Rules.mak 18 KB

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  1. # Rules.make for uClibc
  2. #
  3. # Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
  4. #
  5. # Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
  6. #
  7. # check for proper make version
  8. ifneq ($(findstring 3.7,$(MAKE_VERSION)),)
  9. $(error Your make is too old $(MAKE_VERSION). Go get at least 3.80)
  10. endif
  11. #-----------------------------------------------------------
  12. # This file contains rules which are shared between multiple
  13. # Makefiles. All normal configuration options live in the
  14. # file named ".config". Don't mess with this file unless
  15. # you know what you are doing.
  16. #-----------------------------------------------------------
  17. # If you are running a cross compiler, you will want to set
  18. # 'CROSS' to something more interesting ... Target
  19. # architecture is determined by asking the CC compiler what
  20. # arch it compiles things for, so unless your compiler is
  21. # broken, you should not need to specify TARGET_ARCH.
  22. #
  23. # Most people will set this stuff on the command line, i.e.
  24. # make CROSS=arm-linux-
  25. # will build uClibc for 'arm'.
  26. ifndef CROSS
  27. CROSS=
  28. endif
  29. CC = $(CROSS)gcc
  30. AR = $(CROSS)ar
  31. LD = $(CROSS)ld
  32. NM = $(CROSS)nm
  33. STRIPTOOL = $(CROSS)strip
  34. INSTALL = install
  35. LN = ln
  36. RM = rm -f
  37. TAR = tar
  38. STRIP_FLAGS ?= -x -R .note -R .comment
  39. # Select the compiler needed to build binaries for your development system
  40. HOSTCC = gcc
  41. BUILD_CFLAGS = -O2 -Wall
  42. export ARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun.*/sparc/ -e s/sparc.*/sparc/ \
  43. -e s/arm.*/arm/ -e s/sa110/arm/ -e s/sh.*/sh/ \
  44. -e s/s390x/s390/ -e s/parisc.*/hppa/ \
  45. -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
  46. -e s/xtensa.*/xtensa/ )
  47. #---------------------------------------------------------
  48. # Nothing beyond this point should ever be touched by mere
  49. # mortals. Unless you hang out with the gods, you should
  50. # probably leave all this stuff alone.
  51. # Pull in the user's uClibc configuration
  52. ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
  53. -include $(top_builddir).config
  54. endif
  55. # Make certain these contain a final "/", but no "//"s.
  56. TARGET_ARCH:=$(shell grep -s '^TARGET_ARCH' $(top_builddir)/.config | sed -e 's/^TARGET_ARCH=//' -e 's/"//g')
  57. TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH))))
  58. TARGET_SUBARCH:=$(shell grep -s '^TARGET_SUBARCH' $(top_builddir)/.config | sed -e 's/^TARGET_SUBARCH=//' -e 's/"//g')
  59. TARGET_SUBARCH:=$(strip $(subst ",, $(strip $(TARGET_SUBARCH))))
  60. RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(RUNTIME_PREFIX))))))
  61. DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(DEVEL_PREFIX))))))
  62. KERNEL_HEADERS:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(KERNEL_HEADERS))))))
  63. export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_HEADERS
  64. # Now config hard core
  65. MAJOR_VERSION := 0
  66. MINOR_VERSION := 9
  67. SUBLEVEL := 29
  68. EXTRAVERSION :=
  69. VERSION := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
  70. ifneq ($(EXTRAVERSION),)
  71. VERSION := $(VERSION)$(EXTRAVERSION)
  72. endif
  73. # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
  74. LC_ALL := C
  75. export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION LC_ALL
  76. LIBC := libc
  77. SHARED_MAJORNAME := $(LIBC).so.$(MAJOR_VERSION)
  78. ifneq ($(findstring $(TARGET_ARCH) , hppa64 ia64 mips64 powerpc64 s390x sparc64 x86_64 ),)
  79. UCLIBC_LDSO_NAME := ld64-uClibc
  80. else
  81. UCLIBC_LDSO_NAME := ld-uClibc
  82. endif
  83. UCLIBC_LDSO := $(UCLIBC_LDSO_NAME).so.$(MAJOR_VERSION)
  84. NONSHARED_LIBNAME := uclibc_nonshared.a
  85. libc := $(top_builddir)lib/$(SHARED_MAJORNAME)
  86. interp := $(top_builddir)lib/interp.os
  87. ldso := $(top_builddir)lib/$(UCLIBC_LDSO)
  88. headers_dep := $(top_builddir)include/bits/sysnum.h
  89. sub_headers := $(headers_dep)
