Rules.mak 23 KB

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  1. # Rules.make for uClibc
  2. #
  3. # Copyright (C) 2000-2008 Erik Andersen <andersen@uclibc.org>
  4. #
  5. # Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
  6. #
  7. # make nano-doc
  8. # FOO = bar -- recursively expanded variable. Value is remebered verbatim.
  9. # If it contains references to other variables, these references
  10. # are expanded whenever this variable is _substituted_.
  11. # FOO := bar -- simply expanded variable. Right hand is expanded when
  12. # the variable is _defined_. Therefore faster than =.
  13. # FOO ?= bar -- set a value only if it is not already set
  14. # (behaves as =, not :=).
  15. # FOO += bar -- append; if FOO is not defined, acts like = (not :=).
  16. # check for proper make version
  17. ifneq ($(findstring x3.7,x$(MAKE_VERSION)),)
  18. $(error Your make is too old $(MAKE_VERSION). Go get at least 3.80)
  19. endif
  20. #-----------------------------------------------------------
  21. # This file contains rules which are shared between multiple
  22. # Makefiles. All normal configuration options live in the
  23. # file named ".config". Don't mess with this file unless
  24. # you know what you are doing.
  25. #-----------------------------------------------------------
  26. # If you are running a cross compiler, you will want to set
  27. # 'CROSS' to something more interesting ... Target
  28. # architecture is determined by asking the CC compiler what
  29. # arch it compiles things for, so unless your compiler is
  30. # broken, you should not need to specify TARGET_ARCH.
  31. #
  32. # Most people will set this stuff on the command line, i.e.
  33. # make CROSS=arm-linux-
  34. # will build uClibc for 'arm'.
  35. ifndef CROSS
  36. CROSS=
  37. endif
  38. CC = $(CROSS)gcc
  39. AR = $(CROSS)ar
  40. LD = $(CROSS)ld
  41. NM = $(CROSS)nm
  42. STRIPTOOL = $(CROSS)strip
  43. INSTALL = install
  44. LN = ln
  45. RM = rm -f
  46. TAR = tar
  47. SED = sed
  48. AWK = awk
  49. STRIP_FLAGS ?= -x -R .note -R .comment
  50. ## unused? if yes, remove after 0.9.31
  51. ## UNIFDEF := $(top_builddir)extra/scripts/unifdef
  52. # Select the compiler needed to build binaries for your development system
  53. HOSTCC = gcc
  54. BUILD_CFLAGS = -Os -Wall
  55. #---------------------------------------------------------
  56. # Nothing beyond this point should ever be touched by mere
  57. # mortals. Unless you hang out with the gods, you should
  58. # probably leave all this stuff alone.
  59. # strip quotes
  60. qstrip = $(strip $(subst ",,$(1)))
  61. #"))
  62. # Pull in the user's uClibc configuration
  63. ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
  64. -include $(top_builddir).config
  65. endif
  66. TARGET_ARCH:=$(call qstrip,$(TARGET_ARCH))
  67. ifeq ($(TARGET_ARCH),)
  68. ARCH ?= $(shell uname -m | $(SED) -e s/i.86/i386/ \
  69. -e s/sun.*/sparc/ -e s/sparc.*/sparc/ \
  70. -e s/arm.*/arm/ -e s/sa110/arm/ \
  71. -e s/sh.*/sh/ \
  72. -e s/s390x/s390/ -e s/parisc.*/hppa/ \
  73. -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
  74. -e s/xtensa.*/xtensa/ )
  75. else
  76. ARCH = $(TARGET_ARCH)
  77. endif
  78. export ARCH
  79. # Make certain these contain a final "/", but no "//"s.
