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