Rules.mak 25 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. OBJDUMP = $(CROSS)objdump
  43. STRIPTOOL = $(CROSS)strip
  44. INSTALL = install
  45. LN = ln
  46. RM = rm -f
  47. TAR = tar
  48. SED = sed
  49. AWK = awk
  50. STRIP_FLAGS ?= -x -R .note -R .comment
  51. ## unused? if yes, remove after 0.9.31
  52. ## UNIFDEF := $(top_builddir)extra/scripts/unifdef
  53. # Select the compiler needed to build binaries for your development system
  54. HOSTCC = gcc
  55. BUILD_CFLAGS = -Os -Wall
  56. #---------------------------------------------------------
  57. # Nothing beyond this point should ever be touched by mere
  58. # mortals. Unless you hang out with the gods, you should
  59. # probably leave all this stuff alone.
  60. # strip quotes
  61. qstrip = $(strip $(subst ",,$(1)))
  62. #"))
  63. # Pull in the user's uClibc configuration
  64. ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
  65. -include $(top_builddir).config
  66. endif
  67. TARGET_ARCH:=$(call qstrip,$(TARGET_ARCH))
  68. ifeq ($(TARGET_ARCH),)
  69. ARCH ?= $(shell uname -m | $(SED) -e s/i.86/i386/ \
  70. -e s/sun.*/sparc/ -e s/sparc.*/sparc/ \
  71. -e s/arm.*/arm/ -e s/sa110/arm/ \
  72. -e s/sh.*/sh/ \
  73. -e s/s390x/s390/ -e s/parisc.*/hppa/ \
  74. -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
  75. -e s/xtensa.*/xtensa/ )
  76. else
  77. ARCH = $(TARGET_ARCH)
  78. endif
  79. export ARCH
  80. # Make certain these contain a final "/", but no "//"s.
  81. TARGET_SUBARCH:=$(call qstrip,$(shell grep -s '^TARGET_SUBARCH' $(top_builddir)/.config | $(SED) -e 's/^TARGET_SUBARCH=//'))
  82. TARGET_SUBARCH:=$(call qstrip,$(TARGET_SUBARCH))
  83. RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(call qstrip,$(RUNTIME_PREFIX)))))
  84. DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(call qstrip,$(DEVEL_PREFIX)))))
  85. MULTILIB_DIR:=$(strip $(subst //,/, $(subst ,/, $(call qstrip,$(MULTILIB_DIR)))))
  86. KERNEL_HEADERS:=$(strip $(subst //,/, $(subst ,/, $(call qstrip,$(KERNEL_HEADERS)))))
  87. export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_HEADERS MULTILIB_DIR
  88. # Now config hard core
  89. MAJOR_VERSION := 0
  90. MINOR_VERSION := 9
  91. SUBLEVEL := 32
  92. EXTRAVERSION :=-rc3-git
  93. VERSION := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
  94. ABI_VERSION := $(MAJOR_VERSION)
  95. ifneq ($(EXTRAVERSION),)
  96. VERSION := $(VERSION)$(EXTRAVERSION)
  97. endif
  98. # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
  99. LC_ALL := C
  100. export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION ABI_VERSION LC_ALL
  101. LIBC := libc
  102. SHARED_LIBNAME := $(LIBC).so.$(ABI_VERSION)
  103. UBACKTRACE_DSO := libubacktrace.so.$(MAJOR_VERSION)
  104. ifneq ($(findstring $(TARGET_ARCH) , hppa64 ia64 mips64 powerpc64 s390x sparc64 x86_64 ),)
  105. UCLIBC_LDSO_NAME := ld64-uClibc
  106. ARCH_NATIVE_BIT := 64
  107. else
  108. UCLIBC_LDSO_NAME := ld-uClibc
  109. ARCH_NATIVE_BIT := 32
  110. endif
  111. UCLIBC_LDSO := $(UCLIBC_LDSO_NAME).so.$(ABI_VERSION)
  112. NONSHARED_LIBNAME := uclibc_nonshared.a
  113. libc := $(top_builddir)lib/$(SHARED_LIBNAME)
  114. libc.depend := $(top_builddir)lib/$(SHARED_LIBNAME:.$(ABI_VERSION)=)
  115. ifneq ($(ARCH_HAS_NO_SHARED),y)
