Rules.mak 15 KB

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  1. # Rules.make for uClibc
  2. #
  3. # Copyright (C) 2000 by Lineo, inc.
  4. # Copyright (C) 2000-2006 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. UCLIBC_LDSO_NAME := ld-uClibc
  65. ifeq ($(TARGET_ARCH),x86_64)
  66. UCLIBC_LDSO_NAME := ld64-uClibc
  67. endif
  68. UCLIBC_LDSO := $(UCLIBC_LDSO_NAME).so.$(MAJOR_VERSION)
  69. NONSHARED_LIBNAME := uclibc_nonshared.a
  70. libc := $(top_builddir)lib/$(SHARED_MAJORNAME)
  71. interp := $(top_builddir)lib/interp.os
  72. ldso := $(top_builddir)lib/$(UCLIBC_LDSO)
  73. headers_dep := $(top_builddir)include/bits/sysnum.h
  74. #LIBS :=$(interp) -L$(top_builddir)lib -lc
  75. LIBS := $(interp) -L$(top_builddir)lib $(libc:.$(MAJOR_VERSION)=)
  76. # Make sure DESTDIR and PREFIX can be used to install
  77. # PREFIX is a uClibcism while DESTDIR is a common GNUism
  78. ifndef PREFIX
  79. PREFIX = $(DESTDIR)
  80. endif
  81. ifneq ($(HAVE_SHARED),y)
  82. libc :=
  83. endif
  84. ifndef CROSS
  85. CROSS=$(subst ",, $(strip $(CROSS_COMPILER_PREFIX)))
  86. endif
  87. # A nifty macro to make testing gcc features easier
  88. check_gcc=$(shell \
  89. if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
  90. then echo "$(1)"; else echo "$(2)"; fi)
  91. check_as=$(shell \
  92. if $(CC) -Wa,$(1) -Wa,-Z -c -o /dev/null -xassembler /dev/null > /dev/null 2>&1; \
  93. then echo "-Wa,$(1)"; fi)
  94. # Setup some shortcuts so that silent mode is silent like it should be
  95. ifeq ($(findstring s,$(MAKEFLAGS)),)
  96. export MAKE_IS_SILENT=n
  97. SECHO=@echo
  98. SHELL_SET_X=set -x
  99. else
  100. export MAKE_IS_SILENT=y
  101. SECHO=-@false
  102. SHELL_SET_X=set +x
  103. endif
  104. ARFLAGS:=cr
  105. OPTIMIZATION:=
  106. PICFLAG:=-fPIC
  107. PIEFLAG_NAME:=-fPIE
  108. # Some nice CPU specific optimizations
  109. ifeq ($(TARGET_ARCH),i386)
  110. OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
  111. OPTIMIZATION+=$(call check_gcc,-falign-jumps=0 -falign-loops=0,-malign-jumps=0 -malign-loops=0)
  112. CPU_CFLAGS-$(CONFIG_386)+=-march=i386
  113. CPU_CFLAGS-$(CONFIG_486)+=-march=i486
  114. CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
  115. CPU_CFLAGS-$(CONFIG_586)+=-march=i586
  116. CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
  117. CPU_CFLAGS-$(CONFIG_686)+=-march=i686
  118. CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
  119. CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
  120. CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
  121. CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
  122. CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-march=i686) $(call check_gcc,-falign-functions=4,-malign-functions=4)
  123. CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686 $(call check_gcc,-falign-functions=0,-malign-functions=0)
  124. CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
  125. CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
  126. CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486) $(call check_gcc,-falign-functions=0,-malign-functions=0)
  127. CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
  128. endif
  129. ifeq ($(TARGET_ARCH),sparc)
  130. CPU_CFLAGS-$(CONFIG_SPARC_V7)+=-mcpu=v7
  131. CPU_CFLAGS-$(CONFIG_SPARC_V8)+=-mcpu=v8
  132. CPU_CFLAGS-$(CONFIG_SPARC_V9)+=-mcpu=v9
  133. CPU_CFLAGS-$(CONFIG_SPARC_V9B)+=$(call check_gcc,-mcpu=v9b,-mcpu=ultrasparc)
  134. endif
  135. ifeq ($(TARGET_ARCH),arm)
  136. OPTIMIZATION+=-fstrict-aliasing
  137. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
  138. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
  139. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
