Rules.mak 14 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435
  1. # Rules.make for uClibc
  2. #
  3. # Copyright (C) 2000 by Lineo, inc.
  4. # Copyright (C) 2000-2005 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. STRIP_FLAGS ?= -x -R .note -R .comment
  35. # Select the compiler needed to build binaries for your development system
  36. HOSTCC = gcc
  37. HOSTCFLAGS = -O2 -Wall
  38. #---------------------------------------------------------
  39. # Nothing beyond this point should ever be touched by mere
  40. # mortals. Unless you hang out with the gods, you should
  41. # probably leave all this stuff alone.
  42. MAJOR_VERSION := 0
  43. MINOR_VERSION := 9
  44. SUBLEVEL := 28
  45. VERSION := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
  46. # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
  47. LC_ALL := C
  48. export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION LC_ALL
  49. LIBC := libc
  50. SHARED_MAJORNAME := $(LIBC).so.$(MAJOR_VERSION)
  51. UCLIBC_LDSO := ld-uClibc.so.$(MAJOR_VERSION)
  52. NONSHARED_LIBNAME := uclibc_nonshared.a
  53. libc := $(top_builddir)lib/$(SHARED_MAJORNAME)
  54. interp := $(top_builddir)lib/interp.os
  55. ldso := $(top_builddir)lib/$(UCLIBC_LDSO)
  56. #LIBS :=$(interp) -L$(top_builddir)lib -lc
  57. LIBS := $(interp) -L$(top_builddir)lib $(libc:.$(MAJOR_VERSION)=)
  58. # Make sure DESTDIR and PREFIX can be used to install
  59. # PREFIX is a uClibcism while DESTDIR is a common GNUism
  60. ifndef PREFIX
  61. PREFIX = $(DESTDIR)
  62. endif
  63. # Pull in the user's uClibc configuration
  64. ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
  65. -include $(top_builddir).config
  66. endif
  67. ifndef CROSS
  68. CROSS=$(subst ",, $(strip $(CROSS_COMPILER_PREFIX)))
  69. endif
  70. # A nifty macro to make testing gcc features easier
  71. check_gcc=$(shell \
  72. if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
  73. then echo "$(1)"; else echo "$(2)"; fi)
  74. check_as=$(shell \
  75. if $(CC) -Wa,$(1) -Wa,-Z -c -o /dev/null -xassembler /dev/null > /dev/null 2>&1; \
  76. then echo "-Wa,$(1)"; fi)
  77. # Setup some shortcuts so that silent mode is silent like it should be
  78. ifeq ($(findstring s,$(MAKEFLAGS)),)
  79. export MAKE_IS_SILENT=n
  80. SECHO=@echo
  81. SHELL_SET_X=set -x
  82. else
  83. export MAKE_IS_SILENT=y
  84. SECHO=-@false
  85. SHELL_SET_X=set +x
  86. endif
  87. # Make certain these contain a final "/", but no "//"s.
  88. TARGET_ARCH:=$(shell grep -s ^TARGET_ARCH $(top_builddir)/.config | sed -e 's/^TARGET_ARCH=//' -e 's/"//g')
  89. TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH))))
  90. RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(RUNTIME_PREFIX))))))
  91. DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(DEVEL_PREFIX))))))
  92. KERNEL_SOURCE:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(KERNEL_SOURCE))))))
  93. export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_SOURCE
  94. ARFLAGS:=cr
  95. OPTIMIZATION:=
  96. PICFLAG:=-fPIC
  97. PIEFLAG_NAME:=-fPIE
  98. # Some nice CPU specific optimizations
  99. ifeq ($(TARGET_ARCH),i386)
  100. OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
  101. OPTIMIZATION+=$(call check_gcc,-falign-jumps=0 -falign-loops=0,-malign-jumps=0 -malign-loops=0)
  102. CPU_CFLAGS-$(CONFIG_386)+=-march=i386
  103. CPU_CFLAGS-$(CONFIG_486)+=-march=i486
  104. CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
  105. CPU_CFLAGS-$(CONFIG_586)+=-march=i586
  106. CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
  107. CPU_CFLAGS-$(CONFIG_686)+=-march=i686
  108. CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
  109. CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
  110. CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
  111. CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
  112. CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-march=i686) $(call check_gcc,-falign-functions=4,-malign-functions=4)
  113. CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686 $(call check_gcc,-falign-functions=0,-malign-functions=0)
  114. CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
  115. CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