  116. libdl.depend := $(top_builddir)lib/libdl.so
  117. endif
  118. ifneq ($(HAS_NO_THREADS),y)
  119. libpthread.depend := $(top_builddir)lib/libpthread.so
  120. endif
  121. interp := $(top_builddir)lib/interp.os
  122. ldso := $(top_builddir)lib/$(UCLIBC_LDSO)
  123. headers_dep := $(top_builddir)include/bits/sysnum.h
  124. sub_headers := $(headers_dep)
  125. #LIBS :=$(interp) -L$(top_builddir)lib -lc
  126. LIBS := $(interp) -L$(top_builddir)lib $(libc:.$(ABI_VERSION)=)
  127. # Make sure DESTDIR and PREFIX can be used to install
  128. # PREFIX is a uClibcism while DESTDIR is a common GNUism
  129. ifndef PREFIX
  130. PREFIX = $(DESTDIR)
  131. endif
  132. ifneq ($(HAVE_SHARED),y)
  133. libc :=
  134. interp :=
  135. ldso :=
  136. endif
  137. comma:=,
  138. space:= #
  139. ifndef CROSS
  140. CROSS=$(call qstrip,$(CROSS_COMPILER_PREFIX))
  141. endif
  142. # A nifty macro to make testing gcc features easier
  143. check_gcc=$(shell \
  144. if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
  145. then echo "$(1)"; else echo "$(2)"; fi)
  146. check_as=$(shell \
  147. if $(CC) -Wa,$(1) -Wa,-Z -c -o /dev/null -xassembler /dev/null > /dev/null 2>&1; \
  148. then echo "-Wa,$(1)"; fi)
  149. check_ld=$(shell \
  150. if $(LD) $(1) -o /dev/null -b binary /dev/null > /dev/null 2>&1; \
  151. then echo "$(1)"; fi)
  152. ARFLAGS:=cr
  153. # Flags in OPTIMIZATION are used only for non-debug builds
  154. OPTIMIZATION:=
  155. # Use '-Os' optimization if available, else use -O2, allow Config to override
  156. OPTIMIZATION+=$(call check_gcc,-Os,-O2)
  157. # Use the gcc 3.4 -funit-at-a-time optimization when available
  158. OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
  159. # shrinks code by about 0.1%
  160. OPTIMIZATION+=$(call check_gcc,-fmerge-all-constants)
  161. OPTIMIZATION+=$(call check_gcc,-fstrict-aliasing)
  162. GCC_MAJOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 1)
  163. #GCC_MINOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 2)
  164. ifeq ($(GCC_MAJOR_VER),4)
  165. # shrinks code, results are from 4.0.2
  166. # 0.36%
  167. OPTIMIZATION+=$(call check_gcc,-fno-tree-loop-optimize,)
  168. # 0.34%
  169. OPTIMIZATION+=$(call check_gcc,-fno-tree-dominator-opts,)
  170. # 0.1%
  171. OPTIMIZATION+=$(call check_gcc,-fno-strength-reduce,)
  172. endif
  173. # CPU_CFLAGS-y contain options which are not warnings,
  174. # not include or library paths, and not optimizations.
  175. # Why -funsigned-char: I hunted a bug related to incorrect
  176. # sign extension of 'char' type for 10 hours straight. Not fun.
  177. CPU_CFLAGS-y := -funsigned-char -fno-builtin
  178. CPU_CFLAGS-y += $(call check_gcc,-fno-asm,)
  179. LDADD_LIBFLOAT=
  180. ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
  181. # If -msoft-float isn't supported, we want an error anyway.
  182. # Hmm... might need to revisit this for arm since it has 2 different
  183. # soft float encodings.
  184. ifneq ($(TARGET_ARCH),nios)
  185. ifneq ($(TARGET_ARCH),nios2)
  186. ifneq ($(TARGET_ARCH),sh)
  187. ifneq ($(TARGET_ARCH),c6x)
  188. CPU_CFLAGS-y += -msoft-float
  189. endif
  190. endif
  191. endif
  192. endif
  193. ifeq ($(TARGET_ARCH),arm)
  194. # No longer needed with current toolchains, but leave it here for now.