  140. CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
  141. CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
  142. CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
  143. CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
  144. CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4
  145. CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4
  146. CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4
  147. CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv5
  148. CPU_CFLAGS-$(CONFIG_ARM1136JF_S)+=-mtune=arm1136jf-s -march=armv6
  149. CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
  150. CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
  151. CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
  152. CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv4 -Wa,-mcpu=xscale
  153. endif
  154. ifeq ($(TARGET_ARCH),mips)
  155. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
  156. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
  157. CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
  158. CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
  159. CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
  160. CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
  161. CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
  162. CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
  163. endif
  164. ifeq ($(TARGET_ARCH),nios)
  165. CPU_LDFLAGS-y+=-m32
  166. CPU_CFLAGS-y+=-m32
  167. endif
  168. ifeq ($(TARGET_ARCH),sh)
  169. OPTIMIZATION+=-fstrict-aliasing
  170. OPTIMIZATION+= $(call check_gcc,-mprefergot,)
  171. CPU_LDFLAGS-$(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_SH2)+=-m2
  176. CPU_CFLAGS-$(CONFIG_SH3)+=-m3
  177. ifeq ($(UCLIBC_HAS_FLOATS),y)
  178. CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
  179. CPU_CFLAGS-$(CONFIG_SH4)+=-m4
  180. else
  181. CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
  182. CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
  183. endif
  184. endif
  185. ifeq ($(TARGET_ARCH),sh64)
  186. OPTIMIZATION+=-fstrict-aliasing
  187. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):=-EL
  188. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):=-EB
  189. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
  190. CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
  191. CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
  192. endif
  193. ifeq ($(TARGET_ARCH),h8300)
  194. CPU_LDFLAGS-$(CONFIG_H8300H)+= -ms8300h
  195. CPU_LDFLAGS-$(CONFIG_H8S) += -ms8300s
  196. CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32
  197. CPU_CFLAGS-$(CONFIG_H8S) += -ms -mint32
  198. endif
  199. ifeq ($(TARGET_ARCH),cris)
  200. CPU_LDFLAGS-$(CONFIG_CRIS)+=-mcrislinux
  201. CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
  202. PICFLAG:=-fpic
  203. PIEFLAG_NAME:=-fpie
  204. endif
  205. ifeq ($(TARGET_ARCH),powerpc)
  206. # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
  207. # enough. Therefore use -fpic which will reduce code size and generates
  208. # faster code.
  209. PICFLAG:=-fpic
  210. PIEFLAG_NAME:=-fpie
  211. endif
  212. ifeq ($(TARGET_ARCH),bfin)
  213. # This should also work, but why bother ? ;)
  214. #PICFLAG:=-fPIC -mid-shared-library
  215. PICFLAG:=-fpic
  216. endif
  217. ifeq ($(TARGET_ARCH),frv)
  218. CPU_LDFLAGS-$(CONFIG_FRV)+=-melf32frvfd
  219. CPU_CFLAGS-$(CONFIG_FRV)+=-mfdpic
  220. # Using -pie causes the program to have an interpreter, which is
  221. # forbidden, so we must make do with -shared. Unfortunately,
  222. # -shared by itself would get us global function descriptors
  223. # and calls through PLTs, dynamic resolution of symbols, etc,
  224. # which would break as well, but -Bsymbolic comes to the rescue.
