| 3 |
# ========================================================================== |
# ========================================================================== |
| 4 |
|
|
| 5 |
BB_VER = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) |
BB_VER = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) |
| 6 |
|
export BB_VER |
| 7 |
|
SKIP_STRIP = n |
| 8 |
|
|
| 9 |
# -std=gnu99 needed for [U]LLONG_MAX on some systems |
# -std=gnu99 needed for [U]LLONG_MAX on some systems |
| 10 |
|
CPPFLAGS += $(call cc-option,-std=gnu99,) |
| 11 |
|
|
| 12 |
CPPFLAGS += \ |
CPPFLAGS += \ |
|
-std=gnu99 \ |
|
| 13 |
-Iinclude -Ilibbb \ |
-Iinclude -Ilibbb \ |
| 14 |
$(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) -I$(srctree)/libbb \ |
$(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include -I$(srctree)/libbb) \ |
| 15 |
-include include/autoconf.h \ |
-include include/autoconf.h \ |
| 16 |
-D_GNU_SOURCE -DNDEBUG \ |
-D_GNU_SOURCE -DNDEBUG \ |
| 17 |
$(if $(CONFIG_LFS),-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64) \ |
$(if $(CONFIG_LFS),-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64) \ |
| 18 |
-D"BB_VER=KBUILD_STR($(BB_VER))" -DBB_BT=AUTOCONF_TIMESTAMP |
-D"BB_VER=KBUILD_STR($(BB_VER))" -DBB_BT=AUTOCONF_TIMESTAMP |
| 19 |
|
|
| 20 |
CFLAGS += \ |
CFLAGS += $(call cc-option,-Wall,) |
| 21 |
-Wall -Wstrict-prototypes -Wshadow -Wundef \ |
CFLAGS += $(call cc-option,-Wshadow,) |
| 22 |
-funsigned-char -fno-builtin-strlen -finline-limit=0 -static-libgcc \ |
CFLAGS += $(call cc-option,-Wwrite-strings,) |
| 23 |
-Os -falign-functions=1 -falign-jumps=1 -falign-loops=1 \ |
CFLAGS += $(call cc-option,-Wundef,) |
| 24 |
-fomit-frame-pointer -ffunction-sections -fdata-sections |
CFLAGS += $(call cc-option,-Wstrict-prototypes,) |
| 25 |
|
CFLAGS += $(call cc-option,-Wunused -Wunused-parameter,) |
| 26 |
|
CFLAGS += $(call cc-option,-Wmissing-prototypes -Wmissing-declarations,) |
| 27 |
|
# warn about C99 declaration after statement |
| 28 |
|
CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) |
| 29 |
|
# If you want to add more -Wsomething above, make sure that it is |
| 30 |
|
# still possible to build bbox without warnings. |
| 31 |
|
|
| 32 |
ifeq ($(CONFIG_DEBUG),y) |
ifeq ($(CONFIG_WERROR),y) |
| 33 |
CFLAGS += -g |
CFLAGS += $(call cc-option,-Werror,) |
| 34 |
|
endif |
| 35 |
|
# gcc 3.x emits bogus "old style proto" warning on find.c:alloc_action() |
| 36 |
|
CFLAGS += $(call cc-ifversion, -ge, 0400, -Wold-style-definition) |
| 37 |
|
|
| 38 |
|
CFLAGS += $(call cc-option,-fno-builtin-strlen -finline-limit=0 -fomit-frame-pointer -ffunction-sections -fdata-sections,) |
| 39 |
|
# -fno-guess-branch-probability: prohibit pseudo-random guessing |
| 40 |
|
# of branch probabilities (hopefully makes bloatcheck more stable): |
| 41 |
|
CFLAGS += $(call cc-option,-fno-guess-branch-probability,) |
| 42 |
|
CFLAGS += $(call cc-option,-funsigned-char -static-libgcc,) |
