Rules.mak 16 KB

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  1. # Rules.make for uClibc
  2. #
  3. # Copyright (C) 2000 by Lineo, inc.
  4. # Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
  5. #
  6. # Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
  7. #
  8. #-----------------------------------------------------------
  9. # This file contains rules which are shared between multiple
  10. # Makefiles. All normal configuration options live in the
  11. # file named ".config". Don't mess with this file unless
  12. # you know what you are doing.
  13. #-----------------------------------------------------------
  14. # If you are running a cross compiler, you will want to set
  15. # 'CROSS' to something more interesting ... Target
  16. # architecture is determined by asking the CC compiler what
  17. # arch it compiles things for, so unless your compiler is
  18. # broken, you should not need to specify TARGET_ARCH.
  19. #
  20. # Most people will set this stuff on the command line, i.e.
  21. # make CROSS=arm-linux-
  22. # will build uClibc for 'arm'.
  23. ifndef CROSS
  24. CROSS=
  25. endif
  26. CC = $(CROSS)gcc
  27. AR = $(CROSS)ar
  28. LD = $(CROSS)ld
  29. NM = $(CROSS)nm
  30. STRIPTOOL = $(CROSS)strip
  31. INSTALL = install
  32. LN = ln
  33. RM = rm -f
  34. TAR = tar
  35. STRIP_FLAGS ?= -x -R .note -R .comment
  36. # Select the compiler needed to build binaries for your development system
  37. HOSTCC = gcc
  38. BUILD_CFLAGS = -O2 -Wall
  39. #---------------------------------------------------------
  40. # Nothing beyond this point should ever be touched by mere
  41. # mortals. Unless you hang out with the gods, you should
  42. # probably leave all this stuff alone.
  43. # Pull in the user's uClibc configuration
  44. ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
  45. -include $(top_builddir).config
  46. endif
  47. # Make certain these contain a final "/", but no "//"s.
  48. TARGET_ARCH:=$(shell grep -s '^TARGET_ARCH' $(top_builddir)/.config | sed -e 's/^TARGET_ARCH=//' -e 's/"//g')
  49. TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH))))
  50. RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(RUNTIME_PREFIX))))))
  51. DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(DEVEL_PREFIX))))))
  52. KERNEL_SOURCE:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(KERNEL_SOURCE))))))
  53. export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_SOURCE
  54. # Now config hard core
  55. MAJOR_VERSION := 0
  56. MINOR_VERSION := 9
  57. SUBLEVEL := 28
  58. VERSION := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
  59. # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
  60. LC_ALL := C
  61. export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION LC_ALL
  62. LIBC := libc
  63. SHARED_MAJORNAME := $(LIBC).so.$(MAJOR_VERSION)
  64. ifneq ($(findstring $(TARGET_ARCH) , hppa64 ia64 mips64 powerpc64 s390x sh64 sparc64 x86_64 ),)
  65. UCLIBC_LDSO_NAME := ld64-uClibc
  66. else
  67. UCLIBC_LDSO_NAME := ld-uClibc
  68. endif
  69. UCLIBC_LDSO := $(UCLIBC_LDSO_NAME).so.$(MAJOR_VERSION)
  70. NONSHARED_LIBNAME := uclibc_nonshared.a
  71. libc := $(top_builddir)lib/$(SHARED_MAJORNAME)
  72. interp := $(top_builddir)lib/interp.os
  73. ldso := $(top_builddir)lib/$(UCLIBC_LDSO)
  74. headers_dep := $(top_builddir)include/bits/sysnum.h
  75. sub_headers := $(headers_dep)
  76. #LIBS :=$(interp) -L$(top_builddir)lib -lc
  77. LIBS := $(interp) -L$(top_builddir)lib $(libc:.$(MAJOR_VERSION)=)
  78. # Make sure DESTDIR and PREFIX can be used to install
  79. # PREFIX is a uClibcism while DESTDIR is a common GNUism
  80. ifndef PREFIX
  81. PREFIX = $(DESTDIR)
  82. endif
  83. ifneq ($(HAVE_SHARED),y)
  84. libc :=
  85. interp :=
  86. ldso :=
  87. endif
  88. ifndef CROSS
  89. CROSS=$(subst ",, $(strip $(CROSS_COMPILER_PREFIX)))
  90. endif
  91. # A nifty macro to make testing gcc features easier
  92. check_gcc=$(shell \