  116. CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486) $(call check_gcc,-falign-functions=0,-malign-functions=0)
  117. CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
  118. endif
  119. ifeq ($(TARGET_ARCH),sparc)
  120. CPU_CFLAGS-$(CONFIG_SPARC_V7)+=-mcpu=v7
  121. CPU_CFLAGS-$(CONFIG_SPARC_V8)+=-mcpu=v8
  122. CPU_CFLAGS-$(CONFIG_SPARC_V9)+=-mcpu=v9
  123. CPU_CFLAGS-$(CONFIG_SPARC_V9B)+=$(call check_gcc,-mcpu=v9b,-mcpu=ultrasparc)
  124. endif
  125. ifeq ($(TARGET_ARCH),arm)
  126. OPTIMIZATION+=-fstrict-aliasing
  127. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
  128. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
  129. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
  130. CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
  131. CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
  132. CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
  133. CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
  134. CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4
  135. CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4
  136. CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4
  137. CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv5
  138. CPU_CFLAGS-$(CONFIG_ARM1136JF_S)+=-mtune=arm1136jf-s -march=armv6
  139. CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
  140. CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
  141. CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
  142. CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv4 -Wa,-mcpu=xscale
  143. endif
  144. ifeq ($(TARGET_ARCH),mips)
  145. CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
  146. CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
  147. CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
  148. CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
  149. CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
  150. CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
  151. endif
  152. ifeq ($(TARGET_ARCH),sh)
  153. OPTIMIZATION+=-fstrict-aliasing
  154. OPTIMIZATION+= $(call check_gcc,-mprefergot,)
  155. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
  156. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
  157. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
  158. CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
  159. CPU_CFLAGS-$(CONFIG_SH2)+=-m2
  160. CPU_CFLAGS-$(CONFIG_SH3)+=-m3
  161. ifeq ($(UCLIBC_HAS_FLOATS),y)
  162. CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
  163. CPU_CFLAGS-$(CONFIG_SH4)+=-m4
  164. else
  165. CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
  166. CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
  167. endif
  168. endif
  169. ifeq ($(TARGET_ARCH),sh64)
  170. OPTIMIZATION+=-fstrict-aliasing
  171. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):=-EL
  172. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):=-EB
  173. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
  174. CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
  175. CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
  176. endif
  177. ifeq ($(TARGET_ARCH),h8300)
  178. CPU_LDFLAGS-$(CONFIG_H8300H)+= -ms8300h
  179. CPU_LDFLAGS-$(CONFIG_H8S) += -ms8300s
  180. CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32 -fsigned-char
  181. CPU_CFLAGS-$(CONFIG_H8S) += -ms -mint32 -fsigned-char
  182. endif
  183. ifeq ($(TARGET_ARCH),cris)
  184. CPU_LDFLAGS-$(CONFIG_CRIS)+=-mcrislinux
  185. CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
  186. PICFLAG:=-fpic
  187. PIEFLAG_NAME:=-fpie
  188. endif
  189. ifeq ($(TARGET_ARCH),powerpc)
  190. # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
  191. # enough. Therefore use -fpic which will reduce code size and generates
  192. # faster code.
  193. PICFLAG:=-fpic
  194. PIEFLAG_NAME:=-fpie
  195. endif
  196. ifeq ($(TARGET_ARCH),frv)
  197. CPU_LDFLAGS-$(CONFIG_FRV)+=-melf32frvfd
  198. CPU_CFLAGS-$(CONFIG_FRV)+=-mfdpic
  199. # Using -pie causes the program to have an interpreter, which is
  200. # forbidden, so we must make do with -shared. Unfortunately,
  201. # -shared by itself would get us global function descriptors
  202. # and calls through PLTs, dynamic resolution of symbols, etc,
  203. # which would break as well, but -Bsymbolic comes to the rescue.
