From d6fccc69f39def255ec5d1ea36c37c49273c23b1 Mon Sep 17 00:00:00 2001
From: Giuseppe D'Angelo <dangelog@gmail.com>
Date: Mon, 23 Jan 2012 22:31:13 +0000
Subject: QRegularExpression: configure support for PCRE

Added PCRE config.tests, and logic and command line options
(-qt-pcre and -system-pcre) for configure and configure.exe.

Change-Id: I5da2658191198dbcf48c07d7c5de1be1b884a7a5
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>
---
 config.tests/unix/pcre/pcre.cpp  | 51 ++++++++++++++++++++++++++++++++++++++++
 config.tests/unix/pcre/pcre.pro  |  3 +++
 configure                        | 34 +++++++++++++++++++++++++++
 tools/configure/configureapp.cpp | 27 +++++++++++++++++++--
 4 files changed, 113 insertions(+), 2 deletions(-)
 create mode 100644 config.tests/unix/pcre/pcre.cpp
 create mode 100644 config.tests/unix/pcre/pcre.pro

diff --git a/config.tests/unix/pcre/pcre.cpp b/config.tests/unix/pcre/pcre.cpp
new file mode 100644
index 0000000000..9bdef6da5c
--- /dev/null
+++ b/config.tests/unix/pcre/pcre.cpp
@@ -0,0 +1,51 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Giuseppe D'Angelo <dangelog@gmail.com>.
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the config.tests of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** This file may be used under the terms of the GNU Lesser General Public
+** License version 2.1 as published by the Free Software Foundation and
+** appearing in the file LICENSE.LGPL included in the packaging of this
+** file. Please review the following information to ensure the GNU Lesser
+** General Public License version 2.1 requirements will be met:
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 as published by the Free Software Foundation
+** and appearing in the file LICENSE.GPL included in the packaging of this
+** file. Please review the following information to ensure the GNU General
+** Public License version 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <pcre.h>
+
+#if (PCRE_MAJOR < 8) || ((PCRE_MAJOR == 8) && (PCRE_MINOR < 30))
+#error This PCRE version is not supported
+#endif
+
+int main(int, char **)
+{
+    return 0;
+}
+
diff --git a/config.tests/unix/pcre/pcre.pro b/config.tests/unix/pcre/pcre.pro
new file mode 100644
index 0000000000..b29c55da47
--- /dev/null
+++ b/config.tests/unix/pcre/pcre.pro
@@ -0,0 +1,3 @@
+SOURCES = pcre.cpp
+CONFIG -= qt dylib app_bundle
+LIBS += -lpcre16
diff --git a/configure b/configure
index fe07f8cc70..4a4ef6d812 100755
--- a/configure
+++ b/configure
@@ -814,6 +814,7 @@ CFG_COREWLAN=auto
 CFG_NOPROCESS=no
 CFG_ICU=auto
 CFG_FORCE_ASSERTS=no
+CFG_PCRE=auto
 
 # initalize variables used for installation
 QT_INSTALL_PREFIX=
@@ -2317,6 +2318,13 @@ while [ "$#" -gt 0 ]; do
             UNKNOWN_OPT=yes
         fi
         ;;
+    pcre)
+        if [ "$VAL" = "qt" ] || [ "$VAL" = "system" ]; then
+            CFG_PCRE="$VAL"
+        else
+            UNKNOWN_OPT=yes
+        fi
+        ;;
     *)
         UNKNOWN_OPT=yes
         ;;
@@ -3559,6 +3567,7 @@ Usage:  $relconf [-h] [-prefix <dir>] [-prefix-install] [-bindir <dir>] [-libdir
         [-no-script] [-script] [-no-scripttools] [-scripttools] 
         [-no-declarative] [-declarative] [-no-declarative-debug] [-declarative-debug]
         [-no-location] [-location]
+        [-qt-pcre] [-system-pcre]
         [additional platform specific options (see below)]
 
 
@@ -3795,6 +3804,9 @@ Third Party Libraries:
  +  -openssl ........... Enable run-time OpenSSL support.
     -openssl-linked .... Enabled linked OpenSSL support.
 
+    -qt-pcre ........... Use the PCRE library bundled with Qt.
+ +  -system-pcre ....... Use the PCRE library from the operating system.
+
 Additional options:
 
     -make <part> ....... Add part to the list of parts to be built at make time.
@@ -6410,6 +6422,23 @@ if [ "$CFG_OPENSSL" != "no" ]; then
     fi
 fi
 
+# detect PCRE
+if [ "$CFG_PCRE" != "qt" ]; then
+    if "$unixtests/compile.test" "$XQMAKESPEC" "$QMAKE_CONFIG" $OPT_VERBOSE "$relpath" "$outpath" config.tests/unix/pcre "PCRE" $L_FLAGS $I_FLAGS $l_FLAGS; then
+        CFG_PCRE=system
+    else
+        if [ "$CFG_PCRE" = "system" ] && [ "$CFG_CONFIGURE_EXIT_ON_ERROR" = "yes" ]; then
+            echo "PCRE support cannot be enabled due to functionality tests!"
+            echo " Turn on verbose messaging (-v) to $0 to see the final report."
+            echo " If you believe this message is in error you may use the continue"
+            echo " switch (-continue) to $0 to continue."
+            exit 101
+        else
+            CFG_PCRE=qt
+        fi
+    fi
+fi
+
 # detect OpenVG support
 if [ "$CFG_OPENVG" != "no" ]; then
     if "$unixtests/compile.test" "$XQMAKESPEC" "$QMAKE_CONFIG" $OPT_VERBOSE "$relpath" "$outpath" "config.tests/unix/openvg" "OpenVG" $L_FLAGS $I_FLAGS $l_FLAGS $CONFIG_ARG; then
@@ -6931,6 +6960,10 @@ if [ "$CFG_FORCE_ASSERTS" = "yes" ]; then
     QT_CONFIG="$QT_CONFIG force_asserts"
 fi
 
