qt5-webkit: fix cross build in i686 environment

srcpkgs/qt5-webkit/template

@@ -28,6 +28,14 @@ do_configure() {
 	# Patch for QtWebProcess LFLAGS
 	sed -i ${wrksrc}/Source/WebKit2/WebProcess.pro \
 		-e"/TARGET = QtWebProcess/i QMAKE_LFLAGS = $LDFLAGS"
+	if [ "$XBPS_ARCH" == "i686" -a -n "$CROSS_BUILD" ]; then
+		# Patch for i686 build environment: don't add i686 flags when cross compiling
+		sed -i ${wrksrc}/Tools/Scripts/webkitdirs.pm \
+			-e 's;"-march=pentium4 -msse2 -mfpmath=sse " . ;;'
+		sed -i ${wrksrc}/Tools/qmake/mkspecs/features/unix/default_post.prf \
+			-e 's;\(QMAKE_CFLAGS +=\) -msse2 -mfpmath=sse;\1;' \
+			-e 's;\(QMAKE_CXXFLAGS +=\) -msse2 -mfpmath=sse;\1;'
+	fi
 	qmake PREFIX=/usr LIB=/usr/lib QMAKE_LFLAGS_USE_GOLD= ${wrksrc}
 }
 do_build() {