Rules.mak 15 KB

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  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. BUILD_CFLAGS = -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. headers_dep := $(top_builddir)include/bits/sysnum.h
  57. #LIBS :=$(interp) -L$(top_builddir)lib -lc
  58. LIBS := $(interp) -L$(top_builddir)lib $(libc:.$(MAJOR_VERSION)=)
  59. # Make sure DESTDIR and PREFIX can be used to install
  60. # PREFIX is a uClibcism while DESTDIR is a common GNUism
  61. ifndef PREFIX
  62. PREFIX = $(DESTDIR)
  63. endif
  64. # Pull in the user's uClibc configuration
  65. ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
  66. -include $(top_builddir).config
  67. endif
  68. ifndef CROSS
  69. CROSS=$(subst ",, $(strip $(CROSS_COMPILER_PREFIX)))
  70. endif
  71. # A nifty macro to make testing gcc features easier
  72. check_gcc=$(shell \
  73. if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
  74. then echo "$(1)"; else echo "$(2)"; fi)
  75. check_as=$(shell \
  76. if $(CC) -Wa,$(1) -Wa,-Z -c -o /dev/null -xassembler /dev/null > /dev/null 2>&1; \
  77. then echo "-Wa,$(1)"; fi)
  78. # Setup some shortcuts so that silent mode is silent like it should be
  79. ifeq ($(findstring s,$(MAKEFLAGS)),)
  80. export MAKE_IS_SILENT=n
  81. SECHO=@echo
  82. SHELL_SET_X=set -x
  83. else
  84. export MAKE_IS_SILENT=y
  85. SECHO=-@false
  86. SHELL_SET_X=set +x
  87. endif
  88. # Make certain these contain a final "/", but no "//"s.
  89. TARGET_ARCH:=$(shell grep -s '^TARGET_ARCH' $(top_builddir)/.config | sed -e 's/^TARGET_ARCH=//' -e 's/"//g')
  90. TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH))))
  91. RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(RUNTIME_PREFIX))))))
  92. DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(DEVEL_PREFIX))))))
  93. KERNEL_SOURCE:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(KERNEL_SOURCE))))))
  94. export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_SOURCE
  95. ARFLAGS:=cr
  96. OPTIMIZATION:=
  97. PICFLAG:=-fPIC
  98. PIEFLAG_NAME:=-fPIE
  99. # Some nice CPU specific optimizations
  100. ifeq ($(TARGET_ARCH),i386)
  101. OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
  102. OPTIMIZATION+=$(call check_gcc,-falign-jumps=0 -falign-loops=0,-malign-jumps=0 -malign-loops=0)
  103. CPU_CFLAGS-$(CONFIG_386)+=-march=i386
  104. CPU_CFLAGS-$(CONFIG_486)+=-march=i486
  105. CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
  106. CPU_CFLAGS-$(CONFIG_586)+=-march=i586
  107. CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
  108. CPU_CFLAGS-$(CONFIG_686)+=-march=i686
  109. CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
  110. CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
  111. CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
  112. CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
  113. CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-march=i686) $(call check_gcc,-falign-functions=4,-malign-functions=4)
  114. CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686 $(call check_gcc,-falign-functions=0,-malign-functions=0)
  115. CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
  116. CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
  117. CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486) $(call check_gcc,-falign-functions=0,-malign-functions=0)
  118. CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
  119. endif
  120. ifeq ($(TARGET_ARCH),sparc)
  121. CPU_CFLAGS-$(CONFIG_SPARC_V7)+=-mcpu=v7
  122. CPU_CFLAGS-$(CONFIG_SPARC_V8)+=-mcpu=v8
  123. CPU_CFLAGS-$(CONFIG_SPARC_V9)+=-mcpu=v9
  124. CPU_CFLAGS-$(CONFIG_SPARC_V9B)+=$(call check_gcc,-mcpu=v9b,-mcpu=ultrasparc)
  125. endif
  126. ifeq ($(TARGET_ARCH),arm)
  127. OPTIMIZATION+=-fstrict-aliasing
  128. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
  129. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
  130. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
  131. CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
  132. CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
  133. CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
  134. CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
  135. CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4
  136. CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4
  137. CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4
  138. CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv5
  139. CPU_CFLAGS-$(CONFIG_ARM1136JF_S)+=-mtune=arm1136jf-s -march=armv6
  140. CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
  141. CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
  142. CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