  90. #LIBS :=$(interp) -L$(top_builddir)lib -lc
  91. LIBS := $(interp) -L$(top_builddir)lib $(libc:.$(MAJOR_VERSION)=)
  92. # Make sure DESTDIR and PREFIX can be used to install
  93. # PREFIX is a uClibcism while DESTDIR is a common GNUism
  94. ifndef PREFIX
  95. PREFIX = $(DESTDIR)
  96. endif
  97. ifneq ($(HAVE_SHARED),y)
  98. libc :=
  99. interp :=
  100. ldso :=
  101. endif
  102. comma:=,
  103. space:= #
  104. ifndef CROSS
  105. CROSS=$(subst ",, $(strip $(CROSS_COMPILER_PREFIX)))
  106. endif
  107. # A nifty macro to make testing gcc features easier
  108. check_gcc=$(shell \
  109. if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
  110. then echo "$(1)"; else echo "$(2)"; fi)
  111. check_as=$(shell \
  112. if $(CC) -Wa,$(1) -Wa,-Z -c -o /dev/null -xassembler /dev/null > /dev/null 2>&1; \
  113. then echo "-Wa,$(1)"; fi)
  114. check_ld=$(shell \
  115. if $(LD) $(1) -o /dev/null -b binary /dev/null > /dev/null 2>&1; \
  116. then echo "$(1)"; fi)
  117. ARFLAGS:=cr
  118. OPTIMIZATION:=
  119. # Use '-Os' optimization if available, else use -O2, allow Config to override
  120. OPTIMIZATION+=$(call check_gcc,-Os,-O2)
  121. # Use the gcc 3.4 -funit-at-a-time optimization when available
  122. OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
  123. GCC_MAJOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 1)
  124. #GCC_MINOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 2)
  125. ifeq ($(GCC_MAJOR_VER),4)
  126. # shrinks code, results are from 4.0.2
  127. # 0.36%
  128. OPTIMIZATION+=$(call check_gcc,-fno-tree-loop-optimize,)
  129. # 0.34%
  130. OPTIMIZATION+=$(call check_gcc,-fno-tree-dominator-opts,)
  131. # 0.1%
  132. OPTIMIZATION+=$(call check_gcc,-fno-strength-reduce,)
  133. endif
  134. CPU_CFLAGS-$(UCLIBC_FORMAT_SHARED_FLAT) += -mid-shared-library
  135. CPU_CFLAGS-$(UCLIBC_FORMAT_FLAT_SEP_DATA) += -msep-data
  136. PICFLAG-y := -fPIC
  137. PICFLAG-$(UCLIBC_FORMAT_FDPIC_ELF) := -mfdpic
  138. PICFLAG := $(PICFLAG-y)
  139. PIEFLAG_NAME:=-fPIE
  140. # Some nice CPU specific optimizations
  141. ifeq ($(TARGET_ARCH),i386)
  142. OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
  143. OPTIMIZATION+=$(call check_gcc,-falign-jumps=0 -falign-loops=0,-malign-jumps=0 -malign-loops=0)
  144. CPU_LDFLAGS-y+=-m32
  145. CPU_CFLAGS-y+=-m32
  146. CPU_CFLAGS-$(CONFIG_386)+=-march=i386
  147. CPU_CFLAGS-$(CONFIG_486)+=-march=i486
  148. CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
  149. CPU_CFLAGS-$(CONFIG_586)+=-march=i586
  150. CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
  151. CPU_CFLAGS-$(CONFIG_686)+=-march=i686
  152. CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
  153. CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
  154. CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
  155. CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
  156. CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-march=i686) $(call check_gcc,-falign-functions=4,-malign-functions=4)
  157. CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686 $(call check_gcc,-falign-functions=0,-malign-functions=0)
  158. CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
  159. CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
  160. CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486) $(call check_gcc,-falign-functions=0,-malign-functions=0)
  161. CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
  162. endif
  163. ifeq ($(TARGET_ARCH),sparc)
  164. CPU_CFLAGS-$(CONFIG_SPARC_V7)+=-mcpu=v7
  165. CPU_CFLAGS-$(CONFIG_SPARC_V8)+=-mcpu=v8
  166. CPU_CFLAGS-$(CONFIG_SPARC_V9)+=-mcpu=v9
  167. CPU_CFLAGS-$(CONFIG_SPARC_V9B)+=$(call check_gcc,-mcpu=v9b,-mcpu=ultrasparc)
  168. endif
  169. ifeq ($(TARGET_ARCH),arm)
  170. OPTIMIZATION+=-fstrict-aliasing
  171. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-Wl,-EL
  172. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-Wl,-EB
  173. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
  174. CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
  175. CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