  195. # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
  196. # LDADD_LIBFLOAT=-lfloat
  197. endif
  198. endif
  199. CPU_CFLAGS-y += $(call check_gcc,-std=gnu99,)
  200. CPU_CFLAGS-$(UCLIBC_FORMAT_SHARED_FLAT) += -mid-shared-library
  201. CPU_CFLAGS-$(UCLIBC_FORMAT_FLAT_SEP_DATA) += -msep-data
  202. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN) += -Wl,-EL
  203. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN) += -Wl,-EB
  204. PICFLAG-y := -fPIC
  205. PICFLAG-$(UCLIBC_FORMAT_FDPIC_ELF) := -mfdpic
  206. PICFLAG-$(UCLIBC_FORMAT_DSBT_ELF) := -mdsbt -fpic
  207. PICFLAG := $(PICFLAG-y)
  208. PIEFLAG_NAME:=-fPIE
  209. # Some nice CPU specific optimizations
  210. ifeq ($(TARGET_ARCH),i386)
  211. OPTIMIZATION+=$(call check_gcc,-fomit-frame-pointer,)
  212. ifeq ($(CONFIG_386)$(CONFIG_486)$(CONFIG_586)$(CONFIG_586MMX),y)
  213. # Non-SSE capable processor.
  214. # NB: this may make SSE insns segfault!
  215. # -O1 -march=pentium3, -Os -msse etc are known to be affected.
  216. # See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685
  217. # -m32 is needed if host is 64-bit
  218. OPTIMIZATION+=$(call check_gcc,-m32 -mpreferred-stack-boundary=2,)
  219. else
  220. OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=4,)
  221. endif
  222. # Choice of alignment (please document why!)
  223. # -falign-labels: in-line labels
  224. # (reachable by normal code flow, aligning will insert nops
  225. # which will be executed - may even make things slower)
  226. # -falign-jumps: reachable only by a jump
  227. # Generic: no alignment at all (smallest code)
  228. GCC_FALIGN=$(call check_gcc,-falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1,-malign-jumps=1 -malign-loops=1)
  229. ifeq ($(CONFIG_K7),y)
  230. # Align functions to four bytes, use default for jumps and loops (why?)
  231. GCC_FALIGN=$(call check_gcc,-falign-functions=4 -falign-labels=1,-malign-functions=4)
  232. endif
  233. ifeq ($(CONFIG_CRUSOE),y)
  234. # Use compiler's default for functions, jumps and loops (why?)
  235. GCC_FALIGN=$(call check_gcc,-falign-functions=0 -falign-labels=1,-malign-functions=0)
  236. endif
  237. ifeq ($(CONFIG_CYRIXIII),y)
  238. # Use compiler's default for functions, jumps and loops (why?)
  239. GCC_FALIGN=$(call check_gcc,-falign-functions=0 -falign-labels=1,-malign-functions=0)
  240. endif
  241. OPTIMIZATION+=$(GCC_FALIGN)
  242. # Putting each function and data object into its own section
  243. # allows for kbytes of less text if users link against static uclibc
  244. # using ld --gc-sections.
  245. # ld 2.18 can't do that (yet?) for shared libraries, so we itself
  246. # do not use --gc-sections at shared lib link time.
  247. # However, in combination with sections being sorted by alignment
  248. # it does result in much reduced padding:
  249. # text data bss dec hex
  250. # 235319 1472 5992 242783 3b45f old.so
  251. # 234104 1472 5980 241556 3af94 new.so
  252. # Without -ffunction-sections, all functions will get aligned
  253. # to 4 byte boundary by as/ld. This is arguably a bug in as.
  254. # It specifies 4 byte align for .text even if not told to do so:
  255. # Idx Name Size VMA LMA File off Algn
  256. # 0 .text xxxxxxxx 00000000 00000000 xxxxxxxx 2**2 <===!
