1 macx-xcode|macx-pbuilder {

     2 } else {

     3    QMAKE_CFLAGS += $$QMAKE_CFLAGS_X86_64

     4    QMAKE_OBJECTIVE_CFLAGS += $$QMAKE_OBJECTIVE_CFLAGS_X86_64

     5    QMAKE_CXXFLAGS += $$QMAKE_CXXFLAGS_X86_64

     6    QMAKE_LFLAGS += $$QMAKE_LFLAGS_X86_64

     7 }