| 43 |
|
CFLAGS += $(call cc-option,-falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1,) |
| 44 |
|
|
| 45 |
|
# FIXME: These warnings are at least partially to be concerned about and should |
| 46 |
|
# be fixed.. |
| 47 |
|
#CFLAGS += $(call cc-option,-Wconversion,) |
| 48 |
|
|
| 49 |
|
ifneq ($(CONFIG_DEBUG),y) |
| 50 |
|
CFLAGS += $(call cc-option,-Os,) |
| 51 |
|
else |
| 52 |
|
CFLAGS += $(call cc-option,-g,) |
| 53 |
|
#CFLAGS += "-D_FORTIFY_SOURCE=2" |
| 54 |
|
ifeq ($(CONFIG_DEBUG_PESSIMIZE),y) |
| 55 |
|
CFLAGS += $(call cc-option,-O0,) |
| 56 |
|
else |
| 57 |
|
CFLAGS += $(call cc-option,-Os,) |
| 58 |
|
endif |
| 59 |
|
endif |
| 60 |
|
|
| 61 |
|
# If arch/$(ARCH)/Makefile did not override it (with, say, -fPIC)... |
| 62 |
|
ARCH_FPIC ?= -fpic |
| 63 |
|
ARCH_FPIE ?= -fpie |
| 64 |
|
ARCH_PIE ?= -pie |
| 65 |
|
|
| 66 |
|
ifeq ($(CONFIG_BUILD_LIBBUSYBOX),y) |
| 67 |
|
# on i386: 14% smaller libbusybox.so |
| 68 |
|
# (code itself is 9% bigger, we save on relocs/PLT/GOT) |
| 69 |
|
CFLAGS += $(ARCH_FPIC) |
| 70 |
|
# and another 4% reduction of libbusybox.so: |
| 71 |
|
# (external entry points must be marked EXTERNALLY_VISIBLE) |
| 72 |
|
CFLAGS += $(call cc-option,-fvisibility=hidden) |
| 73 |
endif |
endif |
| 74 |
|
|
| 75 |
ifeq ($(CONFIG_STATIC),y) |
ifeq ($(CONFIG_STATIC),y) |
| 76 |
LDFLAGS += -static |
CFLAGS_busybox += -static |
| 77 |
|
endif |
| 78 |
|
|
| 79 |
|
ifeq ($(CONFIG_PIE),y) |
| 80 |
|
CFLAGS_busybox += $(ARCH_PIE) |
| 81 |
|
CFLAGS += $(ARCH_FPIE) |
| 82 |
|
endif |
| 83 |
|
|
| 84 |
|
LDLIBS += m crypt |
| 85 |
|
|
| 86 |
|
ifeq ($(CONFIG_PAM),y) |
| 87 |
|
LDLIBS += pam pam_misc |
| 88 |
endif |
endif |
| 89 |
#LDFLAGS += -nostdlib |
|
| 90 |
|
ifeq ($(CONFIG_SELINUX),y) |
| 91 |
|
LDLIBS += selinux sepol |
| 92 |
|
endif |
| 93 |
|
|
| 94 |
|
ifeq ($(CONFIG_EFENCE),y) |
| 95 |
|
LDLIBS += efence |
| 96 |
|
endif |
| 97 |
|
|
| 98 |
|
ifeq ($(CONFIG_DMALLOC),y) |
| 99 |
|
LDLIBS += dmalloc |
| 100 |
|
endif |
| 101 |
|
|
| 102 |
|
# If a flat binary should be built, CFLAGS_busybox="-Wl,-elf2flt" |
| 103 |
|
# env var should be set for make invocation. |
| 104 |
|
# Here we check whether CFLAGS_busybox indeed contains that flag. |
| 105 |
|
# (For historical reasons, we also check LDFLAGS, which doesn't |
| 106 |
|
# seem to be entirely correct variable to put "-Wl,-elf2flt" into). |
| 107 |
|
W_ELF2FLT = -Wl,-elf2flt |
| 108 |
|
ifneq (,$(findstring $(W_ELF2FLT),$(LDFLAGS) $(CFLAGS_busybox))) |
| 109 |
|
SKIP_STRIP = y |
| 110 |
|
endif |
| 111 |
|
|
| 112 |
|
# Busybox is a stack-fatty so make sure we increase default size |
| 113 |
|
# TODO: use "make stksizes" to find & fix big stack users |
| 114 |
|
# (we stole scripts/checkstack.pl from the kernel... thanks guys!) |
| 115 |
|
# Reduced from 20k to 16k in 1.9.0. |
| 116 |
|
FLTFLAGS += -s 16000 |
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