  257. CPU_CFLAGS-y += $(call check_gcc,-ffunction-sections -fdata-sections,)
  258. ifneq ($(call check_ld,--sort-common),)
  259. CPU_LDFLAGS-y += -Wl,--sort-common
  260. endif
  261. ifneq ($(call check_ld,--sort-section alignment),)
  262. CPU_LDFLAGS-y += -Wl,--sort-section,alignment
  263. endif
  264. CPU_LDFLAGS-y+=-m32
  265. CPU_CFLAGS-y+=-m32
  266. CPU_CFLAGS-$(CONFIG_386)+=-march=i386
  267. CPU_CFLAGS-$(CONFIG_486)+=-march=i486
  268. CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
  269. CPU_CFLAGS-$(CONFIG_586)+=-march=i586
  270. CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
  271. CPU_CFLAGS-$(CONFIG_686)+=-march=i686
  272. CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
  273. CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
  274. CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
  275. CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
  276. CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-march=i686)
  277. CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686
  278. CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
  279. CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
  280. CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486)
  281. CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
  282. endif
  283. ifeq ($(TARGET_ARCH),sparc)
  284. CPU_CFLAGS-$(CONFIG_SPARC_V7)+=-mcpu=v7
  285. CPU_CFLAGS-$(CONFIG_SPARC_V8)+=-mcpu=v8
  286. CPU_CFLAGS-$(CONFIG_SPARC_V9)+=-mcpu=v9
  287. CPU_CFLAGS-$(CONFIG_SPARC_V9B)+=$(call check_gcc,-mcpu=v9b,-mcpu=ultrasparc)
  288. endif
  289. ifeq ($(TARGET_ARCH),arm)
  290. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
  291. CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
  292. CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
  293. CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
  294. CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
  295. CPU_CFLAGS-$(CONFIG_ARM7TDMI)+=-mtune=arm7tdmi -march=armv4t
  296. CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4t
  297. CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4t
  298. CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4t
  299. CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9e -march=armv5te
  300. CPU_CFLAGS-$(CONFIG_ARM10T)+=-mtune=arm10tdmi -march=armv5t
  301. CPU_CFLAGS-$(CONFIG_ARM1136JF_S)+=-mtune=arm1136jf-s -march=armv6
  302. CPU_CFLAGS-$(CONFIG_ARM1176JZ_S)+=-mtune=arm1176jz-s -march=armv6
  303. CPU_CFLAGS-$(CONFIG_ARM1176JZF_S)+=-mtune=arm1176jzf-s -march=armv6
  304. CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
  305. CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
  306. CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
  307. CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv5te -Wa,-mcpu=xscale
  308. CPU_CFLAGS-$(CONFIG_ARM_IWMMXT)+=-march=iwmmxt -Wa,-mcpu=iwmmxt -mabi=iwmmxt
  309. CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M3)+=-mcpu=cortex-m3 -mthumb
  310. CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M1)+=-mcpu=cortex-m1 -mthumb
  311. endif
  312. ifeq ($(TARGET_ARCH),mips)
  313. OPTIMIZATION+=-mno-split-addresses
  314. CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
  315. CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
  316. CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
  317. CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
  318. CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
  319. CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32R2)+=-march=mips32r2 -mtune=mips32r2
  320. CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
  321. ifeq ($(strip $(ARCH_BIG_ENDIAN)),y)
  322. CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64btsmip
  323. CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32btsmip
  324. endif
  325. ifeq ($(strip $(ARCH_LITTLE_ENDIAN)),y)
  326. CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64ltsmip
  327. CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32ltsmip
  328. endif
  329. CPU_CFLAGS-$(CONFIG_MIPS_N64_ABI)+=-mabi=64
  330. CPU_CFLAGS-$(CONFIG_MIPS_O32_ABI)+=-mabi=32
  331. CPU_CFLAGS-$(CONFIG_MIPS_N32_ABI)+=-mabi=n32
  332. endif
  333. ifeq ($(TARGET_ARCH),nios)
  334. OPTIMIZATION+=-funaligned-struct-hack
  335. CPU_LDFLAGS-y+=-Wl,-m32
  336. CPU_CFLAGS-y+=-Wl,-m32
  337. endif
  338. ifeq ($(TARGET_ARCH),sh)
  339. OPTIMIZATION+= $(call check_gcc,-mprefergot,)
  340. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
  341. CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
  342. CPU_CFLAGS-$(CONFIG_SH2)+=-m2
  343. CPU_CFLAGS-$(CONFIG_SH3)+=-m3
  344. ifeq ($(UCLIBC_HAS_FPU),y)
  345. CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
  346. CPU_CFLAGS-$(CONFIG_SH4)+=-m4
  347. else
  348. CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
  349. CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
  350. endif
  351. endif
  352. ifeq ($(TARGET_ARCH),sh64)
  353. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
  354. CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
  355. CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
  356. endif
  357. ifeq ($(TARGET_ARCH),h8300)
  358. SYMBOL_PREFIX=_
  359. CPU_LDFLAGS-$(CONFIG_H8300H)+= -Wl,-ms8300h
  360. CPU_LDFLAGS-$(CONFIG_H8S) += -Wl,-ms8300s
  361. CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32
  362. CPU_CFLAGS-$(CONFIG_H8S) += -ms -mint32
  363. endif
  364. ifeq ($(TARGET_ARCH),i960)
  365. OPTIMIZATION+=-mh -mint32 #-fsigned-char
  366. endif
  367. ifeq ($(TARGET_ARCH),e1)
  368. OPTIMIZATION+=-mgnu-param
  369. endif
  370. ifeq ($(TARGET_ARCH),cris)
  371. CPU_LDFLAGS-$(CONFIG_CRIS)+=-Wl,-mcrislinux
  372. CPU_LDFLAGS-$(CONFIG_CRISV32)+=-Wl,-mcrislinux
  373. CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
  374. PICFLAG:=-fpic
  375. PIEFLAG_NAME:=-fpie
  376. endif
  377. ifeq ($(TARGET_ARCH),m68k)
  378. # -fPIC is only supported for 68020 and above. It is not supported
  379. # for 68000, 68010, or Coldfire.