  143. CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv4 -Wa,-mcpu=xscale
  144. endif
  145. ifeq ($(TARGET_ARCH),mips)
  146. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
  147. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
  148. CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
  149. CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
  150. CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
  151. CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
  152. CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
  153. CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
  154. endif
  155. ifeq ($(TARGET_ARCH),nios)
  156. CPU_LDFLAGS-y+=-m32
  157. CPU_CFLAGS-y+=-m32
  158. endif
  159. ifeq ($(TARGET_ARCH),sh)
  160. OPTIMIZATION+=-fstrict-aliasing
  161. OPTIMIZATION+= $(call check_gcc,-mprefergot,)
  162. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
  163. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
  164. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
  165. CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
  166. CPU_CFLAGS-$(CONFIG_SH2)+=-m2
  167. CPU_CFLAGS-$(CONFIG_SH3)+=-m3
  168. ifeq ($(UCLIBC_HAS_FLOATS),y)
  169. CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
  170. CPU_CFLAGS-$(CONFIG_SH4)+=-m4
  171. else
  172. CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
  173. CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
  174. endif
  175. endif
  176. ifeq ($(TARGET_ARCH),sh64)
  177. OPTIMIZATION+=-fstrict-aliasing
  178. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):=-EL
  179. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):=-EB
  180. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
  181. CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
  182. CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
  183. endif
  184. ifeq ($(TARGET_ARCH),h8300)
  185. CPU_LDFLAGS-$(CONFIG_H8300H)+= -ms8300h
  186. CPU_LDFLAGS-$(CONFIG_H8S) += -ms8300s
  187. CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32 -fsigned-char
  188. CPU_CFLAGS-$(CONFIG_H8S) += -ms -mint32 -fsigned-char
  189. endif
  190. ifeq ($(TARGET_ARCH),cris)
  191. CPU_LDFLAGS-$(CONFIG_CRIS)+=-mcrislinux
  192. CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
  193. PICFLAG:=-fpic
  194. PIEFLAG_NAME:=-fpie
  195. endif
  196. ifeq ($(TARGET_ARCH),powerpc)
  197. # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
  198. # enough. Therefore use -fpic which will reduce code size and generates
  199. # faster code.
  200. PICFLAG:=-fpic
  201. PIEFLAG_NAME:=-fpie
  202. endif
  203. ifeq ($(TARGET_ARCH),frv)
  204. CPU_LDFLAGS-$(CONFIG_FRV)+=-melf32frvfd
  205. CPU_CFLAGS-$(CONFIG_FRV)+=-mfdpic
  206. # Using -pie causes the program to have an interpreter, which is
  207. # forbidden, so we must make do with -shared. Unfortunately,
  208. # -shared by itself would get us global function descriptors
  209. # and calls through PLTs, dynamic resolution of symbols, etc,
  210. # which would break as well, but -Bsymbolic comes to the rescue.
  211. export LDPIEFLAG:=-shared -Bsymbolic
  212. UCLIBC_LDSO=ld.so.1
  213. endif
  214. # Keep the check_gcc from being needlessly executed
  215. ifndef PIEFLAG
  216. ifneq ($(UCLIBC_BUILD_PIE),y)
  217. export PIEFLAG:=
  218. else
  219. export PIEFLAG:=$(call check_gcc,$(PIEFLAG_NAME),$(PICFLAG))
  220. endif
  221. endif
  222. # We need to keep track of both the CC PIE flag (above) as
  223. # well as the LD PIE flag (below) because we can't rely on
  224. # gcc passing -pie if we used -fPIE
  225. ifndef LDPIEFLAG
  226. ifneq ($(UCLIBC_BUILD_PIE),y)
  227. export LDPIEFLAG:=
  228. else
  229. export LDPIEFLAG:=$(shell $(LD) --help | grep -q pie && echo "-Wl,-pie")
  230. endif
  231. endif
  232. # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
  233. ifndef ASNEEDED
  234. ifneq ($(UCLIBC_HAS_SSP),y)
  235. export ASNEEDED:=
  236. else
  237. 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 $LD_TMP ) )
  238. endif
  239. endif
  240. # Use '-Os' optimization if available, else use -O2, allow Config to override
  241. OPTIMIZATION+=$(call check_gcc,-Os,-O2)
  242. # Use the gcc 3.4 -funit-at-a-time optimization when available
  243. OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
  244. # Add a bunch of extra pedantic annoyingly strict checks
  245. XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing
  246. XARCH_CFLAGS=$(subst ",, $(strip $(ARCH_CFLAGS)))
  247. CPU_CFLAGS=$(subst ",, $(strip $(CPU_CFLAGS-y)))
  248. LDADD_LIBFLOAT=
  249. ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
  250. # Add -msoft-float to the CPU_FLAGS since ldso and libdl ignore CFLAGS.