  80. TARGET_SUBARCH:=$(call qstrip,$(shell grep -s '^TARGET_SUBARCH' $(top_builddir)/.config | $(SED) -e 's/^TARGET_SUBARCH=//'))
  81. TARGET_SUBARCH:=$(call qstrip,$(TARGET_SUBARCH))
  82. RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(call qstrup,$(RUNTIME_PREFIX)))))
  83. DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(call qstrip,$(DEVEL_PREFIX)))))
  84. KERNEL_HEADERS:=$(strip $(subst //,/, $(subst ,/, $(call qstrip,$(KERNEL_HEADERS)))))
  85. export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_HEADERS
  86. # Now config hard core
  87. MAJOR_VERSION := 0
  88. MINOR_VERSION := 9
  89. SUBLEVEL := 30
  90. EXTRAVERSION :=-git
  91. VERSION := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
  92. ifneq ($(EXTRAVERSION),)
  93. VERSION := $(VERSION)$(EXTRAVERSION)
  94. endif
  95. # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
  96. LC_ALL := C
  97. export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION LC_ALL
  98. LIBC := libc
  99. SHARED_MAJORNAME := $(LIBC).so.$(MAJOR_VERSION)
  100. ifneq ($(findstring $(TARGET_ARCH) , hppa64 ia64 mips64 powerpc64 s390x sparc64 x86_64 ),)
  101. UCLIBC_LDSO_NAME := ld64-uClibc
  102. ARCH_NATIVE_BIT := 64
  103. else
  104. UCLIBC_LDSO_NAME := ld-uClibc
  105. ARCH_NATIVE_BIT := 32
  106. endif
  107. UCLIBC_LDSO := $(UCLIBC_LDSO_NAME).so.$(MAJOR_VERSION)
  108. NONSHARED_LIBNAME := uclibc_nonshared.a
  109. libc := $(top_builddir)lib/$(SHARED_MAJORNAME)
  110. libc.depend := $(top_builddir)lib/$(SHARED_MAJORNAME:.$(MAJOR_VERSION)=)
  111. interp := $(top_builddir)lib/interp.os
  112. ldso := $(top_builddir)lib/$(UCLIBC_LDSO)
  113. headers_dep := $(top_builddir)include/bits/sysnum.h
  114. sub_headers := $(headers_dep)
  115. #LIBS :=$(interp) -L$(top_builddir)lib -lc
  116. LIBS := $(interp) -L$(top_builddir)lib $(libc:.$(MAJOR_VERSION)=)
  117. # Make sure DESTDIR and PREFIX can be used to install
  118. # PREFIX is a uClibcism while DESTDIR is a common GNUism
  119. ifndef PREFIX
  120. PREFIX = $(DESTDIR)
  121. endif
  122. ifneq ($(HAVE_SHARED),y)
  123. libc :=
  124. interp :=
  125. ldso :=
  126. endif
  127. comma:=,
  128. space:= #
  129. ifndef CROSS
  130. CROSS=$(call qstrip,$(CROSS_COMPILER_PREFIX))
  131. endif
  132. # A nifty macro to make testing gcc features easier
  133. check_gcc=$(shell \
  134. if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
  135. then echo "$(1)"; else echo "$(2)"; fi)
  136. check_as=$(shell \
  137. if $(CC) -Wa,$(1) -Wa,-Z -c -o /dev/null -xassembler /dev/null > /dev/null 2>&1; \
  138. then echo "-Wa,$(1)"; fi)
  139. check_ld=$(shell \
  140. if $(LD) $(1) -o /dev/null -b binary /dev/null > /dev/null 2>&1; \
  141. then echo "$(1)"; fi)
  142. ARFLAGS:=cr
  143. # Flags in OPTIMIZATION are used only for non-debug builds
  144. OPTIMIZATION:=
  145. # Use '-Os' optimization if available, else use -O2, allow Config to override
  146. OPTIMIZATION+=$(call check_gcc,-Os,-O2)
  147. # Use the gcc 3.4 -funit-at-a-time optimization when available
  148. OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
  149. GCC_MAJOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 1)
  150. #GCC_MINOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 2)
  151. ifeq ($(GCC_MAJOR_VER),4)
  152. # shrinks code, results are from 4.0.2
  153. # 0.36%
  154. OPTIMIZATION+=$(call check_gcc,-fno-tree-loop-optimize,)
  155. # 0.34%
  156. OPTIMIZATION+=$(call check_gcc,-fno-tree-dominator-opts,)
  157. # 0.1%
  158. OPTIMIZATION+=$(call check_gcc,-fno-strength-reduce,)
  159. endif
  160. # CPU_CFLAGS-y contain options which are not warnings,
  161. # not include or library paths, and not optimizations.
