4 NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
5 CHECKFLAGS += $(NOSTDINC_FLAGS)
7 +# improve gcc optimization
8 +CFLAGS += $(call cc-option,-funit-at-a-time,)
10 # warn about C99 declaration after statement
11 CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)