1 # ==========================================================================
3 # ==========================================================================
5 BB_VER = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
7 # -std=gnu99 needed for [U]LLONG_MAX on some systems
9 CPPFLAGS += $(call cc-option,-std=gnu99,)
12 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) -I$(srctree)/libbb \
13 -include include/autoconf.h \
14 -D_GNU_SOURCE -DNDEBUG \
15 $(if $(CONFIG_LFS),-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64) \
16 -D"BB_VER=KBUILD_STR($(BB_VER))" -DBB_BT=AUTOCONF_TIMESTAMP
18 # flag checks are grouped together to speed the checks up a bit..
19 CFLAGS += $(call cc-option,-Wall -Wshadow,)
20 ifeq ($(CONFIG_WERROR),y)
21 CFLAGS += $(call cc-option,-Werror,)
23 CFLAGS += $(call cc-option,-Wundef -Wold-style-definition -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations,)
24 CFLAGS += $(call cc-option,-Os -fno-builtin-strlen -finline-limit=0 -fomit-frame-pointer -ffunction-sections -fdata-sections,)
25 # -fno-guess-branch-probability: prohibit pseudo-random guessing
26 # of branch probabilities (hopefully makes bloatcheck more stable)
27 CFLAGS += $(call cc-option,-funsigned-char -fno-guess-branch-probability -static-libgcc,)
28 CFLAGS += $(call cc-option,-falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1,)
30 # FIXME: These warnings are at least partially to be concerned about and should
32 #CFLAGS+=$(call cc-option,-Wconversion,)
34 ifeq ($(CONFIG_DEBUG),y)
35 CFLAGS += $(call cc-option,-g)
38 ifeq ($(CONFIG_STATIC),y)