  251. # If -msoft-float isn't supported, we want an error anyway.
  252. # Hmm... might need to revisit this for arm since it has 2 different
  253. # soft float encodings.
  254. ifneq ($(TARGET_ARCH),nios)
  255. ifneq ($(TARGET_ARCH),nios2)
  256. CPU_CFLAGS += -msoft-float
  257. endif
  258. endif
  259. ifeq ($(TARGET_ARCH),arm)
  260. # No longer needed with current toolchains, but leave it here for now.
  261. # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
  262. # LDADD_LIBFLOAT=-lfloat
  263. endif
  264. endif
  265. SSP_DISABLE_FLAGS?=$(call check_gcc,-fno-stack-protector,)
  266. ifeq ($(UCLIBC_BUILD_SSP),y)
  267. SSP_CFLAGS:=$(call check_gcc,-fno-stack-protector-all,)
  268. SSP_CFLAGS+=$(call check_gcc,-fstack-protector,)
  269. SSP_ALL_CFLAGS?=$(call check_gcc,-fstack-protector-all,)
  270. else
  271. SSP_CFLAGS:=$(SSP_DISABLE_FLAGS)
  272. endif
  273. # Some nice CFLAGS to work with
  274. CFLAGS:=$(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
  275. -fno-builtin -nostdinc -D_LIBC -I$(top_builddir)include -I.
  276. LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -shared --warn-common --warn-once -z combreloc
  277. ifeq ($(UCLIBC_BUILD_RELRO),y)
  278. LDFLAGS_NOSTRIP+=-z relro
  279. endif
  280. ifeq ($(UCLIBC_BUILD_NOW),y)
  281. LDFLAGS_NOSTRIP+=-z now
  282. endif
  283. LDFLAGS:=$(LDFLAGS_NOSTRIP) -z defs
  284. ifeq ($(DODEBUG),y)
  285. #CFLAGS += -g3
  286. CFLAGS += -O0 -g3
  287. STRIPTOOL:= true -Since_we_are_debugging
  288. else
  289. CFLAGS += $(OPTIMIZATION) $(XARCH_CFLAGS)
  290. LDFLAGS += -s
  291. endif
  292. ifeq ($(DOMULTI),y)
  293. # we try to compile all sources at once into an object (IMA), but
  294. # gcc-3.3.x does not support it
  295. # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources
  296. # gcc-4.0.x supports it, supports the --combine flag, but does not need it
  297. # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless
  298. GCC_VER?=$(shell $(CC) -dumpversion | cut -d . -f 1)
  299. ifeq ($(GCC_VER),3)
  300. DOMULTI:=n
  301. else
  302. CFLAGS+=$(call check_gcc,--combine,)
  303. endif
  304. else
  305. DOMULTI:=n
  306. endif
  307. ifeq ($(UCLIBC_HAS_THREADS),y)
  308. ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
  309. PTNAME := nptl
  310. else
  311. ifeq ($(LINUXTHREADS_OLD),y)
  312. PTNAME := linuxthreads.old
  313. else
  314. PTNAME := linuxthreads
  315. endif
  316. endif
  317. PTDIR := $(top_builddir)libpthread/$(PTNAME)
  318. # set up system dependencies include dirs (NOTE: order matters!)