  380. PICFLAG:=-fpic
  381. PIEFLAG_NAME:=-fpie
  382. endif
  383. ifeq ($(TARGET_ARCH),powerpc)
  384. # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
  385. # enough. Therefore use -fpic which will reduce code size and generates
  386. # faster code.
  387. PICFLAG:=-fpic
  388. PIEFLAG_NAME:=-fpie
  389. PPC_HAS_REL16:=$(shell echo -e "\t.text\n\taddis 11,30,_GLOBAL_OFFSET_TABLE_-.@ha" | $(CC) -c -x assembler -o /dev/null - 2> /dev/null && echo -n y || echo -n n)
  390. CPU_CFLAGS-$(PPC_HAS_REL16)+= -DHAVE_ASM_PPC_REL16
  391. CPU_CFLAGS-$(CONFIG_E500) += "-D__NO_MATH_INLINES"
  392. endif
  393. ifeq ($(TARGET_ARCH),bfin)
  394. SYMBOL_PREFIX=_
  395. ifeq ($(UCLIBC_FORMAT_FDPIC_ELF),y)
  396. CPU_CFLAGS-y:=-mfdpic
  397. CPU_LDFLAGS-y += -Wl,-melf32bfinfd
  398. PICFLAG:=-fpic
  399. PIEFLAG_NAME:=-fpie
  400. endif
  401. ifeq ($(UCLIBC_FORMAT_SHARED_FLAT),y)
  402. PICFLAG := -mleaf-id-shared-library
  403. endif
  404. endif
  405. ifeq ($(TARGET_ARCH),frv)
  406. CPU_LDFLAGS-$(CONFIG_FRV)+=-Wl,-melf32frvfd
  407. # Using -pie causes the program to have an interpreter, which is
  408. # forbidden, so we must make do with -shared. Unfortunately,
  409. # -shared by itself would get us global function descriptors
  410. # and calls through PLTs, dynamic resolution of symbols, etc,
  411. # which would break as well, but -Bsymbolic comes to the rescue.