  176. CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
  177. CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
  178. CPU_CFLAGS-$(CONFIG_ARM7TDMI)+=-mtune=arm7tdmi -march=armv4t
  179. CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4t
  180. CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4t
  181. CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4t
  182. CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv5t
  183. CPU_CFLAGS-$(CONFIG_ARM10T)+=-mtune=arm10tdmi -march=armv5t
  184. CPU_CFLAGS-$(CONFIG_ARM1136JF_S)+=-mtune=arm1136jf-s -march=armv6
  185. CPU_CFLAGS-$(CONFIG_ARM1176JZ_S)+=-mtune=arm1176jz-s -march=armv6
  186. CPU_CFLAGS-$(CONFIG_ARM1176JZF_S)+=-mtune=arm1176jzf-s -march=armv6
  187. CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
  188. CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
  189. CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
  190. CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv5te -Wa,-mcpu=xscale
  191. CPU_CFLAGS-$(CONFIG_ARM_IWMMXT)+=-march=iwmmxt -Wa,-mcpu=iwmmxt -mabi=iwmmxt
  192. endif
  193. ifeq ($(TARGET_ARCH),mips)
  194. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-Wl,-EL
  195. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-Wl,-EB
  196. CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
  197. CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
  198. CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
  199. CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
  200. CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
  201. CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
  202. ifeq ($(strip $(ARCH_BIG_ENDIAN)),y)
  203. CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64btsmip
  204. CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32btsmip
  205. endif
  206. ifeq ($(strip $(ARCH_LITTLE_ENDIAN)),y)
  207. CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64ltsmip
  208. CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32ltsmip
  209. endif
  210. CPU_CFLAGS-$(CONFIG_MIPS_N64_ABI)+=-mabi=64
  211. CPU_CFLAGS-$(CONFIG_MIPS_O32_ABI)+=-mabi=32
  212. CPU_CFLAGS-$(CONFIG_MIPS_N32_ABI)+=-mabi=n32
  213. endif
  214. ifeq ($(TARGET_ARCH),nios)
  215. CPU_LDFLAGS-y+=-Wl,-m32
  216. CPU_CFLAGS-y+=-Wl,-m32
  217. endif
  218. ifeq ($(TARGET_ARCH),sh)
  219. OPTIMIZATION+=-fstrict-aliasing
  220. OPTIMIZATION+= $(call check_gcc,-mprefergot,)
  221. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-Wl,-EL
  222. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-Wl,-EB
  223. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
  224. CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
  225. CPU_CFLAGS-$(CONFIG_SH2)+=-m2
  226. CPU_CFLAGS-$(CONFIG_SH3)+=-m3
  227. ifeq ($(UCLIBC_HAS_FLOATS),y)
  228. CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
  229. CPU_CFLAGS-$(CONFIG_SH4)+=-m4
  230. else
  231. CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
  232. CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
  233. endif
  234. endif
  235. ifeq ($(TARGET_ARCH),sh64)
  236. OPTIMIZATION+=-fstrict-aliasing
  237. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):=-Wl,-EL
  238. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):=-Wl,-EB
  239. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
  240. CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
  241. CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
  242. endif
  243. ifeq ($(TARGET_ARCH),h8300)
  244. SYMBOL_PREFIX=_
  245. CPU_LDFLAGS-$(CONFIG_H8300H)+= -Wl,-ms8300h
  246. CPU_LDFLAGS-$(CONFIG_H8S) += -Wl,-ms8300s
  247. CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32
  248. CPU_CFLAGS-$(CONFIG_H8S) += -ms -mint32
  249. endif
  250. ifeq ($(TARGET_ARCH),cris)
  251. CPU_LDFLAGS-$(CONFIG_CRIS)+=-Wl,-mcrislinux
  252. CPU_LDFLAGS-$(CONFIG_CRISV32)+=-Wl,-mcrislinux
  253. CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
  254. PICFLAG:=-fpic
  255. PIEFLAG_NAME:=-fpie
  256. endif
  257. ifeq ($(TARGET_ARCH),m68k)
  258. # -fPIC is only supported for 68020 and above. It is not supported
  259. # for 68000, 68010, or Coldfire.
