qt5: Add missing include path to pkg-config files

This is achieved by patching qtbase `qmake/generators/makefile.cpp` to
unconditionally add the missing `-I${includedir}`. The include path is
otherwise conditioned on whether it is already available or not. Since there is
no unified set of system include paths in nix this cause problems as reported
in #52457.

1 files changed, 14 insertions, 0 deletions

diff --git a/pkgs/development/libraries/qt-5/5.12/qtbase.patch.d/0014-qtbase-pkg-config.patch b/pkgs/development/libraries/qt-5/5.12/qtbase.patch.d/0014-qtbase-pkg-config.patch
new file mode 100644
index 0000000000000..90caaea1cf4d4
--- /dev/null
+++ b/pkgs/development/libraries/qt-5/5.12/qtbase.patch.d/0014-qtbase-pkg-config.patch
@@ -0,0 +1,14 @@
+diff --git a/qmake/generators/makefile.cpp b/qmake/generators/makefile.cpp
+--- a/qmake/generators/makefile.cpp
++++ b/qmake/generators/makefile.cpp
+@@ -3390,8 +3390,7 @@ MakefileGenerator::writePkgConfigFile()
+       << varGlue("QMAKE_PKGCONFIG_CFLAGS", "", " ", " ")
+         //      << varGlue("DEFINES","-D"," -D"," ")
+          ;
+-    if (!project->values("QMAKE_DEFAULT_INCDIRS").contains(includeDir))
+-        t << "-I${includedir}";
++    t << "-I${includedir}";
+     if (target_mode == TARG_MAC_MODE && project->isActiveConfig("lib_bundle")
+         && libDir != QLatin1String("/Library/Frameworks")) {
+             t << " -F${libdir}";
+