QMAKE_CXXFLAGS += -Wextra QMAKE_CXXFLAGS += -Wshadow QMAKE_CXXFLAGS += -Wold-style-cast QMAKE_CXXFLAGS += -Wnon-virtual-dtor QMAKE_CXXFLAGS += -Wcast-align -Wunused -Woverloaded-virtual -Wformat=2 QMAKE_CXXFLAGS += -Wdouble-promotion # Enable Link Time Optimization QMAKE_CXXFLAGS += -flto # Clang LTO requires the gold linker instead of ld QMAKE_LFLAGS += -flto -fuse-ld=gold