  412. export LDPIEFLAG:=-shared -Wl,-Bsymbolic
  413. UCLIBC_LDSO=ld.so.1
  414. endif
  415. ifeq ($(strip $(TARGET_ARCH)),avr32)
  416. CPU_CFLAGS-$(CONFIG_AVR32_AP7) += -march=ap
  417. CPU_CFLAGS-$(CONFIG_LINKRELAX) += -mrelax
  418. CPU_LDFLAGS-$(CONFIG_LINKRELAX) += --relax
  419. endif
  420. ifeq ($(TARGET_ARCH),i960)
  421. SYMBOL_PREFIX=_
  422. endif
  423. ifeq ($(TARGET_ARCH),v850)
  424. SYMBOL_PREFIX=_
  425. endif
  426. ifeq ($(TARGET_ARCH),c6x)
  427. PIEFLAG:=
  428. CPU_CFLAGS-$(CONFIG_TMS320C64X) += -march=c64x
  429. CPU_CFLAGS-$(CONFIG_TMS320C64XPLUS) += -march=c64x+
  430. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
  431. CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
  432. CPU_LDFLAGS-y += $(CPU_CFLAGS)
  433. endif
  434. # Keep the check_gcc from being needlessly executed
  435. ifndef PIEFLAG
  436. export PIEFLAG:=$(call check_gcc,$(PIEFLAG_NAME),$(PICFLAG))
  437. endif
  438. # We need to keep track of both the CC PIE flag (above) as
  439. # well as the LD PIE flag (below) because we can't rely on
  440. # gcc passing -pie if we used -fPIE. We need to directly use -pie
  441. # instead of -Wl,-pie as gcc picks up the wrong startfile/endfile
  442. ifndef LDPIEFLAG
  443. export LDPIEFLAG:=$(shell $(LD) --help 2>/dev/null | grep -q -- -pie && echo "-pie")
  444. endif
  445. # Check for --as-needed support in linker
  446. ifndef LD_FLAG_ASNEEDED
  447. _LD_FLAG_ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -- --as-needed)
  448. ifneq ($(_LD_FLAG_ASNEEDED),)
  449. export LD_FLAG_ASNEEDED:=--as-needed
  450. endif
  451. endif
  452. ifndef LD_FLAG_NO_ASNEEDED
  453. ifdef LD_FLAG_ASNEEDED
  454. export LD_FLAG_NO_ASNEEDED:=--no-as-needed
  455. endif
  456. endif
  457. ifndef CC_FLAG_ASNEEDED
  458. ifdef LD_FLAG_ASNEEDED
  459. export CC_FLAG_ASNEEDED:=-Wl,$(LD_FLAG_ASNEEDED)
  460. endif
  461. endif
  462. ifndef CC_FLAG_NO_ASNEEDED
  463. ifdef LD_FLAG_NO_ASNEEDED
  464. export CC_FLAG_NO_ASNEEDED:=-Wl,$(LD_FLAG_NO_ASNEEDED)
  465. endif
  466. endif
  467. link.asneeded = $(if $(findstring yy,$(CC_FLAG_ASNEEDED)$(CC_FLAG_NO_ASNEEDED)),$(CC_FLAG_ASNEEDED) $(1) $(CC_FLAG_NO_ASNEEDED))
  468. # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
  469. ifndef ASNEEDED
  470. export ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -q -- --as-needed && echo "AS_NEEDED ( $(UCLIBC_LDSO) )" || echo "$(UCLIBC_LDSO)")
  471. ifeq ($(UCLIBC_HAS_BACKTRACE),y)
  472. # Only used in installed libc.so linker script
  473. UBACKTRACE_FULL_NAME := $(RUNTIME_PREFIX)lib/$(UBACKTRACE_DSO)
  474. export UBACKTRACE_ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -q -- --as-needed && echo "AS_NEEDED ( $(UBACKTRACE_FULL_NAME) )" || echo "$(UBACKTRACE_FULL_NAME)")
  475. else
  476. export UBACKTRACE_ASNEEDED:=""
  477. endif
  478. endif
  479. # Add a bunch of extra pedantic annoyingly strict checks
  480. XWARNINGS=$(call qstrip,$(WARNINGS))
  481. XWARNINGS+=$(foreach w,\
  482. -Wstrict-prototypes \
  483. -Wstrict-aliasing \
  484. , $(call check_gcc,$(w),))
  485. ifeq ($(EXTRA_WARNINGS),y)
  486. XWARNINGS+=$(foreach w,\
  487. -Wformat=2 \
  488. -Wmissing-noreturn \
  489. -Wmissing-format-attribute \
  490. -Wmissing-prototypes \
  491. -Wmissing-declarations \
  492. -Wnested-externs \
  493. -Wnonnull \
  494. -Wold-style-declaration \
  495. -Wold-style-definition \
  496. -Wshadow \
  497. -Wundef \
  498. , $(call check_gcc,$(w),))
  499. # Works only w/ gcc-3.4 and up, can't be checked for gcc-3.x w/ check_gcc()
  500. #XWARNINGS+=-Wdeclaration-after-statement
