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+=$(call check_gcc,-fmerge-all-constants)
  161. GCC_MAJOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 1)
  162. #GCC_MINOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 2)
  163. ifeq ($(GCC_MAJOR_VER),4)
  164. # shrinks code, results are from 4.0.2
  165. # 0.36%
  166. OPTIMIZATION+=$(call check_gcc,-fno-tree-loop-optimize,)
  167. # 0.34%
  168. OPTIMIZATION+=$(call check_gcc,-fno-tree-dominator-opts,)
  169. # 0.1%
  170. OPTIMIZATION+=$(call check_gcc,-fno-strength-reduce,)
  171. endif
  172. # CPU_CFLAGS-y contain options which are not warnings,
  173. # not include or library paths, and not optimizations.
  174. # Why -funsigned-char: I hunted a bug related to incorrect
  175. # sign extension of 'char' type for 10 hours straight. Not fun.
  176. CPU_CFLAGS-y := -funsigned-char -fno-builtin
  177. CPU_CFLAGS-y += $(call check_gcc,-fno-asm,)
  178. LDADD_LIBFLOAT=
  179. ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
  180. # If -msoft-float isn't supported, we want an error anyway.
  181. # Hmm... might need to revisit this for arm since it has 2 different
  182. # soft float encodings.
  183. ifneq ($(TARGET_ARCH),nios)
  184. ifneq ($(TARGET_ARCH),nios2)
  185. ifneq ($(TARGET_ARCH),sh)
  186. ifneq ($(TARGET_ARCH),c6x)
  187. CPU_CFLAGS-y += -msoft-float
  188. endif
  189. endif
  190. endif
  191. endif
  192. ifeq ($(TARGET_ARCH),arm)
  193. # No longer needed with current toolchains, but leave it here for now.
  194. # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
  195. # LDADD_LIBFLOAT=-lfloat
  196. endif
  197. endif
  198. CPU_CFLAGS-y += $(call check_gcc,-std=gnu99,)
  199. CPU_CFLAGS-$(UCLIBC_FORMAT_SHARED_FLAT) += -mid-shared-library
  200. CPU_CFLAGS-$(UCLIBC_FORMAT_FLAT_SEP_DATA) += -msep-data
  201. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN) += -Wl,-EL
  202. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN) += -Wl,-EB
  203. PICFLAG-y := -fPIC
  204. PICFLAG-$(UCLIBC_FORMAT_FDPIC_ELF) := -mfdpic
  205. PICFLAG-$(UCLIBC_FORMAT_DSBT_ELF) := -mdsbt -fpic
  206. PICFLAG := $(PICFLAG-y)
  207. PIEFLAG_NAME:=-fPIE
  208. # Some nice CPU specific optimizations
  209. ifeq ($(TARGET_ARCH),i386)
  210. OPTIMIZATION+=$(call check_gcc,-fomit-frame-pointer,)
  211. ifeq ($(CONFIG_386)$(CONFIG_486)$(CONFIG_586)$(CONFIG_586MMX),y)
  212. # Non-SSE capable processor.
  213. # NB: this may make SSE insns segfault!
  214. # -O1 -march=pentium3, -Os -msse etc are known to be affected.
  215. # See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685
  216. # -m32 is needed if host is 64-bit
  217. OPTIMIZATION+=$(call check_gcc,-m32 -mpreferred-stack-boundary=2,)
  218. else
  219. OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=4,)
  220. endif
  221. # Choice of alignment (please document why!)
  222. # -falign-labels: in-line labels
  223. # (reachable by normal code flow, aligning will insert nops
  224. # which will be executed - may even make things slower)
  225. # -falign-jumps: reachable only by a jump
  226. # Generic: no alignment at all (smallest code)
  227. GCC_FALIGN=$(call check_gcc,-falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1,-malign-jumps=1 -malign-loops=1)
  228. ifeq ($(CONFIG_K7),y)
  229. # Align functions to four bytes, use default for jumps and loops (why?)
  230. GCC_FALIGN=$(call check_gcc,-falign-functions=4 -falign-labels=1,-malign-functions=4)
  231. endif
  232. ifeq ($(CONFIG_CRUSOE),y)
  233. # Use compiler's default for functions, jumps and loops (why?)
  234. GCC_FALIGN=$(call check_gcc,-falign-functions=0 -falign-labels=1,-malign-functions=0)
  235. endif
  236. ifeq ($(CONFIG_CYRIXIII),y)
  237. # Use compiler's default for functions, jumps and loops (why?)
