6 +2452,8 @@ QString &QString::operator=(QLatin1String other)
     QT_NO_CAST_FROM_ASCII when you compile your applications. This
     can be useful if you want to ensure that all user-visible strings
     go through QObject::tr(), for example.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*! \fn QString &QString::operator=(const char *str)
@@ -2434,6 +2468,7 @@ QString &QString::operator=(QLatin1String other)
     This can be useful if you want to ensure that all user-visible strings
     go through QObject::tr(), for example.
 
+    \sa QT_NO_CAST_FROM_ASCII, QT_RESTRICTED_CAST_FROM_ASCII
 */
 
 /*! \fn QString &QString::operator=(char ch)
@@ -2448,6 +2483,8 @@ QString &QString::operator=(QLatin1String other)
     QT_NO_CAST_FROM_ASCII when you compile your applications. This
     can be useful if you want to ensure that all user-visible strings
     go through QObject::tr(), for example.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*!
@@ -2510,8 +2547,10 @@ QString &QString::operator=(QChar ch)
     If the given \a position is greater than size(), the array is
     first extended using resize().
 
-    This function is not available when QT_NO_CAST_FROM_ASCII is
+    This function is not available when \c QT_NO_CAST_FROM_ASCII is
     defined.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 
@@ -2526,8 +2565,10 @@ QString &QString::operator=(QChar ch)
     If the given \a position is greater than size(), the array is
     first extended using resize().
 
-    This function is not available when QT_NO_CAST_FROM_ASCII is
+    This function is not available when \c QT_NO_CAST_FROM_ASCII is
     defined.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 
@@ -2692,6 +2733,8 @@ QString &QString::append(QLatin1String str)
     when you compile your applications. This can be useful if you want
     to ensure that all user-visible strings go through QObject::tr(),
     for example.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*! \fn QString &QString::append(const char *str)
@@ -2705,6 +2748,8 @@ QString &QString::append(QLatin1String str)
     when you compile your applications. This can be useful if you want
     to ensure that all user-visible strings go through QObject::tr(),
     for example.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*!
@@ -2767,6 +2812,8 @@ QString &QString::append(QChar ch)
     QT_NO_CAST_FROM_ASCII when you compile your applications. This
     can be useful if you want to ensure that all user-visible strings
     go through QObject::tr(), for example.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*! \fn QString &QString::prepend(const char *str)
@@ -2780,6 +2827,8 @@ QString &QString::append(QChar ch)
     QT_NO_CAST_FROM_ASCII when you compile your applications. This
     can be useful if you want to ensure that all user-visible strings
     go through QObject::tr(), for example.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*! \fn QString &QString::prepend(QChar ch)
@@ -3378,6 +3427,8 @@ bool QString::operator==(QLatin1String other) const Q_DECL_NOTHROW
 