  225. export LDPIEFLAG:=-shared -Bsymbolic
  226. UCLIBC_LDSO=ld.so.1
  227. endif
  228. # Keep the check_gcc from being needlessly executed
  229. ifndef PIEFLAG
  230. ifneq ($(UCLIBC_BUILD_PIE),y)
  231. export PIEFLAG:=
  232. else
  233. export PIEFLAG:=$(call check_gcc,$(PIEFLAG_NAME),$(PICFLAG))
  234. endif
  235. endif
  236. # We need to keep track of both the CC PIE flag (above) as
  237. # well as the LD PIE flag (below) because we can't rely on
  238. # gcc passing -pie if we used -fPIE
  239. ifndef LDPIEFLAG
  240. ifneq ($(UCLIBC_BUILD_PIE),y)
  241. export LDPIEFLAG:=
  242. else
  243. export LDPIEFLAG:=$(shell $(LD) --help | grep -q pie && echo "-Wl,-pie")
  244. endif
  245. endif
  246. # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
  247. ifndef ASNEEDED
  248. ifneq ($(UCLIBC_HAS_SSP),y)
  249. export ASNEEDED:=
  250. else
  251. 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 $LD_TMP ) )
  252. endif
  253. endif
  254. # Use '-Os' optimization if available, else use -O2, allow Config to override
  255. OPTIMIZATION+=$(call check_gcc,-Os,-O2)
  256. # Use the gcc 3.4 -funit-at-a-time optimization when available
  257. OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
  258. # Add a bunch of extra pedantic annoyingly strict checks
  259. XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing
  260. XWARNINGS+=-Wnested-externs -Wshadow -Wmissing-noreturn -Wmissing-format-attribute -Wformat=2
  261. #XWARNINGS+=-Wmissing-prototypes -Wmissing-declarations
  262. # works only w/ gcc-3.4 and up, can't be checked for gcc-3.x w/ check_gcc()
  263. #XWARNINGS+=-Wdeclaration-after-statement
  264. XARCH_CFLAGS=$(subst ",, $(strip $(ARCH_CFLAGS)))
  265. CPU_CFLAGS=$(subst ",, $(strip $(CPU_CFLAGS-y)))
  266. # Make sure "char" behavior is the same everywhere
  267. CPU_CFLAGS += -fsigned-char
  268. # only i386 is known to work if compile.S gets -D__ASSEMBLER__
  269. #CPU_CFLAGS += -std=c99
  270. LDADD_LIBFLOAT=
  271. ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
  272. # Add -msoft-float to the CPU_FLAGS since ldso and libdl ignore CFLAGS.
  273. # If -msoft-float isn't supported, we want an error anyway.
  274. # Hmm... might need to revisit this for arm since it has 2 different
  275. # soft float encodings.
  276. ifneq ($(TARGET_ARCH),nios)
  277. ifneq ($(TARGET_ARCH),nios2)
  278. CPU_CFLAGS += -msoft-float
  279. endif
  280. endif
  281. ifeq ($(TARGET_ARCH),arm)
  282. # No longer needed with current toolchains, but leave it here for now.
  283. # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
  284. # LDADD_LIBFLOAT=-lfloat
  285. endif
  286. endif
  287. SSP_DISABLE_FLAGS?=$(call check_gcc,-fno-stack-protector,)
  288. ifeq ($(UCLIBC_BUILD_SSP),y)
  289. SSP_CFLAGS:=$(call check_gcc,-fno-stack-protector-all,)
  290. SSP_CFLAGS+=$(call check_gcc,-fstack-protector,)
  291. SSP_ALL_CFLAGS?=$(call check_gcc,-fstack-protector-all,)
  292. else
  293. SSP_CFLAGS:=$(SSP_DISABLE_FLAGS)
  294. endif
  295. # Some nice CFLAGS to work with
  296. CFLAGS:=-include $(top_builddir)include/libc-symbols.h \
  297. $(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
  298. -fno-builtin -nostdinc -I$(top_builddir)include -I.
  299. LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -shared --warn-common --warn-once -z combreloc
  300. ifeq ($(UCLIBC_BUILD_RELRO),y)
  301. LDFLAGS_NOSTRIP+=-z relro
  302. endif
  303. ifeq ($(UCLIBC_BUILD_NOW),y)
  304. LDFLAGS_NOSTRIP+=-z now
  305. endif
  306. LDFLAGS:=$(LDFLAGS_NOSTRIP) -z defs
  307. ifeq ($(DODEBUG),y)
  308. #CFLAGS += -g3
  309. CFLAGS += -O0 -g3
  310. STRIPTOOL:= true -Since_we_are_debugging
  311. else
  312. CFLAGS += $(OPTIMIZATION) $(XARCH_CFLAGS)
  313. LDFLAGS += -s
  314. endif
  315. ifeq ($(DOMULTI),y)
  316. # we try to compile all sources at once into an object (IMA), but
  317. # gcc-3.3.x does not support it
  318. # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources
  319. # gcc-4.0.x supports it, supports the --combine flag, but does not need it
  320. # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless
  321. GCC_VER?=$(shell $(CC) -dumpversion | cut -d . -f 1)
  322. ifeq ($(GCC_VER),3)
  323. DOMULTI:=n
  324. else
  325. CFLAGS+=$(call check_gcc,--combine,)
  326. endif
  327. else
  328. DOMULTI:=n
  329. endif
  330. ifeq ($(UCLIBC_HAS_THREADS),y)
  331. ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
  332. PTNAME := nptl
  333. else
  334. ifeq ($(LINUXTHREADS_OLD),y)
  335. PTNAME := linuxthreads.old
  336. else
  337. PTNAME := linuxthreads
  338. endif
  339. endif
  340. PTDIR := $(top_builddir)libpthread/$(PTNAME)
  341. # set up system dependencies include dirs (NOTE: order matters!)