  162. # Why -funsigned-char: I hunted a bug related to incorrect
  163. # sign extension of 'char' type for 10 hours straight. Not fun.
  164. CPU_CFLAGS-y := -funsigned-char -fno-builtin
  165. CPU_CFLAGS-y += $(call check_gcc,-fno-asm,)
  166. LDADD_LIBFLOAT=
  167. ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
  168. # If -msoft-float isn't supported, we want an error anyway.
  169. # Hmm... might need to revisit this for arm since it has 2 different
  170. # soft float encodings.
  171. ifneq ($(TARGET_ARCH),nios)
  172. ifneq ($(TARGET_ARCH),nios2)
  173. ifneq ($(TARGET_ARCH),sh)
  174. CPU_CFLAGS-y += -msoft-float
  175. endif
  176. endif
  177. endif
  178. ifeq ($(TARGET_ARCH),arm)
  179. # No longer needed with current toolchains, but leave it here for now.
  180. # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
  181. # LDADD_LIBFLOAT=-lfloat
  182. endif
  183. endif
  184. CPU_CFLAGS-y += $(call check_gcc,-std=gnu99,)
  185. CPU_CFLAGS-$(UCLIBC_FORMAT_SHARED_FLAT) += -mid-shared-library
  186. CPU_CFLAGS-$(UCLIBC_FORMAT_FLAT_SEP_DATA) += -msep-data
  187. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN) += -Wl,-EL
  188. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN) += -Wl,-EB
  189. PICFLAG-y := -fPIC
  190. PICFLAG-$(UCLIBC_FORMAT_FDPIC_ELF) := -mfdpic
  191. PICFLAG := $(PICFLAG-y)
  192. PIEFLAG_NAME:=-fPIE
  193. # Some nice CPU specific optimizations
  194. ifeq ($(TARGET_ARCH),i386)
  195. OPTIMIZATION+=$(call check_gcc,-fomit-frame-pointer,)
  196. ifeq ($(CONFIG_386)$(CONFIG_486)$(CONFIG_586)$(CONFIG_586MMX),y)
  197. # Non-SSE capable processor.
  198. # NB: this may make SSE insns segfault!
  199. # -O1 -march=pentium3, -Os -msse etc are known to be affected.
  200. # See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685
  201. # -m32 is needed if host is 64-bit
  202. OPTIMIZATION+=$(call check_gcc,-m32 -mpreferred-stack-boundary=2,)
  203. else
  204. OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=4,)
  205. endif
  206. # Choice of alignment (please document why!)
  207. # -falign-labels: in-line labels
  208. # (reachable by normal code flow, aligning will insert nops
  209. # which will be executed - may even make things slower)
  210. # -falign-jumps: reachable only by a jump
  211. # Generic: no alignment at all (smallest code)
  212. GCC_FALIGN=$(call check_gcc,-falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1,-malign-jumps=1 -malign-loops=1)
  213. ifeq ($(CONFIG_K7),y)
  214. # Align functions to four bytes, use default for jumps and loops (why?)
  215. GCC_FALIGN=$(call check_gcc,-falign-functions=4 -falign-labels=1,-malign-functions=4)
  216. endif
  217. ifeq ($(CONFIG_CRUSOE),y)
  218. # Use compiler's default for functions, jumps and loops (why?)
  219. GCC_FALIGN=$(call check_gcc,-falign-functions=0 -falign-labels=1,-malign-functions=0)
  220. endif
  221. ifeq ($(CONFIG_CYRIXIII),y)
  222. # Use compiler's default for functions, jumps and loops (why?)
  223. GCC_FALIGN=$(call check_gcc,-falign-functions=0 -falign-labels=1,-malign-functions=0)
  224. endif
  225. OPTIMIZATION+=$(GCC_FALIGN)
  226. # Putting each function and data object into its own section
  227. # allows for kbytes of less text if users link against static uclibc
  228. # using ld --gc-sections.
  229. # ld 2.18 can't do that (yet?) for shared libraries, so we itself
  230. # do not use --gc-sections at shared lib link time.
