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Denis Vlasenko7d219aa2006-10-05 10:17:08 +00001# ==========================================================================
Denis Vlasenkoda8f43f2006-10-09 19:47:38 +00002# Build system
Denis Vlasenko7d219aa2006-10-05 10:17:08 +00003# ==========================================================================
4
5BB_VER = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
6
Denis Vlasenkobf11e892006-11-26 22:17:46 +00007# -std=gnu99 needed for [U]LLONG_MAX on some systems
8
Bernhard Reutner-Fischer82f87882007-01-23 11:39:13 +00009CPPFLAGS += $(call cc-option,-std=gnu99,)
Denis Vlasenko7039a662006-10-08 17:54:47 +000010CPPFLAGS += \
11 -Iinclude -Ilibbb \
12 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) -I$(srctree)/libbb \
13 -include include/autoconf.h \
14 -D_GNU_SOURCE -DNDEBUG \
15 $(if $(CONFIG_LFS),-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64) \
Bernhard Reutner-Fischerfeea1b92006-12-06 21:51:59 +000016 -D"BB_VER=KBUILD_STR($(BB_VER))" -DBB_BT=AUTOCONF_TIMESTAMP
17
Bernhard Reutner-Fischer82f87882007-01-23 11:39:13 +000018# flag checks are grouped together to speed the checks up a bit..
19CFLAGS += $(call cc-option,-Wall -Wshadow,)
20CFLAGS += $(call cc-option,-Wundef -Wold-style-definition -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations,)
21CFLAGS += $(call cc-option,-Os -fno-builtin-strlen -finline-limit=0 -fomit-frame-pointer -ffunction-sections -fdata-sections,)
22CFLAGS += $(call cc-option,-static-libgcc -funsigned-char,)
23CFLAGS += $(call cc-option,-falign-functions=1 -falign-jumps=1 -falign-loops=1,)
24
Bernhard Reutner-Fischerfdcd7c42007-01-22 17:50:21 +000025# FIXME: These warnings are at least partially to be concerned about and should
26# be fixed..
Bernhard Reutner-Fischer82f87882007-01-23 11:39:13 +000027#CFLAGS+=$(call cc-option,-Wconversion,)
Bernhard Reutner-Fischer9729e652006-12-13 17:44:24 +000028
29ifeq ($(CONFIG_DEBUG),y)
Bernhard Reutner-Fischer82f87882007-01-23 11:39:13 +000030CFLAGS += $(call cc-option,-g)
Bernhard Reutner-Fischer9729e652006-12-13 17:44:24 +000031endif
32
Bernhard Reutner-Fischerc1feac62007-01-08 16:29:15 +000033ifeq ($(CONFIG_STATIC),y)
34LDFLAGS += -static
35endif
Bernhard Reutner-Fischerd6c23ae2007-01-08 16:38:33 +000036#LDFLAGS += -nostdlib