  238. GCC_FALIGN=$(call check_gcc,-falign-functions=0 -falign-labels=1,-malign-functions=0)
  239. endif
  240. OPTIMIZATION+=$(GCC_FALIGN)
  241. # Putting each function and data object into its own section
  242. # allows for kbytes of less text if users link against static uclibc
  243. # using ld --gc-sections.
  244. # ld 2.18 can't do that (yet?) for shared libraries, so we itself
  245. # do not use --gc-sections at shared lib link time.
  246. # However, in combination with sections being sorted by alignment
  247. # it does result in much reduced padding:
  248. # text data bss dec hex
  249. # 235319 1472 5992 242783 3b45f old.so
  250. # 234104 1472 5980 241556 3af94 new.so
  251. # Without -ffunction-sections, all functions will get aligned
  252. # to 4 byte boundary by as/ld. This is arguably a bug in as.
  253. # It specifies 4 byte align for .text even if not told to do so:
  254. # Idx Name Size VMA LMA File off Algn
  255. # 0 .text xxxxxxxx 00000000 00000000 xxxxxxxx 2**2 <===!
  256. CPU_CFLAGS-y += $(call check_gcc,-ffunction-sections -fdata-sections,)
  257. ifneq ($(call check_ld,--sort-common),)
  258. CPU_LDFLAGS-y += -Wl,--sort-common
  259. endif
  260. ifneq ($(call check_ld,--sort-section alignment),)
  261. CPU_LDFLAGS-y += -Wl,--sort-section,alignment
  262. endif
  263. CPU_LDFLAGS-y+=-m32
  264. CPU_CFLAGS-y+=-m32
  265. CPU_CFLAGS-$(CONFIG_386)+=-march=i386
  266. CPU_CFLAGS-$(CONFIG_486)+=-march=i486
  267. CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
  268. CPU_CFLAGS-$(CONFIG_586)+=-march=i586
  269. CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
  270. CPU_CFLAGS-$(CONFIG_686)+=-march=i686
  271. CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
  272. CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
  273. CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
  274. CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
  275. CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-march=i686)
  276. CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686
  277. CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
  278. CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
  279. CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486)
  280. CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
  281. endif
  282. ifeq ($(TARGET_ARCH),sparc)
  283. CPU_CFLAGS-$(CONFIG_SPARC_V7)+=-mcpu=v7
  284. CPU_CFLAGS-$(CONFIG_SPARC_V8)+=-mcpu=v8
  285. CPU_CFLAGS-$(CONFIG_SPARC_V9)+=-mcpu=v9
  286. CPU_CFLAGS-$(CONFIG_SPARC_V9B)+=$(call check_gcc,-mcpu=v9b,-mcpu=ultrasparc)
  287. endif
  288. ifeq ($(TARGET_ARCH),arm)
  289. OPTIMIZATION+=-fstrict-aliasing
  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+=-fstrict-aliasing
  340. OPTIMIZATION+= $(call check_gcc,-mprefergot,)
  341. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
  342. CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
  343. CPU_CFLAGS-$(CONFIG_SH2)+=-m2
  344. CPU_CFLAGS-$(CONFIG_SH3)+=-m3
  345. ifeq ($(UCLIBC_HAS_FPU),y)
  346. CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
  347. CPU_CFLAGS-$(CONFIG_SH4)+=-m4
  348. else
  349. CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
  350. CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
  351. endif
  352. endif
  353. ifeq ($(TARGET_ARCH),sh64)
  354. OPTIMIZATION+=-fstrict-aliasing
  355. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
  356. CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
  357. CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
  358. endif
  359. ifeq ($(TARGET_ARCH),h8300)
  360. SYMBOL_PREFIX=_
  361. CPU_LDFLAGS-$(CONFIG_H8300H)+= -Wl,-ms8300h
  362. CPU_LDFLAGS-$(CONFIG_H8S) += -Wl,-ms8300s
  363. CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32
  364. CPU_CFLAGS-$(CONFIG_H8S) += -ms -mint32
  365. endif
  366. ifeq ($(TARGET_ARCH),i960)
  367. OPTIMIZATION+=-mh -mint32 #-fsigned-char
  368. endif
  369. ifeq ($(TARGET_ARCH),e1)
  370. OPTIMIZATION+=-mgnu-param
  371. endif
  372. ifeq ($(TARGET_ARCH),cris)
  373. CPU_LDFLAGS-$(CONFIG_CRIS)+=-Wl,-mcrislinux
  374. CPU_LDFLAGS-$(CONFIG_CRISV32)+=-Wl,-mcrislinux
  375. CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
  376. PICFLAG:=-fpic
  377. PIEFLAG_NAME:=-fpie
  378. endif
  379. ifeq ($(TARGET_ARCH),m68k)
  380. # -fPIC is only supported for 68020 and above. It is not supported
  381. # for 68000, 68010, or Coldfire.