  231. # However, in combination with sections being sorted by alignment
  232. # it does result in much reduced padding:
  233. # text data bss dec hex
  234. # 235319 1472 5992 242783 3b45f old.so
  235. # 234104 1472 5980 241556 3af94 new.so
  236. # Without -ffunction-sections, all functions will get aligned
  237. # to 4 byte boundary by as/ld. This is arguably a bug in as.
  238. # It specifies 4 byte align for .text even if not told to do so:
  239. # Idx Name Size VMA LMA File off Algn
  240. # 0 .text xxxxxxxx 00000000 00000000 xxxxxxxx 2**2 <===!
  241. CPU_CFLAGS-y += $(call check_gcc,-ffunction-sections -fdata-sections,)
  242. ifneq ($(call check_ld,--sort-common),)
  243. CPU_LDFLAGS-y += -Wl,--sort-common
  244. endif
  245. ifneq ($(call check_ld,--sort-section alignment),)
  246. CPU_LDFLAGS-y += -Wl,--sort-section,alignment
  247. endif
  248. CPU_LDFLAGS-y+=-m32
  249. CPU_CFLAGS-y+=-m32
  250. CPU_CFLAGS-$(CONFIG_386)+=-march=i386
  251. CPU_CFLAGS-$(CONFIG_486)+=-march=i486
  252. CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
  253. CPU_CFLAGS-$(CONFIG_586)+=-march=i586
  254. CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
  255. CPU_CFLAGS-$(CONFIG_686)+=-march=i686
  256. CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
  257. CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
  258. CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
  259. CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
  260. CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-march=i686)
  261. CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686
  262. CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
  263. CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
  264. CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486)
  265. CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
  266. endif
  267. ifeq ($(TARGET_ARCH),sparc)
  268. CPU_CFLAGS-$(CONFIG_SPARC_V7)+=-mcpu=v7
  269. CPU_CFLAGS-$(CONFIG_SPARC_V8)+=-mcpu=v8
  270. CPU_CFLAGS-$(CONFIG_SPARC_V9)+=-mcpu=v9
  271. CPU_CFLAGS-$(CONFIG_SPARC_V9B)+=$(call check_gcc,-mcpu=v9b,-mcpu=ultrasparc)
  272. endif
  273. ifeq ($(TARGET_ARCH),arm)
  274. OPTIMIZATION+=-fstrict-aliasing
  275. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
  276. CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
  277. CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
  278. CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
  279. CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
  280. CPU_CFLAGS-$(CONFIG_ARM7TDMI)+=-mtune=arm7tdmi -march=armv4t
  281. CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4t
  282. CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4t
  283. CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4t
  284. CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv5t
  285. CPU_CFLAGS-$(CONFIG_ARM10T)+=-mtune=arm10tdmi -march=armv5t
  286. CPU_CFLAGS-$(CONFIG_ARM1136JF_S)+=-mtune=arm1136jf-s -march=armv6
  287. CPU_CFLAGS-$(CONFIG_ARM1176JZ_S)+=-mtune=arm1176jz-s -march=armv6
  288. CPU_CFLAGS-$(CONFIG_ARM1176JZF_S)+=-mtune=arm1176jzf-s -march=armv6
  289. CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
  290. CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
  291. CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
  292. CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv5te -Wa,-mcpu=xscale
  293. CPU_CFLAGS-$(CONFIG_ARM_IWMMXT)+=-march=iwmmxt -Wa,-mcpu=iwmmxt -mabi=iwmmxt
  294. CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M3)+=-mcpu=cortex-m3 -mthumb
  295. CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M1)+=-mcpu=cortex-m1 -mthumb
  296. endif
  297. ifeq ($(TARGET_ARCH),mips)
  298. CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
  299. CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
  300. CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