     Returns \c true if this string is lexically equal to the parameter
     string \a other. Otherwise returns \c false.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*! \fn bool QString::operator==(const char *other) const
@@ -3391,6 +3442,8 @@ bool QString::operator==(QLatin1String other) const Q_DECL_NOTHROW
     QT_NO_CAST_FROM_ASCII when you compile your applications. This
     can be useful if you want to ensure that all user-visible strings
     go through QObject::tr(), for example.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*!
@@ -3431,6 +3484,8 @@ bool QString::operator<(QLatin1String other) const Q_DECL_NOTHROW
     QT_NO_CAST_FROM_ASCII when you compile your applications. This
     can be useful if you want to ensure that all user-visible strings
     go through QObject::tr(), for example.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*! \fn bool QString::operator<(const char *other) const
@@ -3447,6 +3502,8 @@ bool QString::operator<(QLatin1String other) const Q_DECL_NOTHROW
     QT_NO_CAST_FROM_ASCII when you compile your applications. This
     can be useful if you want to ensure that all user-visible strings
     go through QObject::tr(), for example.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*! \fn bool operator<=(const QString &s1, const QString &s2)
@@ -3482,6 +3539,8 @@ bool QString::operator<(QLatin1String other) const Q_DECL_NOTHROW
     QT_NO_CAST_FROM_ASCII when you compile your applications. This
     can be useful if you want to ensure that all user-visible strings
     go through QObject::tr(), for example.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*! \fn bool QString::operator<=(const char *other) const
@@ -3495,6 +3554,8 @@ bool QString::operator<(QLatin1String other) const Q_DECL_NOTHROW
     QT_NO_CAST_FROM_ASCII when you compile your applications. This
     can be useful if you want to ensure that all user-visible strings
     go through QObject::tr(), for example.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*! \fn bool operator>(const QString &s1, const QString &s2)
@@ -3532,6 +3593,8 @@ bool QString::operator>(QLatin1String other) const Q_DECL_NOTHROW
     QT_NO_CAST_FROM_ASCII when you compile your applications. This
     can be useful if you want to ensure that all user-visible strings
     go through QObject::tr(), for example.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*! \fn bool QString::operator>(const char *other) const
@@ -3545,6 +3608,8 @@ bool QString::operator>(QLatin1String other) const Q_DECL_NOTHROW
     when you compile your applications. This can be useful if you want
     to ensure that all user-visible strings go through QObject::tr(),
     for example.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*! \fn bool operator>=(const QString &s1, const QString &s2)
@@ -3579,6 +3644,8 @@ bool QString::operator>(QLatin1String other) const Q_DECL_NOTHROW
     when you compile your applications. This can be useful if you want
     to ensure that all user-visible strings go through QObject::tr(),
     for example.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*! \fn bool QString::operator>=(const char *other) const
@@ -3592,6 +3659,8 @@ bool QString::operator>(QLatin1String other) const Q_DECL_NOTHROW
     when you compile your applications. This can be useful if you want
     to ensure that all user-visible strings go through QObject::tr(),
     for example.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*! \fn bool operator!=(const QString &s1, const QString &s2)
@@ -3626,6 +3695,8 @@ bool QString::operator>(QLatin1String other) const Q_DECL_NOTHROW
     when you compile your applications. This can be useful if you want
     to ensure that all user-visible strings go through QObject::tr(),
     for example.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*! \fn bool QString::operator!=(const char *other) const
@@ -3639,6 +3710,8 @@ bool QString::operator>(QLatin1String other) const Q_DECL_NOTHROW
     QT_NO_CAST_FROM_ASCII when you compile your applications. This
     can be useful if you want to ensure that all user-visible strings
     go through QObject::tr(), for example.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*!
@@ -6032,6 +6105,8 @@ QString& QString::fill(QChar ch, int size)
     QT_NO_CAST_FROM_ASCII when you compile your applications. This
     can be useful if you want to ensure that all user-visible strings
     go through QObject::tr(), for example.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*! \fn QString &QString::operator+=(const char *str)
@@ -6045,6 +6120,8 @@ QString& QString::fill(QChar ch, int size)
     when you compile your applications. This can be useful if you want
     to ensure that all user-visible strings go through QObject::tr(),
     for example.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*! \fn QString &QString::operator+=(const QStringRef &str)
@@ -6066,6 +6143,8 @@ QString& QString::fill(QChar ch, int size)
     when you compile your applications. This can be useful if you want
     to ensure that all user-visible strings go through QObject::tr(),
     for example.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*! \fn QString &QString::operator+=(QChar ch)
@@ -9243,7 +9322,7 @@ QString &QString::setRawData(const QChar *unicode, int size)
     in the first place. In those cases, using QStringLiteral may be
     the better option.
 
-    \sa QString, QLatin1Char, {QStringLiteral()}{QStringLiteral}
+    \sa QString, QLatin1Char, {QStringLiteral()}{QStringLiteral}, QT_NO_CAST_FROM_ASCII
 */
 