  501. endif
  502. CPU_CFLAGS=$(call qstrip,$(CPU_CFLAGS-y))
  503. SSP_DISABLE_FLAGS ?= $(call check_gcc,-fno-stack-protector,)
  504. ifeq ($(UCLIBC_BUILD_SSP),y)
  505. SSP_CFLAGS := $(call check_gcc,-fno-stack-protector-all,)
  506. SSP_CFLAGS += $(call check_gcc,-fstack-protector,)
  507. SSP_ALL_CFLAGS ?= $(call check_gcc,-fstack-protector-all,)
  508. else
  509. SSP_CFLAGS := $(SSP_DISABLE_FLAGS)
  510. endif
  511. NOSTDLIB_CFLAGS:=$(call check_gcc,-nostdlib,)
  512. # Collect all CFLAGS components
  513. CFLAGS := -include $(top_srcdir)include/libc-symbols.h \
  514. $(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
  515. -nostdinc -I$(top_builddir)include -I$(top_srcdir)include -I. \
  516. -I$(top_srcdir)libc/sysdeps/linux \
  517. -I$(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH)
  518. ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS)),"")
  519. CFLAGS += $(call qstrip,$(UCLIBC_EXTRA_CFLAGS))
  520. endif
  521. # We need this to be checked within libc-symbols.h
  522. ifneq ($(HAVE_SHARED),y)
  523. CFLAGS += -DSTATIC
  524. endif
  525. LDFLAG_WARN_ONCE:=$(if $(call check_ld,--warn-once),-Wl$(comma)--warn-once)
  526. LDFLAG_SORT_COMMON:=$(if $(call check_ld,--sort-common),-Wl$(comma)--sort-common)
  527. LDFLAG_DISCARD_ALL:=$(if $(call check_ld,--discard-all),-Wl$(comma)--discard-all)
  528. LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -shared \
  529. -Wl,--warn-common $(LDFLAG_WARN_ONCE) -Wl,-z,combreloc
  530. # binutils-2.16.1 warns about ignored sections, 2.16.91.0.3 and newer are ok
  531. #LDFLAGS_NOSTRIP+=$(call check_ld,--gc-sections)
  532. ifeq ($(UCLIBC_BUILD_RELRO),y)
  533. LDFLAGS_NOSTRIP+=-Wl,-z,relro
  534. endif
  535. ifeq ($(UCLIBC_BUILD_NOW),y)
  536. LDFLAGS_NOSTRIP+=-Wl,-z,now
  537. endif
  538. ifeq ($(LDSO_GNU_HASH_SUPPORT),y)
  539. # Be sure that binutils support it
  540. LDFLAGS_GNUHASH:=$(call check_ld,--hash-style=gnu)
  541. ifeq ($(LDFLAGS_GNUHASH),)
  542. ifneq ($(filter-out $(clean_targets) install_headers headers-y,$(MAKECMDGOALS)),)
  543. $(error Your binutils do not support --hash-style option, while you want to use it)
  544. endif
  545. else
  546. LDFLAGS_NOSTRIP += -Wl,$(LDFLAGS_GNUHASH)
  547. endif
  548. endif
  549. LDFLAGS:=$(LDFLAGS_NOSTRIP) -Wl,-z,defs
  550. ifeq ($(DODEBUG),y)
  551. CFLAGS += -O0 -g3 -DDEBUG
  552. else
  553. CFLAGS += $(OPTIMIZATION)
  554. endif
  555. ifeq ($(DOSTRIP),y)
  556. LDFLAGS += -Wl,-s
  557. else
  558. STRIPTOOL := true -Stripping_disabled
  559. endif
  560. ifeq ($(DOMULTI),y)
  561. # we try to compile all sources at once into an object (IMA), but
  562. # gcc-3.3.x does not support it
  563. # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources
  564. # gcc-4.0.x supports it, supports the --combine flag, but does not need it
  565. # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless
  566. ifeq ($(GCC_MAJOR_VER),3)
  567. DOMULTI:=n
  568. else
  569. CFLAGS+=$(call check_gcc,--combine,)
  570. endif
  571. else
  572. DOMULTI:=n
  573. endif
  574. ifneq ($(strip $(UCLIBC_EXTRA_LDFLAGS)),"")
  575. LDFLAGS += $(call qstrip,$(UCLIBC_EXTRA_LDFLAGS))
  576. endif
  577. ifeq ($(UCLIBC_HAS_THREADS),y)
  578. ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
  579. PTNAME := nptl
  580. CFLAGS += -DHAVE_FORCED_UNWIND
  581. else
  582. ifeq ($(LINUXTHREADS_OLD),y)
  583. PTNAME := linuxthreads.old
  584. else
  585. PTNAME := linuxthreads
  586. endif
  587. endif
  588. PTDIR := libpthread/$(PTNAME)
  589. # set up system dependencies include dirs (NOTE: order matters!)