  382. PICFLAG:=-fpic
  383. PIEFLAG_NAME:=-fpie
  384. endif
  385. ifeq ($(TARGET_ARCH),powerpc)
  386. # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
  387. # enough. Therefore use -fpic which will reduce code size and generates
  388. # faster code.
  389. PICFLAG:=-fpic
  390. PIEFLAG_NAME:=-fpie
  391. PPC_HAS_REL16:=$(shell echo -e "\t.text\n\taddis 11,30,_GLOBAL_OFFSET_TABLE_-.@ha" | $(CC) -c -x assembler -o /dev/null - 2> /dev/null && echo -n y || echo -n n)
  392. CPU_CFLAGS-$(PPC_HAS_REL16)+= -DHAVE_ASM_PPC_REL16
  393. CPU_CFLAGS-$(CONFIG_E500) += "-D__NO_MATH_INLINES"
  394. endif
  395. ifeq ($(TARGET_ARCH),bfin)
  396. SYMBOL_PREFIX=_
  397. ifeq ($(UCLIBC_FORMAT_FDPIC_ELF),y)
  398. CPU_CFLAGS-y:=-mfdpic
  399. CPU_LDFLAGS-y += -Wl,-melf32bfinfd
  400. PICFLAG:=-fpic
  401. PIEFLAG_NAME:=-fpie
  402. endif
  403. ifeq ($(UCLIBC_FORMAT_SHARED_FLAT),y)
  404. PICFLAG := -mleaf-id-shared-library
  405. endif
  406. endif
  407. ifeq ($(TARGET_ARCH),frv)
  408. CPU_LDFLAGS-$(CONFIG_FRV)+=-Wl,-melf32frvfd
  409. # Using -pie causes the program to have an interpreter, which is
  410. # forbidden, so we must make do with -shared. Unfortunately,
  411. # -shared by itself would get us global function descriptors
  412. # and calls through PLTs, dynamic resolution of symbols, etc,
  413. # which would break as well, but -Bsymbolic comes to the rescue.
  414. export LDPIEFLAG:=-shared -Wl,-Bsymbolic
  415. UCLIBC_LDSO=ld.so.1
  416. endif
  417. ifeq ($(strip $(TARGET_ARCH)),avr32)
  418. CPU_CFLAGS-$(CONFIG_AVR32_AP7) += -march=ap
  419. CPU_CFLAGS-$(CONFIG_LINKRELAX) += -mrelax
  420. CPU_LDFLAGS-$(CONFIG_LINKRELAX) += --relax
  421. endif
  422. ifeq ($(TARGET_ARCH),i960)
  423. SYMBOL_PREFIX=_
  424. endif
  425. ifeq ($(TARGET_ARCH),v850)
  426. SYMBOL_PREFIX=_
  427. endif
  428. ifeq ($(TARGET_ARCH),c6x)
  429. PIEFLAG:=
  430. CPU_CFLAGS-$(CONFIG_TMS320C64X) += -march=c64x
  431. CPU_CFLAGS-$(CONFIG_TMS320C64XPLUS) += -march=c64x+
  432. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
  433. CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
  434. CPU_LDFLAGS-y += $(CPU_CFLAGS)
  435. endif
  436. # Keep the check_gcc from being needlessly executed
  437. ifndef PIEFLAG
  438. export PIEFLAG:=$(call check_gcc,$(PIEFLAG_NAME),$(PICFLAG))
  439. endif
  440. # We need to keep track of both the CC PIE flag (above) as
  441. # well as the LD PIE flag (below) because we can't rely on
  442. # gcc passing -pie if we used -fPIE. We need to directly use -pie
  443. # instead of -Wl,-pie as gcc picks up the wrong startfile/endfile
  444. ifndef LDPIEFLAG
  445. export LDPIEFLAG:=$(shell $(LD) --help 2>/dev/null | grep -q -- -pie && echo "-pie")
  446. endif
  447. # Check for --as-needed support in linker
  448. ifndef LD_FLAG_ASNEEDED
  449. _LD_FLAG_ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -- --as-needed)
  450. ifneq ($(_LD_FLAG_ASNEEDED),)