 /*!
@@ -9720,6 +9799,8 @@ QString &QString::setRawData(const QChar *unicode, int size)
     QT_NO_CAST_FROM_ASCII when you compile your applications. This
     can be useful if you want to ensure that all user-visible strings
     go through QObject::tr(), for example.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*!
@@ -9734,6 +9815,8 @@ QString &QString::setRawData(const QChar *unicode, int size)
     QT_NO_CAST_FROM_ASCII when you compile your applications. This
     can be useful if you want to ensure that all user-visible strings
     go through QObject::tr(), for example.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*! \fn bool QLatin1String::operator!=(const QString &other) const
@@ -9759,6 +9842,8 @@ QString &QString::setRawData(const QChar *unicode, int size)
     QT_NO_CAST_FROM_ASCII when you compile your applications. This
     can be useful if you want to ensure that all user-visible strings
     go through QObject::tr(), for example.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*!
@@ -9773,6 +9858,8 @@ QString &QString::setRawData(const QChar *unicode, int size)
     QT_NO_CAST_FROM_ASCII when you compile your applications. This
     can be useful if you want to ensure that all user-visible strings
     go through QObject::tr(), for example.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*!
@@ -9799,6 +9886,8 @@ QString &QString::setRawData(const QChar *unicode, int size)
     when you compile your applications. This can be useful if you want
     to ensure that all user-visible strings go through QObject::tr(),
     for example.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*!
@@ -9813,6 +9902,8 @@ QString &QString::setRawData(const QChar *unicode, int size)
     when you compile your applications. This can be useful if you want
     to ensure that all user-visible strings go through QObject::tr(),
     for example.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*!
@@ -9839,6 +9930,8 @@ QString &QString::setRawData(const QChar *unicode, int size)
     QT_NO_CAST_FROM_ASCII when you compile your applications. This
     can be useful if you want to ensure that all user-visible strings
     go through QObject::tr(), for example.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*!
@@ -9853,6 +9946,8 @@ QString &QString::setRawData(const QChar *unicode, int size)
     QT_NO_CAST_FROM_ASCII when you compile your applications. This
     can be useful if you want to ensure that all user-visible strings
     go through QObject::tr(), for example.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*!
@@ -9879,6 +9974,8 @@ QString &QString::setRawData(const QChar *unicode, int size)
     QT_NO_CAST_FROM_ASCII when you compile your applications. This
     can be useful if you want to ensure that all user-visible strings
     go through QObject::tr(), for example.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*!
@@ -9893,6 +9990,8 @@ QString &QString::setRawData(const QChar *unicode, int size)
     QT_NO_CAST_FROM_ASCII when you compile your applications. This
     can be useful if you want to ensure that all user-visible strings
     go through QObject::tr(), for example.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*! \fn bool QLatin1String::operator<=(const QString &other) const
@@ -9918,6 +10017,8 @@ QString &QString::setRawData(const QChar *unicode, int size)
     QT_NO_CAST_FROM_ASCII when you compile your applications. This
     can be useful if you want to ensure that all user-visible strings
     go through QObject::tr(), for example.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*!
@@ -9932,6 +10033,8 @@ QString &QString::setRawData(const QChar *unicode, int size)
     QT_NO_CAST_FROM_ASCII when you compile your applications. This
     can be useful if you want to ensure that all user-visible strings
     go through QObject::tr(), for example.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 
@@ -10560,6 +10663,7 @@ bool operator<(const QStringRef &s1,const QStringRef &s2) Q_DECL_NOTHROW
     Returns \c true if this string is lexically equal to the parameter
     string \a s. Otherwise returns \c false.
 
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*!
@@ -10577,6 +10681,8 @@ bool operator<(const QStringRef &s1,const QStringRef &s2) Q_DECL_NOTHROW
 
     Returns \c true if this string is not lexically equal to the parameter
     string \a s. Otherwise returns \c false.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*!
@@ -10594,6 +10700,8 @@ bool operator<(const QStringRef &s1,const QStringRef &s2) Q_DECL_NOTHROW
 
     Returns \c true if this string is lexically smaller than the parameter
     string \a s. Otherwise returns \c false.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*!
@@ -10611,6 +10719,8 @@ bool operator<(const QStringRef &s1,const QStringRef &s2) Q_DECL_NOTHROW
 
     Returns \c true if this string is lexically smaller than or equal to the parameter
     string \a s. Otherwise returns \c false.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*!
@@ -10629,6 +10739,8 @@ bool operator<(const QStringRef &s1,const QStringRef &s2) Q_DECL_NOTHROW
 
     Returns \c true if this string is lexically greater than the parameter
     string \a s. Otherwise returns \c false.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 
 /*!
@@ -10646,6 +10758,8 @@ bool operator<(const QStringRef &s1,const QStringRef &s2) Q_DECL_NOTHROW
 
     Returns \c true if this string is lexically greater than or equal to the
     parameter string \a s. Otherwise returns \c false.
+
+    \sa QT_NO_CAST_FROM_ASCII
 */
 /*!
     \typedef QString::Data
diff --git a/src/corelib/tools/qstring_mips_dsp_asm.S b/src/corelib/tools/qstring_mips_dsp_asm.S
index faf90e14be..202f322310 100644
--- a/src/corelib/tools/qstring_mips_dsp_asm.S
+++ b/src/corelib/tools/qstring_mips_dsp_asm.S
@@ -3,7 +3,7 @@
 ** Copyright (C) 2013 Imagination Technologies Limited, www.imgtec.com
 ** Contact: https://www.qt.io/licensing/
 **
-** This file is part of the QtGui module of the Qt Toolkit.
+** This file is part of the QtCore module of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:LGPL$
 ** Commercial License Usage
diff --git a/src/corelib/tools/qstringbuilder.cpp b/src/corelib/tools/qstringbuilder.cpp
index 081d7136a7..8afc83819b 100644
--- a/src/corelib/tools/qstringbuilder.cpp
+++ b/src/corelib/tools/qstringbuilder.cpp
@@ -80,7 +80,7 @@ QT_BEGIN_NAMESPACE
     \endlist
 
     The types in the last list point are only available when
-    QT_NO_CAST_FROM_ASCII is not defined.
+    \c QT_NO_CAST_FROM_ASCII is not defined.
 
     For building QByteArrays: