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