  590. ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
  591. PTINC:= -I$(top_builddir)$(PTDIR) \
  592. -I$(top_srcdir)$(PTDIR) \
  593. $(if $(TARGET_ARCH),-I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH)/$(TARGET_SUBARCH)) \
  594. -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
  595. -I$(top_builddir)$(PTDIR)/sysdeps/$(TARGET_ARCH) \
  596. -I$(top_srcdir)$(PTDIR)/sysdeps/$(TARGET_ARCH) \
  597. -I$(top_builddir)$(PTDIR)/sysdeps/unix/sysv/linux \
  598. -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux \
  599. -I$(top_srcdir)$(PTDIR)/sysdeps/pthread \
  600. -I$(top_srcdir)$(PTDIR)/sysdeps/pthread/bits \
  601. -I$(top_srcdir)$(PTDIR)/sysdeps/generic \
  602. -I$(top_srcdir)ldso/ldso/$(TARGET_ARCH) \
  603. -I$(top_srcdir)ldso/include
  604. #
  605. # Test for TLS if NPTL support was selected.
  606. #
  607. GCC_HAS_TLS=$(shell \
  608. echo "extern __thread int foo;" | $(CC) -o /dev/null -S -xc - 2>&1)
  609. ifneq ($(GCC_HAS_TLS),)
  610. gcc_tls_test_fail:
  611. @echo "####";
  612. @echo "#### Your compiler does not support TLS and you are trying to build uClibc";
  613. @echo "#### with NPTL support. Upgrade your binutils and gcc to versions which";
  614. @echo "#### support TLS for your architecture. Do not contact uClibc maintainers";
  615. @echo "#### about this problem.";
  616. @echo "####";
  617. @echo "#### Exiting...";
  618. @echo "####";
  619. @exit 1;
  620. endif
  621. else
  622. PTINC := \
  623. -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
  624. -I$(top_srcdir)$(PTDIR)/sysdeps/$(TARGET_ARCH) \
  625. -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux \
  626. -I$(top_srcdir)$(PTDIR)/sysdeps/pthread \
  627. -I$(top_srcdir)$(PTDIR) \
  628. -I$(top_srcdir)libpthread
  629. endif
  630. CFLAGS+=$(PTINC)
  631. else
  632. PTNAME :=
  633. PTINC :=
  634. endif
  635. CFLAGS += -I$(top_srcdir)libc/sysdeps/linux/common
  636. CFLAGS += -I$(KERNEL_HEADERS)
  637. #CFLAGS += -iwithprefix include-fixed -iwithprefix include
  638. CC_IPREFIX := $(shell $(CC) --print-file-name=include)
  639. CC_INC := -isystem $(dir $(CC_IPREFIX))include-fixed -isystem $(CC_IPREFIX)
  640. CFLAGS += $(CC_INC)
  641. ifneq ($(DOASSERTS),y)
  642. CFLAGS+=-DNDEBUG
  643. endif
  644. ifeq ($(SYMBOL_PREFIX),_)
  645. CFLAGS+=-D__UCLIBC_UNDERSCORES__
  646. endif
  647. # Keep the check_as from being needlessly executed
  648. ifndef ASFLAGS_NOEXEC
  649. ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
  650. export ASFLAGS_NOEXEC := $(call check_as,--noexecstack)
  651. else
  652. export ASFLAGS_NOEXEC :=
  653. endif
  654. endif
  655. ASFLAGS = $(ASFLAGS_NOEXEC)
  656. LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
  657. LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
  658. LIBGCC_DIR:=$(dir $(LIBGCC))
  659. # moved from libpthread/linuxthreads
  660. ifeq ($(UCLIBC_CTOR_DTOR),y)
  661. SHARED_START_FILES:=$(top_builddir)lib/crti.o $(LIBGCC_DIR)crtbeginS.o
  662. SHARED_END_FILES:=$(LIBGCC_DIR)crtendS.o $(top_builddir)lib/crtn.o
  663. endif
  664. LOCAL_INSTALL_PATH := install_dir