On Sun, Mar 18, 2018 at 9:18 AM, Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx> wrote: > +ifneq ($(or $(filter gcc6,$(COMPILER_FEATURES)),$(filter clang4,$(COMPILER_FEATURES))),) > +CFLAGS += -Wextra Another thing we can add here is -Og instead of standard -O2 (or -O0 in my build), which is supported since gcc 4.8. clang seems to support it too (mapped to -O1 at least for clang5) but I don't know what version added that flag. -- Duy
