| # ========================================================================== |
| # Build system |
| # ========================================================================== |
| |
| BB_VER = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) |
| |
| # -std=gnu99 needed for [U]LLONG_MAX on some systems |
| |
| CPPFLAGS += $(call cc-option,-std=gnu99,) |
| CPPFLAGS += \ |
| -Iinclude -Ilibbb \ |
| $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) -I$(srctree)/libbb \ |
| -include include/autoconf.h \ |
| -D_GNU_SOURCE -DNDEBUG \ |
| $(if $(CONFIG_LFS),-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64) \ |
| -D"BB_VER=KBUILD_STR($(BB_VER))" -DBB_BT=AUTOCONF_TIMESTAMP |
| |
| # flag checks are grouped together to speed the checks up a bit.. |
| CFLAGS += $(call cc-option,-Wall -Wshadow,) |
| ifeq ($(CONFIG_WERROR),y) |
| CFLAGS += $(call cc-option,-Werror,) |
| endif |
| CFLAGS += $(call cc-option,-Wundef -Wold-style-definition -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations,) |
| CFLAGS += $(call cc-option,-Os -fno-builtin-strlen -finline-limit=0 -fomit-frame-pointer -ffunction-sections -fdata-sections,) |
| # -fno-guess-branch-probability: prohibit pseudo-random guessing |
| # of branch probabilities (hopefully makes bloatcheck more stable) |
| CFLAGS += $(call cc-option,-funsigned-char -fno-guess-branch-probability -static-libgcc,) |
| CFLAGS += $(call cc-option,-falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1,) |
| |
| # FIXME: These warnings are at least partially to be concerned about and should |
| # be fixed.. |
| #CFLAGS+=$(call cc-option,-Wconversion,) |
| |
| ifeq ($(CONFIG_DEBUG),y) |
| CFLAGS += $(call cc-option,-g) |
| endif |
| |
| ifeq ($(CONFIG_STATIC),y) |
| LDFLAGS += -static |
| endif |
| #LDFLAGS += -nostdlib |