6 files changed, 37 insertions, 7 deletions
diff --git a/mkspecs/android-clang/qmake.conf b/mkspecs/android-clang/qmake.conf
index a077c70cba..975d43779d 100644
--- a/mkspecs/android-clang/qmake.conf
+++ b/mkspecs/android-clang/qmake.conf
@@ -31,7 +31,7 @@ else: equals(ANDROID_TARGET_ARCH, mips64): \
 
 QMAKE_CFLAGS += -gcc-toolchain $$NDK_TOOLCHAIN_PATH -fno-limit-debug-info
 
-QMAKE_LINK    = $$QMAKE_CXX $$QMAKE_CFLAGS -Wl,--exclude-libs,libgcc.a -Wl,--exclude-libs,libatomic.a
+QMAKE_LINK    = $$QMAKE_CXX $$QMAKE_CFLAGS -Wl,--exclude-libs,libgcc.a -Wl,--exclude-libs,libatomic.a -nostdlib++
 equals(ANDROID_TARGET_ARCH, armeabi-v7a): QMAKE_LINK += -Wl,--exclude-libs,libunwind.a
 
 QMAKE_CFLAGS += -DANDROID_HAS_WSTRING --sysroot=$$NDK_ROOT/sysroot \
diff --git a/mkspecs/devices/linux-rasp-pi3-vc4-g++/qmake.conf b/mkspecs/devices/linux-rasp-pi3-vc4-g++/qmake.conf
index 75b6ad7db5..b4a4484594 100644
--- a/mkspecs/devices/linux-rasp-pi3-vc4-g++/qmake.conf
+++ b/mkspecs/devices/linux-rasp-pi3-vc4-g++/qmake.conf
@@ -20,7 +20,7 @@
 # output check that "EGLFS GBM .......... yes" is present, otherwise
 # eglfs will not be functional.
 #
-# ./configure -release -opengl es2 -device linux-rpi3-vc4-g++ \
+# ./configure -release -opengl es2 -device linux-rasp-pi3-vc4-g++ \
 #   -device-option CROSS_COMPILE=~/raspbian/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin/arm-linux-gnueabihf- \
 #   -sysroot ~/raspbian/sysroot \
 #   -prefix /usr/local/qt5pi -extprefix ~/raspbian/qt5pi -hostprefix ~/raspbian/qt5 \
diff --git a/mkspecs/features/qt_build_config.prf b/mkspecs/features/qt_build_config.prf
index 0c6c10dded..8a7c9c28d3 100644
--- a/mkspecs/features/qt_build_config.prf
+++ b/mkspecs/features/qt_build_config.prf
@@ -37,8 +37,10 @@ intel_icl {
 
 QMAKE_DIR_REPLACE_SANE = PRECOMPILED_DIR OBJECTS_DIR MOC_DIR RCC_DIR UI_DIR
 
+load(qt_prefix_build_check)
+
 # force_independent can be set externally. prefix_build not.
-!exists($$[QT_HOST_DATA]/.qmake.cache): \
+qtIsPrefixBuild($$[QT_HOST_DATA]): \
     CONFIG += prefix_build force_independent
 
 !build_pass:!isEmpty(_QMAKE_SUPER_CACHE_):force_independent {
diff --git a/mkspecs/features/qt_configure.prf b/mkspecs/features/qt_configure.prf
index 95e54d72c9..242544d41b 100644
--- a/mkspecs/features/qt_configure.prf
+++ b/mkspecs/features/qt_configure.prf
@@ -2502,17 +2502,19 @@ logn("Configure summary:")
 logn()
 qtConfPrintReport()
 
+load(qt_prefix_build_check)
+
 # final notes for the user
 logn()
 logn("Qt is now configured for building. Just run '$$QMAKE_MAKE_NAME'.")
 pfx = $$[QT_INSTALL_PREFIX]
-exists($$pfx/.qmake.cache) {
+qtIsPrefixBuild($$pfx) {
+    logn("Once everything is built, you must run '$$QMAKE_MAKE_NAME install'.")
+    logn("Qt will be installed into '$$system_path($$pfx)'.")
+} else {
     logn("Once everything is built, Qt is installed.")
     logn("You should NOT run '$$QMAKE_MAKE_NAME install'.")
     logn("Note that this build cannot be deployed to other machines or devices.")
-} else {
-    logn("Once everything is built, you must run '$$QMAKE_MAKE_NAME install'.")
-    logn("Qt will be installed into '$$system_path($$pfx)'.")
 }
 logn()
 logn("Prior to reconfiguration, make sure you remove any leftovers from")
diff --git a/mkspecs/features/qt_module.prf b/mkspecs/features/qt_module.prf
index 51b5bde67a..18060cd490 100644
--- a/mkspecs/features/qt_module.prf
+++ b/mkspecs/features/qt_module.prf
@@ -82,6 +82,11 @@ header_module {
     CONFIG      += force_qt  # Needed for the headers_clean tests.
     !lib_bundle: \
         CONFIG  += qt_no_install_library
+
+    # Allow creation of .prl, .la and .pc files.
+    target.path = $$[QT_INSTALL_LIBS]
+    target.CONFIG += dummy_install
+    INSTALLS    += target
 } else {
     TEMPLATE     = lib
 }
diff --git a/mkspecs/features/qt_prefix_build_check.prf b/mkspecs/features/qt_prefix_build_check.prf
new file mode 100644
index 0000000000..3f98847de9
--- /dev/null
+++ b/mkspecs/features/qt_prefix_build_check.prf
@@ -0,0 +1,21 @@
+#
+#  W A R N I N G
+#  -------------
+#
+# This file is not part of the Qt API.  It exists purely as an
+# implementation detail.  It may change from version to version
+# without notice, or even be removed.
+#
+# We mean it.
+#
+
+defineTest(qtIsPrefixBuild) {
+    prefixdir = $$1
+    # qtbase non-prefix build?
+    exists($$prefixdir/.qmake.cache): \
+        return(false)
+    # top-level non-prefix build?
+    contains(prefixdir, .*/qtbase):exists($$dirname(prefixdir)/.qmake.super): \
+        return(false)
+    return(true)
+}