  93. if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
  94. then echo "$(1)"; else echo "$(2)"; fi)
  95. check_as=$(shell \
  96. if $(CC) -Wa,$(1) -Wa,-Z -c -o /dev/null -xassembler /dev/null > /dev/null 2>&1; \
  97. then echo "-Wa,$(1)"; fi)
  98. check_ld=$(shell \
  99. if $(LD) $(1) -o /dev/null -b binary /dev/null > /dev/null 2>&1; \
  100. then echo "$(1)"; fi)
  101. ARFLAGS:=cr
  102. OPTIMIZATION:=
  103. # Use '-Os' optimization if available, else use -O2, allow Config to override
  104. OPTIMIZATION+=$(call check_gcc,-Os,-O2)
  105. # Use the gcc 3.4 -funit-at-a-time optimization when available
  106. OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
  107. GCC_MAJOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 1)
  108. #GCC_MINOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 2)
  109. ifeq ($(GCC_MAJOR_VER),4)
  110. # shrinks code, results are from 4.0.2
  111. # 0.36%
  112. OPTIMIZATION+=$(call check_gcc,-fno-tree-loop-optimize,)
  113. # 0.34%
  114. OPTIMIZATION+=$(call check_gcc,-fno-tree-dominator-opts,)
  115. # 0.1%
  116. OPTIMIZATION+=$(call check_gcc,-fno-strength-reduce,)
  117. endif
  118. PICFLAG:=-fPIC
  119. PIEFLAG_NAME:=-fPIE
  120. # Some nice CPU specific optimizations
  121. ifeq ($(TARGET_ARCH),i386)
  122. OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
  123. OPTIMIZATION+=$(call check_gcc,-falign-jumps=0 -falign-loops=0,-malign-jumps=0 -malign-loops=0)
  124. CPU_CFLAGS-$(CONFIG_386)+=-march=i386
  125. CPU_CFLAGS-$(CONFIG_486)+=-march=i486
  126. CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
  127. CPU_CFLAGS-$(CONFIG_586)+=-march=i586
  128. CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
  129. CPU_CFLAGS-$(CONFIG_686)+=-march=i686
  130. CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
  131. CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
  132. CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
  133. CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
  134. CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-march=i686) $(call check_gcc,-falign-functions=4,-malign-functions=4)
  135. CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686 $(call check_gcc,-falign-functions=0,-malign-functions=0)
  136. CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
  137. CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
  138. CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486) $(call check_gcc,-falign-functions=0,-malign-functions=0)
  139. CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
  140. endif
  141. ifeq ($(TARGET_ARCH),sparc)
  142. CPU_CFLAGS-$(CONFIG_SPARC_V7)+=-mcpu=v7
  143. CPU_CFLAGS-$(CONFIG_SPARC_V8)+=-mcpu=v8
  144. CPU_CFLAGS-$(CONFIG_SPARC_V9)+=-mcpu=v9
  145. CPU_CFLAGS-$(CONFIG_SPARC_V9B)+=$(call check_gcc,-mcpu=v9b,-mcpu=ultrasparc)
  146. endif
  147. ifeq ($(TARGET_ARCH),arm)
  148. OPTIMIZATION+=-fstrict-aliasing
  149. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
  150. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
  151. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
  152. CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
  153. CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
  154. CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
  155. CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
  156. CPU_CFLAGS-$(CONFIG_ARM7TDMI)+=-mtune=arm7tdmi -march=armv4
  157. CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4
  158. CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4
  159. CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4
  160. CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv5
  161. CPU_CFLAGS-$(CONFIG_ARM1136JF_S)+=-mtune=arm1136jf-s -march=armv6
  162. CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
  163. CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
  164. CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
  165. CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv4 -Wa,-mcpu=xscale
  166. endif
  167. ifeq ($(TARGET_ARCH),mips)
