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