  260. PICFLAG:=-fpic
  261. PIEFLAG_NAME:=-fpie
  262. endif
  263. ifeq ($(TARGET_ARCH),powerpc)
  264. # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
  265. # enough. Therefore use -fpic which will reduce code size and generates
  266. # faster code.
  267. PICFLAG:=-fpic
  268. PIEFLAG_NAME:=-fpie
  269. PPC_HAS_REL16:=$(shell echo -e "\t.text\n\taddis 11,30,_GLOBAL_OFFSET_TABLE_-.@ha" | $(CC) -c -x assembler -o /dev/null - 2> /dev/null && echo -n y || echo -n n)
  270. CPU_CFLAGS-$(PPC_HAS_REL16)+= -DHAVE_ASM_PPC_REL16
  271. CPU_CFLAGS-$(CONFIG_E500) += "-D__NO_MATH_INLINES -D__NO_LONG_DOUBLE_MATH"
  272. endif
  273. ifeq ($(TARGET_ARCH),bfin)
  274. SYMBOL_PREFIX=_
  275. ifeq ($(UCLIBC_FORMAT_FDPIC_ELF),y)
  276. CPU_CFLAGS-y:=-mfdpic
  277. CPU_LDFLAGS-y += -Wl,-melf32bfinfd
  278. PICFLAG:=-fpic
  279. PIEFLAG_NAME:=-fpie
  280. endif
  281. ifeq ($(UCLIBC_FORMAT_SHARED_FLAT),y)
  282. PICFLAG := -mleaf-id-shared-library
  283. endif
  284. endif
  285. ifeq ($(TARGET_ARCH),frv)
  286. CPU_LDFLAGS-$(CONFIG_FRV)+=-Wl,-melf32frvfd
  287. # Using -pie causes the program to have an interpreter, which is
  288. # forbidden, so we must make do with -shared. Unfortunately,
  289. # -shared by itself would get us global function descriptors
  290. # and calls through PLTs, dynamic resolution of symbols, etc,
  291. # which would break as well, but -Bsymbolic comes to the rescue.
  292. export LDPIEFLAG:=-Wl,-shared -Wl,-Bsymbolic
  293. UCLIBC_LDSO=ld.so.1
  294. endif
  295. ifeq ($(strip $(TARGET_ARCH)),avr32)
  296. CPU_CFLAGS-$(CONFIG_AVR32_AP7) += -march=ap
  297. CPU_CFLAGS-$(CONFIG_LINKRELAX) += -mrelax
  298. CPU_LDFLAGS-$(CONFIG_LINKRELAX) += --relax
  299. endif
  300. ifeq ($(TARGET_ARCH),i960)
  301. SYMBOL_PREFIX=_
  302. endif
  303. ifeq ($(TARGET_ARCH),microblaze)
  304. SYMBOL_PREFIX=_
  305. endif
  306. ifeq ($(TARGET_ARCH),v850)
  307. SYMBOL_PREFIX=_
  308. endif
  309. # Keep the check_gcc from being needlessly executed
  310. ifndef PIEFLAG
  311. ifneq ($(UCLIBC_BUILD_PIE),y)
  312. export PIEFLAG:=
  313. else
  314. export PIEFLAG:=$(call check_gcc,$(PIEFLAG_NAME),$(PICFLAG))
  315. endif
  316. endif
  317. # We need to keep track of both the CC PIE flag (above) as
  318. # well as the LD PIE flag (below) because we can't rely on
  319. # gcc passing -pie if we used -fPIE
  320. ifndef LDPIEFLAG
  321. ifneq ($(UCLIBC_BUILD_PIE),y)
  322. export LDPIEFLAG:=
  323. else
  324. export LDPIEFLAG:=$(shell $(LD) --help 2>/dev/null | grep -q -- -pie && echo "-Wl,-pie")
  325. endif
  326. endif
  327. # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
  328. ifndef ASNEEDED
  329. export ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -q -- --as-needed && echo "AS_NEEDED ( $(UCLIBC_LDSO) )" || echo "$(UCLIBC_LDSO)")
  330. endif
  331. # Add a bunch of extra pedantic annoyingly strict checks
  332. XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -fno-strict-aliasing
  333. ifeq ($(EXTRA_WARNINGS),y)
  334. XWARNINGS+=-Wnested-externs -Wshadow -Wmissing-noreturn -Wmissing-format-attribute -Wformat=2
  335. XWARNINGS+=-Wmissing-prototypes -Wmissing-declarations
  336. XWARNINGS+=-Wnonnull -Wundef
  337. # works only w/ gcc-3.4 and up, can't be checked for gcc-3.x w/ check_gcc()
  338. #XWARNINGS+=-Wdeclaration-after-statement
  339. endif
  340. XARCH_CFLAGS=$(subst ",, $(strip $(ARCH_CFLAGS)))
  341. CPU_CFLAGS=$(subst ",, $(strip $(CPU_CFLAGS-y)))
  342. SSP_DISABLE_FLAGS ?= $(call check_gcc,-fno-stack-protector,)
  343. ifeq ($(UCLIBC_BUILD_SSP),y)
  344. SSP_CFLAGS := $(call check_gcc,-fno-stack-protector-all,)