  168. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
  169. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
  170. CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
  171. CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
  172. CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
  173. CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
  174. CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
  175. CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
  176. endif
  177. ifeq ($(TARGET_ARCH),nios)
  178. CPU_LDFLAGS-y+=-m32
  179. CPU_CFLAGS-y+=-m32
  180. endif
  181. ifeq ($(TARGET_ARCH),sh)
  182. OPTIMIZATION+=-fstrict-aliasing
  183. OPTIMIZATION+= $(call check_gcc,-mprefergot,)
  184. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
  185. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
  186. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
  187. CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
  188. CPU_CFLAGS-$(CONFIG_SH2)+=-m2
  189. CPU_CFLAGS-$(CONFIG_SH3)+=-m3
  190. ifeq ($(UCLIBC_HAS_FLOATS),y)
  191. CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
  192. CPU_CFLAGS-$(CONFIG_SH4)+=-m4
  193. else
  194. CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
  195. CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
  196. endif
  197. endif
  198. ifeq ($(TARGET_ARCH),sh64)
  199. OPTIMIZATION+=-fstrict-aliasing
  200. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):=-EL
  201. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):=-EB
  202. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
  203. CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
  204. CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
  205. endif
  206. ifeq ($(TARGET_ARCH),h8300)
  207. CPU_LDFLAGS-$(CONFIG_H8300H)+= -ms8300h
  208. CPU_LDFLAGS-$(CONFIG_H8S) += -ms8300s
  209. CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32
  210. CPU_CFLAGS-$(CONFIG_H8S) += -ms -mint32
  211. endif
  212. ifeq ($(TARGET_ARCH),cris)
  213. CPU_LDFLAGS-$(CONFIG_CRIS)+=-mcrislinux
  214. CPU_LDFLAGS-$(CONFIG_CRISV32)+=-mcrislinux
  215. CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
  216. PICFLAG:=-fpic
  217. PIEFLAG_NAME:=-fpie
  218. endif
  219. ifeq ($(TARGET_ARCH),m68k)
  220. # -fPIC is only supported for 68020 and above. It is not supported
  221. # for 68000, 68010, or Coldfire.
  222. PICFLAG:=-fpic
  223. PIEFLAG_NAME:=-fpie
  224. endif
  225. ifeq ($(TARGET_ARCH),powerpc)
  226. # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
  227. # enough. Therefore use -fpic which will reduce code size and generates
  228. # faster code.
  229. PICFLAG:=-fpic
  230. PIEFLAG_NAME:=-fpie
  231. endif
  232. ifeq ($(TARGET_ARCH),bfin)
  233. PICFLAG:=-mfdpic
  234. endif
  235. ifeq ($(TARGET_ARCH),frv)
  236. CPU_LDFLAGS-$(CONFIG_FRV)+=-melf32frvfd
  237. CPU_CFLAGS-$(CONFIG_FRV)+=-mfdpic
  238. # Using -pie causes the program to have an interpreter, which is
  239. # forbidden, so we must make do with -shared. Unfortunately,
  240. # -shared by itself would get us global function descriptors
  241. # and calls through PLTs, dynamic resolution of symbols, etc,
  242. # which would break as well, but -Bsymbolic comes to the rescue.
  243. export LDPIEFLAG:=-shared -Bsymbolic
  244. UCLIBC_LDSO=ld.so.1
  245. endif
  246. # Keep the check_gcc from being needlessly executed
  247. ifndef PIEFLAG
  248. ifneq ($(UCLIBC_BUILD_PIE),y)
  249. export PIEFLAG:=
  250. else
  251. export PIEFLAG:=$(call check_gcc,$(PIEFLAG_NAME),$(PICFLAG))
  252. endif
  253. endif
  254. # We need to keep track of both the CC PIE flag (above) as
  255. # well as the LD PIE flag (below) because we can't rely on
  256. # gcc passing -pie if we used -fPIE
  257. ifndef LDPIEFLAG
  258. ifneq ($(UCLIBC_BUILD_PIE),y)
  259. export LDPIEFLAG:=
  260. else
  261. export LDPIEFLAG:=$(shell $(LD) --help 2>/dev/null | grep -q -- -pie && echo "-Wl,-pie")
  262. endif
  263. endif
