--- mkspecs/common/mac.conf.orig
+++ mkspecs/common/mac.conf
QMAKE_INCDIR_QT = $$[QT_INSTALL_HEADERS]
QMAKE_LIBDIR_QT = $$[QT_INSTALL_LIBS]
+QMAKE_FRAMEWORKDIR_QT = $$[QT_INSTALL_FRAMEWORKS]
QMAKE_INCDIR_OPENGL = /System/Library/Frameworks/OpenGL.framework/Headers \
/System/Library/Frameworks/AGL.framework/Headers/
QMAKE_CHK_DIR_EXISTS = test -d
-QMAKE_MACOSX_DEPLOYMENT_TARGET = 10.4 # overridden to 10.5 for Cocoa on the compiler command line
+QMAKE_MACOSX_DEPLOYMENT_TARGET = @MACOSX_DEPLOYMENT_TARGET@
+# allow CC and CXX to use CCACHE;
+# use "make CCACHE=ccache" when building
+QMAKE_CC = $(CCACHE) $$QMAKE_CC
+QMAKE_CXX = $(CCACHE) $$QMAKE_CXX