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62 lines
2.4 KiB
Makefile
62 lines
2.4 KiB
Makefile
# ==========================================================================
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# Build system
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# ==========================================================================
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BB_VER = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)
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# -std=gnu99 needed for [U]LLONG_MAX on some systems
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CPPFLAGS += $(call cc-option,-std=gnu99,)
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CPPFLAGS += \
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-Iinclude -Ilibbb \
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$(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) -I$(srctree)/libbb \
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-include include/autoconf.h \
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-D_GNU_SOURCE -DNDEBUG \
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$(if $(CONFIG_LFS),-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64) \
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-D"BB_VER=KBUILD_STR($(BB_VER))" -DBB_BT=AUTOCONF_TIMESTAMP
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# flag checks are grouped together to speed the checks up a bit..
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CFLAGS += $(call cc-option,-Wall -Wshadow -Wwrite-strings,)
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CFLAGS += $(call cc-option,-Wundef -Wstrict-prototypes,)
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# If you want to add "-Wmissing-prototypes -Wmissing-declarations" above
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# (or anything else for that matter) make sure that it is still possible
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# to build bbox without warnings. Current offender: find.c:alloc_action().
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# Looks more like gcc bug: gcc will warn on it with or without prototype.
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# But still, warning-free compile is a must, or else we will drown
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# in warnings pretty soon.
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ifeq ($(CONFIG_WERROR),y)
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CFLAGS += $(call cc-option,-Werror,)
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endif
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# gcc 3.x emits bogus "old style proto" warning on find.c:alloc_action()
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CFLAGS += $(call cc-ifversion, -ge, 0400, -Wold-style-definition)
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# gcc emits bogus "no prev proto" warning on find.c:alloc_action()
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ifneq ($(CONFIG_WERROR),y)
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CFLAGS += $(call cc-option,-Wmissing-prototypes -Wmissing-declarations,)
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endif
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CFLAGS += $(call cc-option,-Os -fno-builtin-strlen -finline-limit=0 -fomit-frame-pointer -ffunction-sections -fdata-sections,)
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# -fno-guess-branch-probability: prohibit pseudo-random guessing
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# of branch probabilities (hopefully makes bloatcheck more stable):
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CFLAGS += $(call cc-option,-fno-guess-branch-probability,)
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CFLAGS += $(call cc-option,-funsigned-char -static-libgcc,)
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CFLAGS += $(call cc-option,-falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1,)
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# FIXME: These warnings are at least partially to be concerned about and should
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# be fixed..
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#CFLAGS+=$(call cc-option,-Wconversion,)
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ifeq ($(CONFIG_DEBUG),y)
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CFLAGS += $(call cc-option,-g)
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endif
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ifeq ($(CONFIG_STATIC),y)
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LDFLAGS += -static
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endif
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ifeq ($(CONFIG_SELINUX),y)
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LDFLAGS += -lselinux -lsepol
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endif
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#LDFLAGS += -nostdlib
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