  319. ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
  320. PTINC:= -I$(PTDIR) \
  321. -I$(PTDIR)/compat \
  322. -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
  323. -I$(PTDIR)/sysdeps/$(TARGET_ARCH) \
  324. -I$(PTDIR)/sysdeps/unix/sysv/linux \
  325. -I$(PTDIR)/sysdeps/pthread \
  326. -I$(PTDIR)/sysdeps/pthread/bits \
  327. -I$(PTDIR)/sysdeps/generic \
  328. -I$(top_srcdir)ldso/ldso/$(TARGET_ARCH) \
  329. -I$(top_srcdir)ldso/include \
  330. -include $(PTDIR)/compat/libc-symbols.h
  331. #
  332. # Test for TLS if NPTL support was selected.
  333. #
  334. GCC_HAS_TLS=$(shell \
  335. echo "extern __thread int foo;" | $(CC) -o /dev/null -S -xc - 2>&1)
  336. ifneq ($(GCC_HAS_TLS),)
  337. gcc_tls_test_fail:
  338. @echo "####";
  339. @echo "#### Your compiler does not support TLS and you are trying to build uClibc";
  340. @echo "#### with NPTL support. Upgrade your binutils and gcc to versions which";
  341. @echo "#### support TLS for your architecture. Do not contact uClibc maintainers";
  342. @echo "#### about this problem.";
  343. @echo "####";
  344. @echo "#### Exiting...";
  345. @echo "####";
  346. @exit 1;
  347. endif
  348. else
  349. PTINC := \
  350. -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
  351. -I$(PTDIR)/sysdeps/$(TARGET_ARCH) \
  352. -I$(PTDIR)/sysdeps/unix/sysv/linux \
  353. -I$(PTDIR)/sysdeps/pthread \
  354. -I$(PTDIR) \
  355. -I$(top_builddir)libpthread
  356. endif
  357. CFLAGS+=$(PTINC)
  358. else
  359. PTNAME :=
  360. PTINC :=
  361. endif
  362. # Sigh, some stupid versions of gcc can't seem to cope with '-iwithprefix include'
  363. #CFLAGS+=-iwithprefix include
  364. CFLAGS+=-isystem $(shell $(CC) -print-file-name=include)
  365. ifneq ($(DOASSERTS),y)
  366. CFLAGS+=-DNDEBUG
  367. endif
  368. ifneq ($(strip $(C_SYMBOL_PREFIX)),"")
  369. CFLAGS+=-D__SYMBOL_PREFIX=1
  370. endif
  371. # moved from ldso/{ldso,libdl}
  372. # BEWARE!!! At least mips* will die if -O0 is used!!!
  373. ifeq ($(TARGET_ARCH),mips)
  374. CFLAGS:=$(CFLAGS:-O0=-O1)
  375. endif
  376. # Keep the check_as from being needlessly executed
  377. ifndef ASFLAGS_NOEXEC
  378. ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
  379. export ASFLAGS_NOEXEC := $(call check_as,--noexecstack)
  380. else
  381. export ASFLAGS_NOEXEC :=
  382. endif
  383. endif
  384. ASFLAGS = $(ASFLAGS_NOEXEC)
  385. LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
  386. LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
  387. LIBGCC_DIR:=$(dir $(LIBGCC))
  388. # moved from libpthread/linuxthreads
  389. ifeq ($(UCLIBC_CTOR_DTOR),y)
  390. SHARED_START_FILES:=$(top_builddir)lib/crti.o $(LIBGCC_DIR)crtbeginS.o
  391. SHARED_END_FILES:=$(LIBGCC_DIR)crtendS.o $(top_builddir)lib/crtn.o
  392. endif
  393. ########################################
  394. #
  395. # uClinux shared lib support
  396. #
  397. ifeq ($(CONFIG_BINFMT_SHARED_FLAT),y)
  398. # For the shared version of this, we specify no stack and its library ID
  399. FLTFLAGS += -s 0
  400. LIBID=1
  401. export LIBID FLTFLAGS
  402. SHARED_TARGET = lib/libc
  403. endif