  204. export LDPIEFLAG:=-shared -Bsymbolic
  205. UCLIBC_LDSO=ld.so.1
  206. endif
  207. # Keep the check_gcc from being needlessly executed
  208. ifndef PIEFLAG
  209. ifneq ($(UCLIBC_BUILD_PIE),y)
  210. export PIEFLAG:=
  211. else
  212. export PIEFLAG:=$(call check_gcc,$(PIEFLAG_NAME),$(PICFLAG))
  213. endif
  214. endif
  215. # We need to keep track of both the CC PIE flag (above) as
  216. # well as the LD PIE flag (below) because we can't rely on
  217. # gcc passing -pie if we used -fPIE
  218. ifndef LDPIEFLAG
  219. ifneq ($(UCLIBC_BUILD_PIE),y)
  220. export LDPIEFLAG:=
  221. else
  222. export LDPIEFLAG:=$(shell $(LD) --help | grep -q pie && echo "-Wl,-pie")
  223. endif
  224. endif
  225. # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
  226. ifndef ASNEEDED
  227. ifneq ($(UCLIBC_HAS_SSP),y)
  228. export ASNEEDED:=
  229. else
  230. 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 $LD_TMP ) )
  231. endif
  232. endif
  233. # Use '-Os' optimization if available, else use -O2, allow Config to override
  234. OPTIMIZATION+=$(call check_gcc,-Os,-O2)
  235. # Use the gcc 3.4 -funit-at-a-time optimization when available
  236. OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
  237. # Add a bunch of extra pedantic annoyingly strict checks
  238. XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing
  239. XARCH_CFLAGS=$(subst ",, $(strip $(ARCH_CFLAGS)))
  240. CPU_CFLAGS=$(subst ",, $(strip $(CPU_CFLAGS-y)))
  241. LDADD_LIBFLOAT=
  242. ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
  243. # Add -msoft-float to the CPU_FLAGS since ldso and libdl ignore CFLAGS.
  244. # If -msoft-float isn't supported, we want an error anyway.
  245. # Hmm... might need to revisit this for arm since it has 2 different
  246. # soft float encodings.
  247. CPU_CFLAGS += -msoft-float
  248. ifeq ($(TARGET_ARCH),arm)
  249. # No longer needed with current toolchains, but leave it here for now.
  250. # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
  251. # LDADD_LIBFLOAT=-lfloat
  252. endif
  253. endif
  254. SSP_DISABLE_FLAGS?=$(call check_gcc,-fno-stack-protector,)
  255. ifeq ($(UCLIBC_BUILD_SSP),y)
  256. SSP_CFLAGS:=$(call check_gcc,-fno-stack-protector-all,)
  257. SSP_CFLAGS+=$(call check_gcc,-fstack-protector,)
  258. SSP_ALL_CFLAGS?=$(call check_gcc,-fstack-protector-all,)
  259. else
  260. SSP_CFLAGS:=$(SSP_DISABLE_FLAGS)
  261. endif
  262. # Some nice CFLAGS to work with
  263. CFLAGS:=$(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
  264. -fno-builtin -nostdinc -D_LIBC -I$(top_builddir)include -I.
  265. LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -shared --warn-common --warn-once -z combreloc
  266. ifeq ($(UCLIBC_BUILD_RELRO),y)
  267. LDFLAGS_NOSTRIP+=-z relro
  268. endif
  269. ifeq ($(UCLIBC_BUILD_NOW),y)
  270. LDFLAGS_NOSTRIP+=-z now
  271. endif
  272. LDFLAGS:=$(LDFLAGS_NOSTRIP) -z defs
  273. ifeq ($(DODEBUG),y)
  274. #CFLAGS += -g3
  275. CFLAGS += -O0 -g3
  276. STRIPTOOL:= true -Since_we_are_debugging
  277. else
  278. CFLAGS += $(OPTIMIZATION) $(XARCH_CFLAGS)
  279. LDFLAGS += -s
  280. endif
  281. ifeq ($(DOMULTI),y)
  282. # we try to compile all sources at once into an object (IMA), but
  283. # gcc-3.3.x does not support it
  284. # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources
  285. # gcc-4.0.x supports it, supports the --combine flag, but does not need it
  286. # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless
  287. GCC_VER?=$(shell $(CC) -dumpversion | cut -d . -f 1)
  288. ifeq ($(GCC_VER),3)
  289. DOMULTI:=n
  290. else
  291. CFLAGS+=$(call check_gcc,--combine,)
  292. endif
  293. else
  294. DOMULTI:=n
  295. endif
  296. ifeq ($(UCLIBC_HAS_THREADS),y)
  297. ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
  298. PTNAME := nptl
  299. else
  300. ifeq ($(LINUXTHREADS_OLD),y)
  301. PTNAME := linuxthreads.old
  302. else
  303. PTNAME := linuxthreads
  304. endif
  305. endif
  306. PTDIR := $(top_builddir)libpthread/$(PTNAME)
  307. # set up system dependencies include dirs (NOTE: order matters!)