  301. CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
  302. CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
  303. CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32R2)+=-march=mips32r2 -mtune=mips32r2
  304. CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
  305. ifeq ($(strip $(ARCH_BIG_ENDIAN)),y)
  306. CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64btsmip
  307. CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32btsmip
  308. endif
  309. ifeq ($(strip $(ARCH_LITTLE_ENDIAN)),y)
  310. CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64ltsmip
  311. CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32ltsmip
  312. endif
  313. CPU_CFLAGS-$(CONFIG_MIPS_N64_ABI)+=-mabi=64
  314. CPU_CFLAGS-$(CONFIG_MIPS_O32_ABI)+=-mabi=32
  315. CPU_CFLAGS-$(CONFIG_MIPS_N32_ABI)+=-mabi=n32
  316. endif
  317. ifeq ($(TARGET_ARCH),nios)
  318. CPU_LDFLAGS-y+=-Wl,-m32
  319. CPU_CFLAGS-y+=-Wl,-m32
  320. endif
  321. ifeq ($(TARGET_ARCH),sh)
  322. OPTIMIZATION+=-fstrict-aliasing
  323. OPTIMIZATION+= $(call check_gcc,-mprefergot,)
  324. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
  325. CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
  326. CPU_CFLAGS-$(CONFIG_SH2)+=-m2
  327. CPU_CFLAGS-$(CONFIG_SH3)+=-m3
  328. ifeq ($(UCLIBC_HAS_FPU),y)
  329. CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
  330. CPU_CFLAGS-$(CONFIG_SH4)+=-m4
  331. else
  332. CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
  333. CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
  334. endif
  335. endif
  336. ifeq ($(TARGET_ARCH),sh64)
  337. OPTIMIZATION+=-fstrict-aliasing
  338. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
  339. CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
  340. CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
  341. endif
  342. ifeq ($(TARGET_ARCH),h8300)
  343. SYMBOL_PREFIX=_
  344. CPU_LDFLAGS-$(CONFIG_H8300H)+= -Wl,-ms8300h
  345. CPU_LDFLAGS-$(CONFIG_H8S) += -Wl,-ms8300s
  346. CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32
  347. CPU_CFLAGS-$(CONFIG_H8S) += -ms -mint32
  348. endif
  349. ifeq ($(TARGET_ARCH),cris)
  350. CPU_LDFLAGS-$(CONFIG_CRIS)+=-Wl,-mcrislinux
  351. CPU_LDFLAGS-$(CONFIG_CRISV32)+=-Wl,-mcrislinux
  352. CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
  353. PICFLAG:=-fpic
  354. PIEFLAG_NAME:=-fpie
  355. endif
  356. ifeq ($(TARGET_ARCH),m68k)
  357. # -fPIC is only supported for 68020 and above. It is not supported
  358. # for 68000, 68010, or Coldfire.
  359. PICFLAG:=-fpic
  360. PIEFLAG_NAME:=-fpie
  361. endif
  362. ifeq ($(TARGET_ARCH),powerpc)
  363. # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
  364. # enough. Therefore use -fpic which will reduce code size and generates
  365. # faster code.
  366. PICFLAG:=-fpic
  367. PIEFLAG_NAME:=-fpie
  368. PPC_HAS_REL16:=$(shell echo -e "\t.text\n\taddis 11,30,_GLOBAL_OFFSET_TABLE_-.@ha" | $(CC) -c -x assembler -o /dev/null - 2> /dev/null && echo -n y || echo -n n)
  369. CPU_CFLAGS-$(PPC_HAS_REL16)+= -DHAVE_ASM_PPC_REL16
  370. CPU_CFLAGS-$(CONFIG_E500) += "-D__NO_MATH_INLINES"
  371. endif
  372. ifeq ($(TARGET_ARCH),bfin)
  373. SYMBOL_PREFIX=_
  374. ifeq ($(UCLIBC_FORMAT_FDPIC_ELF),y)
  375. CPU_CFLAGS-y:=-mfdpic
  376. CPU_LDFLAGS-y += -Wl,-melf32bfinfd
  377. PICFLAG:=-fpic
  378. PIEFLAG_NAME:=-fpie
  379. endif
  380. ifeq ($(UCLIBC_FORMAT_SHARED_FLAT),y)
  381. PICFLAG := -mleaf-id-shared-library
  382. endif
  383. endif
  384. ifeq ($(TARGET_ARCH),frv)
  385. CPU_LDFLAGS-$(CONFIG_FRV)+=-Wl,-melf32frvfd
  386. # Using -pie causes the program to have an interpreter, which is
  387. # forbidden, so we must make do with -shared. Unfortunately,
  388. # -shared by itself would get us global function descriptors
  389. # and calls through PLTs, dynamic resolution of symbols, etc,
  390. # which would break as well, but -Bsymbolic comes to the rescue.
