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    Contents of /trunk/mkinitrd-magellan/busybox/Makefile.flags

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    Revision 1123 - (show annotations) (download)
    Wed Aug 18 21:56:57 2010 UTC (13 years, 8 months ago) by niro
    File size: 4445 byte(s) 
    -updated to busybox-1.17.1
    1 # ==========================================================================
    2 # Build system
    3 # ==========================================================================
    4
    5 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
    10 CPPFLAGS += $(call cc-option,-std=gnu99,)
    11
    12 CPPFLAGS += \
    13 -Iinclude -Ilibbb \
    14 $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include -I$(srctree)/libbb) \
    15 -include include/autoconf.h \
    16 -D_GNU_SOURCE -DNDEBUG \
    17 $(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
    19
    20 CFLAGS += $(call cc-option,-Wall,)
    21 CFLAGS += $(call cc-option,-Wshadow,)
    22 CFLAGS += $(call cc-option,-Wwrite-strings,)
    23 CFLAGS += $(call cc-option,-Wundef,)
    24 CFLAGS += $(call cc-option,-Wstrict-prototypes,)
    25 CFLAGS += $(call cc-option,-Wunused -Wunused-parameter,)
    26 CFLAGS += $(call cc-option,-Wunused-function -Wunused-value,)
    27 CFLAGS += $(call cc-option,-Wmissing-prototypes -Wmissing-declarations,)
    28 # warn about C99 declaration after statement
    29 CFLAGS += $(call cc-option,-Wdeclaration-after-statement,)
    30 # If you want to add more -Wsomething above, make sure that it is
    31 # still possible to build bbox without warnings.
    32
    33 ifeq ($(CONFIG_WERROR),y)
    34 CFLAGS += $(call cc-option,-Werror,)
    35 ## TODO:
    36 ## gcc version 4.4.0 20090506 (Red Hat 4.4.0-4) (GCC) is a PITA:
    37 ## const char *ptr; ... off_t v = *(off_t*)ptr; -> BOOM
    38 ## and no easy way to convince it to shut the hell up.
    39 ## We have a lot of such things all over the place.
    40 ## Classic *(off_t*)(void*)ptr does not work,
    41 ## and I am unwilling to do crazy gcc specific ({ void *ppp = ...; })
    42 ## stuff in macros. This would obfuscate the code too much.
    43 ## Maybe try __attribute__((__may_alias__))?
    44 #CFLAGS += $(call cc-ifversion, -eq, 0404, -fno-strict-aliasing)
    45 endif
    46 # gcc 3.x emits bogus "old style proto" warning on find.c:alloc_action()
    47 CFLAGS += $(call cc-ifversion, -ge, 0400, -Wold-style-definition)
    48
    49 CFLAGS += $(call cc-option,-fno-builtin-strlen -finline-limit=0 -fomit-frame-pointer -ffunction-sections -fdata-sections,)
    50 # -fno-guess-branch-probability: prohibit pseudo-random guessing
    51 # of branch probabilities (hopefully makes bloatcheck more stable):
    52 CFLAGS += $(call cc-option,-fno-guess-branch-probability,)
    53 CFLAGS += $(call cc-option,-funsigned-char -static-libgcc,)
    54 CFLAGS += $(call cc-option,-falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1,)
    55
    56 # FIXME: These warnings are at least partially to be concerned about and should
    57 # be fixed..
    58 #CFLAGS += $(call cc-option,-Wconversion,)
    59
    60 ifneq ($(CONFIG_DEBUG),y)
    61 CFLAGS += $(call cc-option,-Os,)
    62 else
    63 CFLAGS += $(call cc-option,-g,)
    64 #CFLAGS += "-D_FORTIFY_SOURCE=2"
    65 ifeq ($(CONFIG_DEBUG_PESSIMIZE),y)
    66 CFLAGS += $(call cc-option,-O0,)
    67 else
    68 CFLAGS += $(call cc-option,-Os,)
    69 endif
    70 endif
    71
    72 # If arch/$(ARCH)/Makefile did not override it (with, say, -fPIC)...
    73 ARCH_FPIC ?= -fpic
    74 ARCH_FPIE ?= -fpie
    75 ARCH_PIE ?= -pie
    76
    77 ifeq ($(CONFIG_BUILD_LIBBUSYBOX),y)
    78 # on i386: 14% smaller libbusybox.so
    79 # (code itself is 9% bigger, we save on relocs/PLT/GOT)
    80 CFLAGS += $(ARCH_FPIC)
    81 # and another 4% reduction of libbusybox.so:
    82 # (external entry points must be marked EXTERNALLY_VISIBLE)
    83 CFLAGS += $(call cc-option,-fvisibility=hidden)
    84 endif
    85
    86 ifeq ($(CONFIG_STATIC),y)
    87 CFLAGS_busybox += -static
    88 endif
    89
    90 ifeq ($(CONFIG_PIE),y)
    91 CFLAGS_busybox += $(ARCH_PIE)
    92 CFLAGS += $(ARCH_FPIE)
    93 endif
    94
    95 ifneq ($(CONFIG_EXTRA_CFLAGS),)
    96 CFLAGS += $(strip $(subst ",,$(CONFIG_EXTRA_CFLAGS)))
    97 #"))
    98 endif
    99
    100 LDLIBS += m crypt
    101
    102 ifeq ($(CONFIG_PAM),y)
    103 LDLIBS += pam pam_misc
    104 endif
    105
    106 ifeq ($(CONFIG_SELINUX),y)
    107 LDLIBS += selinux sepol
    108 endif
    109
    110 ifeq ($(CONFIG_EFENCE),y)
    111 LDLIBS += efence
    112 endif
    113
    114 ifeq ($(CONFIG_DMALLOC),y)
    115 LDLIBS += dmalloc
    116 endif
    117
    118 # If a flat binary should be built, CFLAGS_busybox="-elf2flt"
    119 # env var should be set for make invocation.
    120 # Here we check whether CFLAGS_busybox indeed contains that flag.
    121 # (For historical reasons, we also check LDFLAGS, which doesn't
    122 # seem to be entirely correct variable to put "-elf2flt" into).
    123 W_ELF2FLT = -elf2flt
    124 ifneq (,$(findstring $(W_ELF2FLT),$(LDFLAGS) $(CFLAGS_busybox)))
    125 SKIP_STRIP = y
    126 endif
    127
    128 # Busybox is a stack-fatty so make sure we increase default size
    129 # TODO: use "make stksizes" to find & fix big stack users
    130 # (we stole scripts/checkstack.pl from the kernel... thanks guys!)
    131 # Reduced from 20k to 16k in 1.9.0.
    132 FLTFLAGS += -s 16000