Contents of /tags/mkinitrd-6_1_12/busybox/Makefile.flags
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Tue Nov 17 21:24:51 2009 UTC (14 years, 10 months ago) by niro
File size: 3774 byte(s)
Tue Nov 17 21:24:51 2009 UTC (14 years, 10 months ago) by niro
File size: 3774 byte(s)
tagged 'mkinitrd-6_1_12'
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,-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_WERROR),y) |
33 | 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 += $(call cc-option,-fvisibility=hidden) |
73 | endif |
74 | |
75 | ifeq ($(CONFIG_STATIC),y) |
76 | 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 |
89 | |
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 |