  391. export LDPIEFLAG:=-shared -Wl,-Bsymbolic
  392. UCLIBC_LDSO=ld.so.1
  393. endif
  394. ifeq ($(strip $(TARGET_ARCH)),avr32)
  395. CPU_CFLAGS-$(CONFIG_AVR32_AP7) += -march=ap
  396. CPU_CFLAGS-$(CONFIG_LINKRELAX) += -mrelax
  397. CPU_LDFLAGS-$(CONFIG_LINKRELAX) += --relax
  398. endif
  399. ifeq ($(TARGET_ARCH),i960)
  400. SYMBOL_PREFIX=_
  401. endif
  402. ifeq ($(TARGET_ARCH),microblaze)
  403. SYMBOL_PREFIX=_
  404. endif
  405. ifeq ($(TARGET_ARCH),v850)
  406. SYMBOL_PREFIX=_
  407. endif
  408. # Keep the check_gcc from being needlessly executed
  409. ifndef PIEFLAG
  410. export PIEFLAG:=$(call check_gcc,$(PIEFLAG_NAME),$(PICFLAG))
  411. endif
  412. # We need to keep track of both the CC PIE flag (above) as
  413. # well as the LD PIE flag (below) because we can't rely on
  414. # gcc passing -pie if we used -fPIE. We need to directly use -pie
  415. # instead of -Wl,-pie as gcc picks up the wrong startfile/endfile
  416. ifndef LDPIEFLAG
  417. export LDPIEFLAG:=$(shell $(LD) --help 2>/dev/null | grep -q -- -pie && echo "-pie")
  418. endif
  419. # Check for --as-needed support in linker
  420. ifndef LD_FLAG_ASNEEDED
  421. _LD_FLAG_ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -- --as-needed)
  422. ifneq ($(_LD_FLAG_ASNEEDED),)
  423. export LD_FLAG_ASNEEDED:=--as-needed
  424. endif
  425. endif
  426. ifndef LD_FLAG_NO_ASNEEDED
  427. ifdef LD_FLAG_ASNEEDED
  428. export LD_FLAG_NO_ASNEEDED:=--no-as-needed
  429. endif
  430. endif
  431. ifndef CC_FLAG_ASNEEDED
  432. ifdef LD_FLAG_ASNEEDED
  433. export CC_FLAG_ASNEEDED:=-Wl,$(LD_FLAG_ASNEEDED)
  434. endif
  435. endif
  436. ifndef CC_FLAG_NO_ASNEEDED
  437. ifdef LD_FLAG_NO_ASNEEDED
  438. export CC_FLAG_NO_ASNEEDED:=-Wl,$(LD_FLAG_NO_ASNEEDED)
  439. endif
  440. endif
  441. link.asneeded = $(if $(and $(CC_FLAG_ASNEEDED),$(CC_FLAG_NO_ASNEEDED)),$(CC_FLAG_ASNEEDED) $(1) $(CC_FLAG_NO_ASNEEDED))
  442. # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
  443. ifndef ASNEEDED
  444. export ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -q -- --as-needed && echo "AS_NEEDED ( $(UCLIBC_LDSO) )" || echo "$(UCLIBC_LDSO)")
  445. endif
  446. # Add a bunch of extra pedantic annoyingly strict checks
  447. XWARNINGS=$(call qstrip,$(WARNINGS)) -Wstrict-prototypes -fno-strict-aliasing
  448. ifeq ($(EXTRA_WARNINGS),y)
  449. XWARNINGS+=-Wnested-externs -Wshadow -Wmissing-noreturn -Wmissing-format-attribute -Wformat=2
  450. XWARNINGS+=-Wmissing-prototypes -Wmissing-declarations
  451. XWARNINGS+=-Wnonnull -Wundef
  452. # Works only w/ gcc-3.4 and up, can't be checked for gcc-3.x w/ check_gcc()
  453. #XWARNINGS+=-Wdeclaration-after-statement
  454. endif
  455. # Seems to be unused (no ARCH_CFLAGS anywhere), delete?