  342. ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
  343. PTINC:= -I$(PTDIR) \
  344. -I$(PTDIR)/compat \
  345. -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
  346. -I$(PTDIR)/sysdeps/$(TARGET_ARCH) \
  347. -I$(PTDIR)/sysdeps/unix/sysv/linux \
  348. -I$(PTDIR)/sysdeps/pthread \
  349. -I$(PTDIR)/sysdeps/pthread/bits \
  350. -I$(PTDIR)/sysdeps/generic \
  351. -I$(top_srcdir)ldso/ldso/$(TARGET_ARCH) \
  352. -I$(top_srcdir)ldso/include \
  353. -include $(PTDIR)/compat/libc-symbols.h
  354. #
  355. # Test for TLS if NPTL support was selected.
  356. #
  357. GCC_HAS_TLS=$(shell \
  358. echo "extern __thread int foo;" | $(CC) -o /dev/null -S -xc - 2>&1)
  359. ifneq ($(GCC_HAS_TLS),)
  360. gcc_tls_test_fail:
  361. @echo "####";
  362. @echo "#### Your compiler does not support TLS and you are trying to build uClibc";
  363. @echo "#### with NPTL support. Upgrade your binutils and gcc to versions which";
  364. @echo "#### support TLS for your architecture. Do not contact uClibc maintainers";
  365. @echo "#### about this problem.";
  366. @echo "####";
  367. @echo "#### Exiting...";
  368. @echo "####";
  369. @exit 1;
  370. endif
  371. else
  372. PTINC := \
  373. -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
  374. -I$(PTDIR)/sysdeps/$(TARGET_ARCH) \
  375. -I$(PTDIR)/sysdeps/unix/sysv/linux \
  376. -I$(PTDIR)/sysdeps/pthread \
  377. -I$(PTDIR) \
  378. -I$(top_builddir)libpthread
  379. endif
  380. CFLAGS+=$(PTINC)
  381. else
  382. PTNAME :=
  383. PTINC :=
  384. endif
  385. # Sigh, some stupid versions of gcc can't seem to cope with '-iwithprefix include'
  386. #CFLAGS+=-iwithprefix include
  387. CFLAGS+=-isystem $(shell $(CC) -print-file-name=include)
  388. ifneq ($(DOASSERTS),y)
  389. CFLAGS+=-DNDEBUG
  390. endif
  391. # moved from ldso/{ldso,libdl}
  392. # BEWARE!!! At least mips* will die if -O0 is used!!!
  393. ifeq ($(TARGET_ARCH),mips)
  394. CFLAGS:=$(CFLAGS:-O0=-O1)
  395. endif
  396. # Keep the check_as from being needlessly executed
  397. ifndef ASFLAGS_NOEXEC
  398. ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
  399. export ASFLAGS_NOEXEC := $(call check_as,--noexecstack)
  400. else
  401. export ASFLAGS_NOEXEC :=
  402. endif
  403. endif
  404. ASFLAGS = $(ASFLAGS_NOEXEC)
  405. LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
  406. LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
  407. LIBGCC_DIR:=$(dir $(LIBGCC))
  408. # moved from libpthread/linuxthreads
  409. ifeq ($(UCLIBC_CTOR_DTOR),y)
  410. SHARED_START_FILES:=$(top_builddir)lib/crti.o $(LIBGCC_DIR)crtbeginS.o
  411. SHARED_END_FILES:=$(LIBGCC_DIR)crtendS.o $(top_builddir)lib/crtn.o
  412. endif
  413. ########################################
  414. #
  415. # uClinux shared lib support
  416. #
  417. ifeq ($(CONFIG_BINFMT_SHARED_FLAT),y)
  418. # For the shared version of this, we specify no stack and its library ID
  419. FLTFLAGS += -s 0
  420. LIBID=1
  421. export LIBID FLTFLAGS
  422. SHARED_TARGET = lib/libc
  423. endif