  345. SSP_CFLAGS += $(call check_gcc,-fstack-protector,)
  346. SSP_ALL_CFLAGS ?= $(call check_gcc,-fstack-protector-all,)
  347. else
  348. SSP_CFLAGS := $(SSP_DISABLE_FLAGS)
  349. endif
  350. NOSTDLIB_CFLAGS:=$(call check_gcc,-nostdlib,)
  351. # Some nice CFLAGS to work with
  352. CFLAGS := -include $(top_builddir)include/libc-symbols.h \
  353. $(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
  354. -fno-builtin -nostdinc -I$(top_builddir)include -I. \
  355. -I$(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH)
  356. ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS)),"")
  357. CFLAGS += $(subst ",, $(UCLIBC_EXTRA_CFLAGS))
  358. endif
  359. LDADD_LIBFLOAT=
  360. ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
  361. # If -msoft-float isn't supported, we want an error anyway.
  362. # Hmm... might need to revisit this for arm since it has 2 different
  363. # soft float encodings.
  364. ifneq ($(TARGET_ARCH),nios)
  365. ifneq ($(TARGET_ARCH),nios2)
  366. CFLAGS += -msoft-float
  367. endif
  368. endif
  369. ifeq ($(TARGET_ARCH),arm)
  370. # No longer needed with current toolchains, but leave it here for now.
  371. # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
  372. # LDADD_LIBFLOAT=-lfloat
  373. endif
  374. endif
  375. # We need this to be checked within libc-symbols.h
  376. ifneq ($(HAVE_SHARED),y)
  377. CFLAGS += -DSTATIC
  378. endif
  379. CFLAGS += $(call check_gcc,-std=gnu99,)
  380. LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -Wl,-shared \
  381. -Wl,--warn-common -Wl,--warn-once -Wl,-z,combreloc
  382. # binutils-2.16.1 warns about ignored sections, 2.16.91.0.3 and newer are ok
  383. #LDFLAGS_NOSTRIP+=$(call check_ld,--gc-sections)
  384. ifeq ($(UCLIBC_BUILD_RELRO),y)
  385. LDFLAGS_NOSTRIP+=-Wl,-z,relro
  386. endif
  387. ifeq ($(UCLIBC_BUILD_NOW),y)
  388. LDFLAGS_NOSTRIP+=-Wl,-z,now
  389. endif
  390. ifeq ($(LDSO_GNU_HASH_SUPPORT),y)
  391. # Be sure that binutils support it
  392. LDFLAGS_GNUHASH:=$(call check_ld,--hash-style=gnu)
  393. ifeq ($(LDFLAGS_GNUHASH),)
  394. $(error Your binutils don't support --hash-style option, while you want to use it)
  395. else
  396. LDFLAGS_NOSTRIP += -Wl,$(LDFLAGS_GNUHASH)
  397. endif
  398. endif
  399. LDFLAGS:=$(LDFLAGS_NOSTRIP) -Wl,-z,defs
  400. ifeq ($(DODEBUG),y)
  401. #CFLAGS += -g3
  402. CFLAGS += -O0 -g3
  403. else
  404. CFLAGS += $(OPTIMIZATION) $(XARCH_CFLAGS)
  405. endif
  406. ifeq ($(DOSTRIP),y)
  407. LDFLAGS += -Wl,-s
  408. else
  409. STRIPTOOL := true -Stripping_disabled
  410. endif
  411. ifeq ($(DOMULTI),y)
  412. # we try to compile all sources at once into an object (IMA), but
  413. # gcc-3.3.x does not support it
  414. # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources
  415. # gcc-4.0.x supports it, supports the --combine flag, but does not need it
  416. # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless
  417. ifeq ($(GCC_MAJOR_VER),3)
  418. DOMULTI:=n
  419. else
  420. CFLAGS+=$(call check_gcc,--combine,)
  421. endif
  422. else
  423. DOMULTI:=n
  424. endif
  425. ifneq ($(strip $(UCLIBC_EXTRA_LDFLAGS)),"")
  426. LDFLAGS += $(subst ",, $(UCLIBC_EXTRA_LDFLAGS))
  427. endif
  428. ifeq ($(UCLIBC_HAS_THREADS),y)
  429. ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
  430. PTNAME := nptl
  431. else
  432. ifeq ($(LINUXTHREADS_OLD),y)
  433. PTNAME := linuxthreads.old
  434. else
  435. PTNAME := linuxthreads
  436. endif
  437. endif
  438. PTDIR := $(top_builddir)libpthread/$(PTNAME)
  439. # set up system dependencies include dirs (NOTE: order matters!)