  456. # if yes, remove after 0.9.31
  457. XARCH_CFLAGS=$(call qstrip,$(ARCH_CFLAGS))
  458. CPU_CFLAGS=$(call qstrip,$(CPU_CFLAGS-y))
  459. SSP_DISABLE_FLAGS ?= $(call check_gcc,-fno-stack-protector,)
  460. ifeq ($(UCLIBC_BUILD_SSP),y)
  461. SSP_CFLAGS := $(call check_gcc,-fno-stack-protector-all,)
  462. SSP_CFLAGS += $(call check_gcc,-fstack-protector,)
  463. SSP_ALL_CFLAGS ?= $(call check_gcc,-fstack-protector-all,)
  464. else
  465. SSP_CFLAGS := $(SSP_DISABLE_FLAGS)
  466. endif
  467. NOSTDLIB_CFLAGS:=$(call check_gcc,-nostdlib,)
  468. # Collect all CFLAGS components
  469. CFLAGS := -include $(top_srcdir)include/libc-symbols.h \
  470. $(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
  471. -nostdinc -I$(top_builddir)include -I$(top_srcdir)include -I. \
  472. -I$(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH)
  473. ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS)),"")
  474. CFLAGS += $(call qstrip,$(UCLIBC_EXTRA_CFLAGS))
  475. endif
  476. # We need this to be checked within libc-symbols.h
  477. ifneq ($(HAVE_SHARED),y)
  478. CFLAGS += -DSTATIC
  479. endif
  480. LDFLAG_WARN_ONCE:=$(if $(call check_ld,--warn-once),-Wl$(comma)--warn-once)
  481. LDFLAG_SORT_COMMON:=$(if $(call check_ld,--sort-common),-Wl$(comma)--sort-common)
  482. LDFLAG_DISCARD_ALL:=$(if $(call check_ld,--discard-all),-Wl$(comma)--discard-all)
  483. LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -shared \
  484. -Wl,--warn-common $(LDFLAG_WARN_ONCE) -Wl,-z,combreloc
  485. # binutils-2.16.1 warns about ignored sections, 2.16.91.0.3 and newer are ok
  486. #LDFLAGS_NOSTRIP+=$(call check_ld,--gc-sections)
  487. ifeq ($(UCLIBC_BUILD_RELRO),y)
  488. LDFLAGS_NOSTRIP+=-Wl,-z,relro
  489. endif
  490. ifeq ($(UCLIBC_BUILD_NOW),y)
  491. LDFLAGS_NOSTRIP+=-Wl,-z,now
  492. endif
  493. ifeq ($(LDSO_GNU_HASH_SUPPORT),y)
  494. # Be sure that binutils support it
  495. LDFLAGS_GNUHASH:=$(call check_ld,--hash-style=gnu)
  496. ifeq ($(LDFLAGS_GNUHASH),)
  497. ifneq ($(filter-out install_headers headers-y,$(MAKECMDGOALS)),)
  498. $(error Your binutils do not support --hash-style option, while you want to use it)
  499. endif
  500. else
  501. LDFLAGS_NOSTRIP += -Wl,$(LDFLAGS_GNUHASH)
  502. endif
  503. endif
  504. LDFLAGS:=$(LDFLAGS_NOSTRIP) -Wl,-z,defs
  505. ifeq ($(DODEBUG),y)
  506. CFLAGS += -O0 -g3
  507. else
  508. CFLAGS += $(OPTIMIZATION) $(XARCH_CFLAGS)
  509. endif
  510. ifeq ($(DOSTRIP),y)
  511. LDFLAGS += -Wl,-s
  512. else
  513. STRIPTOOL := true -Stripping_disabled
  514. endif
  515. ifeq ($(DOMULTI),y)
  516. # we try to compile all sources at once into an object (IMA), but
  517. # gcc-3.3.x does not support it
  518. # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources
  519. # gcc-4.0.x supports it, supports the --combine flag, but does not need it
  520. # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless
  521. ifeq ($(GCC_MAJOR_VER),3)
  522. DOMULTI:=n
  523. else
  524. CFLAGS+=$(call check_gcc,--combine,)
  525. endif
  526. else
  527. DOMULTI:=n
  528. endif
  529. ifneq ($(strip $(UCLIBC_EXTRA_LDFLAGS)),"")
  530. LDFLAGS += $(call qstrip,$(UCLIBC_EXTRA_LDFLAGS))
  531. endif
  532. ifeq ($(UCLIBC_HAS_THREADS),y)
  533. ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
  534. PTNAME := nptl
  535. else
  536. ifeq ($(LINUXTHREADS_OLD),y)
  537. PTNAME := linuxthreads.old
  538. else
  539. PTNAME := linuxthreads
  540. endif
  541. endif
  542. PTDIR := libpthread/$(PTNAME)
  543. # set up system dependencies include dirs (NOTE: order matters!)