  264. # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
  265. ifndef ASNEEDED
  266. ifneq ($(UCLIBC_HAS_SSP),y)
  267. export ASNEEDED:=
  268. else
  269. 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 $LD_TMP ) )
  270. endif
  271. endif
  272. # Add a bunch of extra pedantic annoyingly strict checks
  273. XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -fno-strict-aliasing
  274. ifeq ($(EXTRA_WARNINGS),y)
  275. XWARNINGS+=-Wnested-externs -Wshadow -Wmissing-noreturn -Wmissing-format-attribute -Wformat=2
  276. XWARNINGS+=-Wmissing-prototypes -Wmissing-declarations
  277. # works only w/ gcc-3.4 and up, can't be checked for gcc-3.x w/ check_gcc()
  278. #XWARNINGS+=-Wdeclaration-after-statement
  279. endif
  280. XARCH_CFLAGS=$(subst ",, $(strip $(ARCH_CFLAGS)))
  281. CPU_CFLAGS=$(subst ",, $(strip $(CPU_CFLAGS-y)))
  282. SSP_DISABLE_FLAGS ?= $(call check_gcc,-fno-stack-protector,)
  283. ifeq ($(UCLIBC_BUILD_SSP),y)
  284. SSP_CFLAGS := $(call check_gcc,-fno-stack-protector-all,)
  285. SSP_CFLAGS += $(call check_gcc,-fstack-protector,)
  286. SSP_ALL_CFLAGS ?= $(call check_gcc,-fstack-protector-all,)
  287. else
  288. SSP_CFLAGS := $(SSP_DISABLE_FLAGS)
  289. endif
  290. # Some nice CFLAGS to work with
  291. CFLAGS := -include $(top_builddir)include/libc-symbols.h \
  292. $(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
  293. -fno-builtin -nostdinc -I$(top_builddir)include -I.
  294. LDADD_LIBFLOAT=
  295. ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
  296. # If -msoft-float isn't supported, we want an error anyway.
  297. # Hmm... might need to revisit this for arm since it has 2 different
  298. # soft float encodings.
  299. ifneq ($(TARGET_ARCH),nios)
  300. ifneq ($(TARGET_ARCH),nios2)
  301. CFLAGS += -msoft-float
  302. endif
  303. endif
  304. ifeq ($(TARGET_ARCH),arm)
  305. # No longer needed with current toolchains, but leave it here for now.
  306. # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
  307. # LDADD_LIBFLOAT=-lfloat
  308. endif
  309. endif
  310. # Make sure "char" behavior is the same everywhere
  311. CFLAGS += -fsigned-char
  312. # We need this to be checked within libc-symbols.h
  313. ifneq ($(HAVE_SHARED),y)
  314. CFLAGS += -DSTATIC
  315. endif
  316. # only i386 is known to work if compile.S gets -D__ASSEMBLER__
  317. #CFLAGS += $(call check_gcc,-std=c99,)
  318. LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -shared --warn-common --warn-once -z combreloc
  319. # binutils-2.16.1 warns about ignored sections, 2.16.91.0.3 and newer are ok
  320. #LDFLAGS_NOSTRIP+=$(call check_ld,--gc-sections)
  321. ifeq ($(UCLIBC_BUILD_RELRO),y)
  322. LDFLAGS_NOSTRIP+=-z relro
  323. endif
  324. ifeq ($(UCLIBC_BUILD_NOW),y)
  325. LDFLAGS_NOSTRIP+=-z now
  326. endif
  327. LDFLAGS:=$(LDFLAGS_NOSTRIP) -z defs
  328. ifeq ($(DODEBUG),y)
  329. #CFLAGS += -g3
  330. CFLAGS += -O0 -g3
  331. else
  332. CFLAGS += $(OPTIMIZATION) $(XARCH_CFLAGS)
  333. endif
  334. ifeq ($(NOSTRIP),y)
  335. STRIPTOOL := true -Stripping_disabled
  336. else
  337. LDFLAGS += -s
  338. endif
  339. ifeq ($(DOMULTI),y)
  340. # we try to compile all sources at once into an object (IMA), but
  341. # gcc-3.3.x does not support it
  342. # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources
  343. # gcc-4.0.x supports it, supports the --combine flag, but does not need it
  344. # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless
  345. ifeq ($(GCC_MAJOR_VER),3)
  346. DOMULTI:=n
  347. else
  348. CFLAGS+=$(call check_gcc,--combine,)
  349. endif
  350. else
  351. DOMULTI:=n
  352. endif
  353. ifeq ($(UCLIBC_HAS_THREADS),y)
  354. ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
  355. PTNAME := nptl
  356. else
  357. ifeq ($(LINUXTHREADS_OLD),y)
  358. PTNAME := linuxthreads.old
  359. else
  360. PTNAME := linuxthreads
  361. endif
  362. endif
  363. PTDIR := $(top_builddir)libpthread/$(PTNAME)
  364. # set up system dependencies include dirs (NOTE: order matters!)