  440. ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
  441. PTINC:= -I$(PTDIR) \
  442. -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
  443. -I$(PTDIR)/sysdeps/$(TARGET_ARCH) \
  444. -I$(PTDIR)/sysdeps/unix/sysv/linux \
  445. -I$(PTDIR)/sysdeps/pthread \
  446. -I$(PTDIR)/sysdeps/pthread/bits \
  447. -I$(PTDIR)/sysdeps/generic \
  448. -I$(top_srcdir)ldso/ldso/$(TARGET_ARCH) \
  449. -I$(top_srcdir)ldso/include
  450. #
  451. # Test for TLS if NPTL support was selected.
  452. #
  453. GCC_HAS_TLS=$(shell \
  454. echo "extern __thread int foo;" | $(CC) -o /dev/null -S -xc - 2>&1)
  455. ifneq ($(GCC_HAS_TLS),)
  456. gcc_tls_test_fail:
  457. @echo "####";
  458. @echo "#### Your compiler does not support TLS and you are trying to build uClibc";
  459. @echo "#### with NPTL support. Upgrade your binutils and gcc to versions which";
  460. @echo "#### support TLS for your architecture. Do not contact uClibc maintainers";
  461. @echo "#### about this problem.";
  462. @echo "####";
  463. @echo "#### Exiting...";
  464. @echo "####";
  465. @exit 1;
  466. endif
  467. else
  468. PTINC := \
  469. -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
  470. -I$(PTDIR)/sysdeps/$(TARGET_ARCH) \
  471. -I$(PTDIR)/sysdeps/unix/sysv/linux \
  472. -I$(PTDIR)/sysdeps/pthread \
  473. -I$(PTDIR) \
  474. -I$(top_builddir)libpthread
  475. endif
  476. CFLAGS+=$(PTINC)
  477. else
  478. PTNAME :=
  479. PTINC :=
  480. endif
  481. CFLAGS += -I$(KERNEL_HEADERS)
  482. CFLAGS += -iwithprefix include-fixed -iwithprefix include
  483. ifneq ($(DOASSERTS),y)
  484. CFLAGS+=-DNDEBUG
  485. endif
  486. ifeq ($(SYMBOL_PREFIX),_)
  487. CFLAGS+=-D__UCLIBC_UNDERSCORES__
  488. endif
  489. # Keep the check_as from being needlessly executed
  490. ifndef ASFLAGS_NOEXEC
  491. ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
  492. export ASFLAGS_NOEXEC := $(call check_as,--noexecstack)
  493. else
  494. export ASFLAGS_NOEXEC :=
  495. endif
  496. endif
  497. ASFLAGS = $(ASFLAGS_NOEXEC)
  498. LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
  499. LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
  500. LIBGCC_DIR:=$(dir $(LIBGCC))
  501. # moved from libpthread/linuxthreads
  502. ifeq ($(UCLIBC_CTOR_DTOR),y)
  503. SHARED_START_FILES:=$(top_builddir)lib/crti.o $(LIBGCC_DIR)crtbeginS.o
  504. SHARED_END_FILES:=$(LIBGCC_DIR)crtendS.o $(top_builddir)lib/crtn.o
  505. endif