  544. ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
  545. PTINC:= -I$(top_srcdir)$(PTDIR) \
  546. -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
  547. -I$(top_srcdir)$(PTDIR)/sysdeps/$(TARGET_ARCH) \
  548. -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux \
  549. -I$(top_srcdir)$(PTDIR)/sysdeps/pthread \
  550. -I$(top_srcdir)$(PTDIR)/sysdeps/pthread/bits \
  551. -I$(top_srcdir)$(PTDIR)/sysdeps/generic \
  552. -I$(top_srcdir)ldso/ldso/$(TARGET_ARCH) \
  553. -I$(top_srcdir)ldso/include
  554. #
  555. # Test for TLS if NPTL support was selected.
  556. #
  557. GCC_HAS_TLS=$(shell \
  558. echo "extern __thread int foo;" | $(CC) -o /dev/null -S -xc - 2>&1)
  559. ifneq ($(GCC_HAS_TLS),)
  560. gcc_tls_test_fail:
  561. @echo "####";
  562. @echo "#### Your compiler does not support TLS and you are trying to build uClibc";
  563. @echo "#### with NPTL support. Upgrade your binutils and gcc to versions which";
  564. @echo "#### support TLS for your architecture. Do not contact uClibc maintainers";
  565. @echo "#### about this problem.";
  566. @echo "####";
  567. @echo "#### Exiting...";
  568. @echo "####";
  569. @exit 1;
  570. endif
  571. else
  572. PTINC := \
  573. -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
  574. -I$(top_srcdir)$(PTDIR)/sysdeps/$(TARGET_ARCH) \
  575. -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux \
  576. -I$(top_srcdir)$(PTDIR)/sysdeps/pthread \
  577. -I$(top_srcdir)$(PTDIR) \
  578. -I$(top_srcdir)libpthread
  579. endif
  580. CFLAGS+=$(PTINC)
  581. else
  582. PTNAME :=
  583. PTINC :=
  584. endif
  585. CFLAGS += -I$(KERNEL_HEADERS)
  586. #CFLAGS += -iwithprefix include-fixed -iwithprefix include
  587. CC_IPREFIX := $(shell $(CC) --print-file-name=include)
  588. CC_INC := -isystem $(dir $(CC_IPREFIX))include-fixed -isystem $(CC_IPREFIX)
  589. CFLAGS += $(CC_INC)
  590. ifneq ($(DOASSERTS),y)
  591. CFLAGS+=-DNDEBUG
  592. endif
  593. ifeq ($(SYMBOL_PREFIX),_)
  594. CFLAGS+=-D__UCLIBC_UNDERSCORES__
  595. endif
  596. # Keep the check_as from being needlessly executed
  597. ifndef ASFLAGS_NOEXEC
  598. ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
  599. export ASFLAGS_NOEXEC := $(call check_as,--noexecstack)
  600. else
  601. export ASFLAGS_NOEXEC :=
  602. endif
  603. endif
  604. ASFLAGS = $(ASFLAGS_NOEXEC)
  605. LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
  606. LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
  607. LIBGCC_DIR:=$(dir $(LIBGCC))
  608. # moved from libpthread/linuxthreads
  609. ifeq ($(UCLIBC_CTOR_DTOR),y)
  610. SHARED_START_FILES:=$(top_builddir)lib/crti.o $(LIBGCC_DIR)crtbeginS.o
  611. SHARED_END_FILES:=$(LIBGCC_DIR)crtendS.o $(top_builddir)lib/crtn.o
  612. endif
  613. LOCAL_INSTALL_PATH := install_dir