  365. ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
  366. PTINC:= -I$(PTDIR) \
  367. -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
  368. -I$(PTDIR)/sysdeps/$(TARGET_ARCH) \
  369. -I$(PTDIR)/sysdeps/unix/sysv/linux \
  370. -I$(PTDIR)/sysdeps/pthread \
  371. -I$(PTDIR)/sysdeps/pthread/bits \
  372. -I$(PTDIR)/sysdeps/generic \
  373. -I$(top_srcdir)ldso/ldso/$(TARGET_ARCH) \
  374. -I$(top_srcdir)ldso/include
  375. #
  376. # Test for TLS if NPTL support was selected.
  377. #
  378. GCC_HAS_TLS=$(shell \
  379. echo "extern __thread int foo;" | $(CC) -o /dev/null -S -xc - 2>&1)
  380. ifneq ($(GCC_HAS_TLS),)
  381. gcc_tls_test_fail:
  382. @echo "####";
  383. @echo "#### Your compiler does not support TLS and you are trying to build uClibc";
  384. @echo "#### with NPTL support. Upgrade your binutils and gcc to versions which";
  385. @echo "#### support TLS for your architecture. Do not contact uClibc maintainers";
  386. @echo "#### about this problem.";
  387. @echo "####";
  388. @echo "#### Exiting...";
  389. @echo "####";
  390. @exit 1;
  391. endif
  392. else
  393. PTINC := \
  394. -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
  395. -I$(PTDIR)/sysdeps/$(TARGET_ARCH) \
  396. -I$(PTDIR)/sysdeps/unix/sysv/linux \
  397. -I$(PTDIR)/sysdeps/pthread \
  398. -I$(PTDIR) \
  399. -I$(top_builddir)libpthread
  400. endif
  401. CFLAGS+=$(PTINC)
  402. else
  403. PTNAME :=
  404. PTINC :=
  405. endif
  406. # Sigh, some stupid versions of gcc can't seem to cope with '-iwithprefix include'
  407. #CFLAGS+=-iwithprefix include
  408. CFLAGS+=-isystem $(shell $(CC) -print-file-name=include)
  409. ifneq ($(DOASSERTS),y)
  410. CFLAGS+=-DNDEBUG
  411. endif
  412. # moved from ldso/{ldso,libdl}
  413. # BEWARE!!! At least mips* will die if -O0 is used!!!
  414. ifeq ($(TARGET_ARCH),mips)
  415. CFLAGS:=$(CFLAGS:-O0=-O1)
  416. endif
  417. # Keep the check_as from being needlessly executed
  418. ifndef ASFLAGS_NOEXEC
  419. ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
  420. export ASFLAGS_NOEXEC := $(call check_as,--noexecstack)
  421. else
  422. export ASFLAGS_NOEXEC :=
  423. endif
  424. endif
  425. ASFLAGS = $(ASFLAGS_NOEXEC)
  426. LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
  427. LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
  428. LIBGCC_DIR:=$(dir $(LIBGCC))
  429. # moved from libpthread/linuxthreads
  430. ifeq ($(UCLIBC_CTOR_DTOR),y)
  431. SHARED_START_FILES:=$(top_builddir)lib/crti.o $(LIBGCC_DIR)crtbeginS.o
  432. SHARED_END_FILES:=$(LIBGCC_DIR)crtendS.o $(top_builddir)lib/crtn.o
  433. endif
  434. ########################################
  435. #
  436. # uClinux shared lib support
  437. #
  438. ifeq ($(CONFIG_BINFMT_SHARED_FLAT),y)
  439. # For the shared version of this, we specify no stack and its library ID
  440. FLTFLAGS += -s 0
  441. LIBID=1
  442. export LIBID FLTFLAGS
  443. SHARED_TARGET = lib/libc
  444. endif