Current File : //lib64/qt5/mkspecs/common/clang-mac.conf

QMAKE_OBJCFLAGS_PRECOMPILE       = -x objective-c-header -c ${QMAKE_PCH_INPUT} -o ${QMAKE_PCH_OUTPUT}
QMAKE_OBJCFLAGS_USE_PRECOMPILE   = $$QMAKE_CFLAGS_USE_PRECOMPILE
QMAKE_OBJCXXFLAGS_PRECOMPILE     = -x objective-c++-header -c ${QMAKE_PCH_INPUT} -o ${QMAKE_PCH_OUTPUT}
QMAKE_OBJCXXFLAGS_USE_PRECOMPILE = $$QMAKE_CFLAGS_USE_PRECOMPILE

QMAKE_XCODE_GCC_VERSION = com.apple.compilers.llvm.clang.1_0

QMAKE_CXXFLAGS += -stdlib=libc++
QMAKE_LFLAGS   += -stdlib=libc++
QMAKE_AR_LTCG  = libtool -static -o

QMAKE_CFLAGS_APPLICATION_EXTENSION  = -fapplication-extension