--- old/qtbase/src/plugins/platforms/xcb/xcb_qpa_lib.pro 2015-03-17
+++ new/qtbase/src/plugins/platforms/xcb/xcb_qpa_lib.pro 2015-03-17
@@ -76,8 +76,6 @@
 
 DEFINES += $$QMAKE_DEFINES_XCB
 LIBS += $$QMAKE_LIBS_XCB
-QMAKE_CXXFLAGS += $$QMAKE_CFLAGS_XCB
-QMAKE_CFLAGS += $$QMAKE_CFLAGS_XCB
 
 CONFIG += qpa/genericunixfontdatabase
 
@@ -89,7 +87,8 @@
 contains(QT_CONFIG, xcb-qt) {
     DEFINES += XCB_USE_RENDER
     XCB_DIR = ../../../3rdparty/xcb
-    INCLUDEPATH += $$XCB_DIR/include $$XCB_DIR/sysinclude
+    QMAKE_CFLAGS += -I$$XCB_DIR/include -I$$XCB_DIR/sysinclude $$QMAKE_CFLAGS_XCB
+    QMAKE_CXXFLAGS += -I$$XCB_DIR/include -I$$XCB_DIR/sysinclude $$QMAKE_CFLAGS_XCB
     LIBS += -lxcb -L$$MODULE_BASE_OUTDIR/lib -lxcb-static$$qtPlatformTargetSuffix()
 } else {
     LIBS += -lxcb -lxcb-image -lxcb-icccm -lxcb-sync -lxcb-xfixes -lxcb-shm -lxcb-randr -lxcb-shape -lxcb-keysyms -lxcb-xinerama
--- old/qtbase/src/plugins/platforms/xcb/xcb-static/xcb-static.pro
+++ new/qtbase/src/plugins/platforms/xcb/xcb-static/xcb-static.pro
@@ -9,7 +9,8 @@
 
 XCB_DIR = ../../../../3rdparty/xcb
 
-INCLUDEPATH += $$XCB_DIR/include $$XCB_DIR/include/xcb $$XCB_DIR/sysinclude
+QMAKE_CFLAGS += -I$$XCB_DIR/include -I$$XCB_DIR/include/xcb -I$$XCB_DIR/sysinclude
+QMAKE_CXXFLAGS += -I$$XCB_DIR/include -I$$XCB_DIR/include/xcb -I$$XCB_DIR/sysinclude
 
 QMAKE_CXXFLAGS += $$QMAKE_CFLAGS_XCB
 QMAKE_CFLAGS += $$QMAKE_CFLAGS_XCB
--- old/qtbase/src/plugins/platforms/xcb/xcb-plugin.pro
+++ new/qtbase/src/plugins/platforms/xcb/xcb-plugin.pro
@@ -6,6 +6,13 @@
     qxcbmain.cpp
 OTHER_FILES += xcb.json README
 
+contains(QT_CONFIG, xcb-qt) {
+    DEFINES += XCB_USE_RENDER
+    XCB_DIR = ../../../3rdparty/xcb
+    QMAKE_CFLAGS += -I$$XCB_DIR/include -I$$XCB_DIR/sysinclude $$QMAKE_CFLAGS_XCB
+    QMAKE_CXXFLAGS += -I$$XCB_DIR/include -I$$XCB_DIR/sysinclude $$QMAKE_CFLAGS_XCB
+}
+
 PLUGIN_TYPE = platforms
 PLUGIN_CLASS_NAME = QXcbIntegrationPlugin
 !equals(TARGET, $$QT_DEFAULT_QPA_PLUGIN): PLUGIN_EXTENDS = -