  308. ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
  309. PTINC := \
  310. -I$(PTDIR)/compat \
  311. -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
  312. -I$(PTDIR)/sysdeps/$(TARGET_ARCH) \
  313. -I$(PTDIR)/sysdeps/unix/sysv/linux \
  314. -I$(PTDIR)/sysdeps/pthread \
  315. -I$(PTDIR)/sysdeps/pthread/bits \
  316. -I$(PTDIR)/sysdeps/generic \
  317. -Ildso/include \
  318. -include $(PTDIR)/compat/libc-symbols.h
  319. #
  320. # Test for TLS if NPTL support was selected.
  321. #
  322. GCC_HAS_TLS=$(shell \
  323. echo "extern __thread int foo;" | $(CC) -o /dev/null -S -xc - 2>&1)
  324. ifneq ($(GCC_HAS_TLS),)
  325. gcc_tls_test_fail:
  326. @echo "####";
  327. @echo "#### Your compiler does not support TLS and you are trying to build uClibc";
  328. @echo "#### with NPTL support. Upgrade your binutils and gcc to versions which";
  329. @echo "#### support TLS for your architecture. Do not contact uClibc maintainers";
  330. @echo "#### about this problem.";
  331. @echo "####";
  332. @echo "#### Exiting...";
  333. @echo "####";
  334. @exit 1;
  335. endif
  336. else
  337. PTINC := \
  338. -I$(PTDIR)/sysdeps/$(TARGET_ARCH) \
  339. -I$(PTDIR)/sysdeps/pthread \
  340. -I$(PTDIR)
  341. endif
  342. CFLAGS+=$(PTINC)
  343. else
  344. PTNAME :=
  345. PTINC :=
  346. endif
  347. # Sigh, some stupid versions of gcc can't seem to cope with '-iwithprefix include'
  348. #CFLAGS+=-iwithprefix include
  349. CFLAGS+=-isystem $(shell $(CC) -print-file-name=include)
  350. ifneq ($(DOASSERTS),y)
  351. CFLAGS+=-DNDEBUG
  352. endif
  353. # moved from ldso/{ldso,libdl}
  354. # BEWARE!!! At least mips* will die if -O0 is used!!!
  355. ifeq ($(TARGET_ARCH),mips)
  356. CFLAGS:=$(CFLAGS:-O0=-O1)
  357. endif
  358. # Keep the check_as from being needlessly executed
  359. ifndef ASFLAGS_NOEXEC
  360. ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
  361. export ASFLAGS_NOEXEC := $(call check_as,--noexecstack)
  362. else
  363. export ASFLAGS_NOEXEC :=
  364. endif
  365. endif
  366. ASFLAGS = $(ASFLAGS_NOEXEC)
  367. LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
  368. LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
  369. LIBGCC_DIR:=$(dir $(LIBGCC))
  370. # moved from libpthread/linuxthreads
  371. ifeq ($(UCLIBC_CTOR_DTOR),y)
  372. SHARED_START_FILES:=$(top_builddir)lib/crti.o $(LIBGCC_DIR)crtbeginS.o
  373. SHARED_END_FILES:=$(LIBGCC_DIR)crtendS.o $(top_builddir)lib/crtn.o
  374. endif
  375. ########################################
  376. #
  377. # uClinux shared lib support
  378. #
  379. ifeq ($(CONFIG_BINFMT_SHARED_FLAT),y)
  380. # For the shared version of this, we specify no stack and its library ID
  381. FLTFLAGS += -s 0
  382. LIBID=1
  383. export LIBID FLTFLAGS
  384. SHARED_TARGET = lib/libc
  385. endif