+if [ "$CFG_PCRE" = "qt" ]; then
+    QMAKE_CONFIG="$QMAKE_CONFIG pcre"
+fi
+
 #
 # Some Qt modules are too advanced in C++ for some old compilers
 # Detect here the platforms where they are known to work.
@@ -8078,6 +8111,7 @@ if [ "$PLATFORM_MAC" = "yes" ]; then
     echo "CoreWlan support ....... $CFG_COREWLAN"
 fi
 echo "libICU support ......... $CFG_ICU"
+echo "PCRE support ........... $CFG_PCRE"
 if [ "$CFG_XCB_LIMITED" = "yes" ] && [ "$CFG_XCB" = "yes" ]; then
     echo "Xcb support ............ limited (old version)"
 else
diff --git a/tools/configure/configureapp.cpp b/tools/configure/configureapp.cpp
index 656323e365..d32b65107f 100644
--- a/tools/configure/configureapp.cpp
+++ b/tools/configure/configureapp.cpp
@@ -305,6 +305,8 @@ Configure::Configure(int& argc, char** argv)
 
     dictionary[ "ZLIB" ]            = "auto";
 
+    dictionary[ "PCRE" ]            = "auto";
+
     dictionary[ "GIF" ]             = "auto";
     dictionary[ "TIFF" ]            = "auto";
     dictionary[ "JPEG" ]            = "auto";
@@ -545,6 +547,12 @@ void Configure::parseCmdLine()
             dictionary[ "ZLIB" ] = "system";
         }
 
+        else if (configCmdLine.at(i) == "-qt-pcre") {
+            dictionary[ "PCRE" ] = "qt";
+        } else if (configCmdLine.at(i) == "-system-pcre") {
+            dictionary[ "PCRE" ] = "system";
+        }
+
         // Image formats --------------------------------------------
         else if (configCmdLine.at(i) == "-no-gif")
             dictionary[ "GIF" ] = "no";
@@ -1522,8 +1530,8 @@ bool Configure::displayHelp()
                     "[-no-qmake] [-qmake] [-dont-process] [-process]\n"
                     "[-no-style-<style>] [-qt-style-<style>] [-redo]\n"
                     "[-saveconfig <config>] [-loadconfig <config>]\n"
-                    "[-qt-zlib] [-system-zlib] [-no-gif] [-no-libpng]\n"
-                    "[-qt-libpng] [-system-libpng] [-no-libtiff] [-qt-libtiff]\n"
+                    "[-qt-zlib] [-system-zlib] [-qt-pcre] [-system-pcre] [-no-gif]\n"
+                    "[-no-libpng] [-qt-libpng] [-system-libpng] [-no-libtiff] [-qt-libtiff]\n"
                     "[-system-libtiff] [-no-libjpeg] [-qt-libjpeg] [-system-libjpeg]\n"
                     "[-mmx] [-no-mmx] [-3dnow] [-no-3dnow] [-sse] [-no-sse] [-sse2] [-no-sse2]\n"
                     "[-no-iwmmxt] [-iwmmxt] [-openssl] [-openssl-linked]\n"
@@ -1643,6 +1651,9 @@ bool Configure::displayHelp()
         desc("ZLIB", "qt",      "-qt-zlib",             "Use the zlib bundled with Qt.");
         desc("ZLIB", "system",  "-system-zlib",         "Use zlib from the operating system.\nSee http://www.gzip.org/zlib\n");
 
+        desc("PCRE", "qt",       "-qt-pcre",            "Use the PCRE library bundled with Qt.");
+        desc("PCRE", "qt",       "-system-pcre",        "Use the PCRE library from the operating system.\nSee http://pcre.org/\n");
+
         desc("GIF", "no",       "-no-gif",              "Do not compile GIF reading support.");
 
         desc("LIBPNG", "no",    "-no-libpng",           "Do not compile PNG support.");
@@ -1857,6 +1868,7 @@ QString Configure::defaultTo(const QString &option)
 {
     // We prefer using the system version of the 3rd party libs
     if (option == "ZLIB"
+        || option == "PCRE"
         || option == "LIBJPEG"
         || option == "LIBPNG"
         || option == "LIBTIFF")
@@ -1913,6 +1925,9 @@ bool Configure::checkAvailability(const QString &part)
     else if (part == "ZLIB")
         available = findFile("zlib.h");
 
+    else if (part == "PCRE")
+        available = findFile("pcre.h");
+
     else if (part == "LIBJPEG")
         available = findFile("jpeglib.h");
     else if (part == "LIBPNG")
@@ -2035,6 +2050,10 @@ void Configure::autoDetection()
     if (dictionary["ZLIB"] == "auto")
         dictionary["ZLIB"] =  checkAvailability("ZLIB") ? defaultTo("ZLIB") : "qt";
 
+    // PCRE detection
+    if (dictionary["PCRE"] == "auto")
+        dictionary["PCRE"] = checkAvailability("PCRE") ? defaultTo("PCRE") : "qt";
+
     // Image format detection
     if (dictionary["GIF"] == "auto")
         dictionary["GIF"] = defaultTo("GIF");
@@ -2251,6 +2270,10 @@ void Configure::generateOutputVars()
     else if (dictionary[ "ZLIB" ] == "system")
         qtConfig += "system-zlib";
 
+    // PCRE ---------------------------------------------------------
+    if (dictionary[ "PCRE" ] == "qt")
+        qmakeConfig += "pcre";
+
     // Image formates -----------------------------------------------
     if (dictionary[ "GIF" ] == "no")
         qtConfig += "no-gif";
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