  451. export LD_FLAG_ASNEEDED:=--as-needed
  452. endif
  453. endif
  454. ifndef LD_FLAG_NO_ASNEEDED
  455. ifdef LD_FLAG_ASNEEDED
  456. export LD_FLAG_NO_ASNEEDED:=--no-as-needed
  457. endif
  458. endif
  459. ifndef CC_FLAG_ASNEEDED
  460. ifdef LD_FLAG_ASNEEDED
  461. export CC_FLAG_ASNEEDED:=-Wl,$(LD_FLAG_ASNEEDED)
  462. endif
  463. endif
  464. ifndef CC_FLAG_NO_ASNEEDED
  465. ifdef LD_FLAG_NO_ASNEEDED
  466. export CC_FLAG_NO_ASNEEDED:=-Wl,$(LD_FLAG_NO_ASNEEDED)
  467. endif
  468. endif
  469. link.asneeded = $(if $(and $(CC_FLAG_ASNEEDED),$(CC_FLAG_NO_ASNEEDED)),$(CC_FLAG_ASNEEDED) $(1) $(CC_FLAG_NO_ASNEEDED))
  470. # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
  471. ifndef ASNEEDED
  472. export ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -q -- --as-needed && echo "AS_NEEDED ( $(UCLIBC_LDSO) )" || echo "$(UCLIBC_LDSO)")
  473. ifeq ($(UCLIBC_HAS_BACKTRACE),y)
  474. # Only used in installed libc.so linker script
  475. UBACKTRACE_FULL_NAME := $(RUNTIME_PREFIX)lib/$(UBACKTRACE_DSO)
  476. export UBACKTRACE_ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -q -- --as-needed && echo "AS_NEEDED ( $(UBACKTRACE_FULL_NAME) )" || echo "$(UBACKTRACE_FULL_NAME)")
  477. else
  478. export UBACKTRACE_ASNEEDED:=""
  479. endif
  480. endif
  481. # Add a bunch of extra pedantic annoyingly strict checks
  482. XWARNINGS=$(call qstrip,$(WARNINGS))
  483. XWARNINGS+=$(foreach w,\
  484. -Wstrict-prototypes \
  485. -fno-strict-aliasing \
  486. , $(call check_gcc,$(w),))
  487. ifeq ($(EXTRA_WARNINGS),y)
  488. XWARNINGS+=$(foreach w,\
  489. -Wformat=2 \
  490. -Wmissing-noreturn \
  491. -Wmissing-format-attribute \
  492. -Wmissing-prototypes \
  493. -Wmissing-declarations \
  494. -Wnested-externs \
  495. -Wnonnull \
  496. -Wold-style-declaration \
  497. -Wold-style-definition \
  498. -Wshadow \
  499. -Wundef \
  500. , $(call check_gcc,$(w),))
  501. # Works only w/ gcc-3.4 and up, can't be checked for gcc-3.x w/ check_gcc()
  502. #XWARNINGS+=-Wdeclaration-after-statement
  503. endif
  504. CPU_CFLAGS=$(call qstrip,$(CPU_CFLAGS-y))
  505. SSP_DISABLE_FLAGS ?= $(call check_gcc,-fno-stack-protector,)
  506. ifeq ($(UCLIBC_BUILD_SSP),y)
  507. SSP_CFLAGS := $(call check_gcc,-fno-stack-protector-all,)
  508. SSP_CFLAGS += $(call check_gcc,-fstack-protector,)
  509. SSP_ALL_CFLAGS ?= $(call check_gcc,-fstack-protector-all,)
  510. else
  511. SSP_CFLAGS := $(SSP_DISABLE_FLAGS)
  512. endif
  513. NOSTDLIB_CFLAGS:=$(call check_gcc,-nostdlib,)
  514. # Collect all CFLAGS components
  515. CFLAGS := -include $(top_srcdir)include/libc-symbols.h \
  516. $(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
  517. -nostdinc -I$(top_builddir)include -I$(top_srcdir)include -I. \
  518. -I$(top_srcdir)libc/sysdeps/linux \
  519. -I$(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH)
  520. ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS)),"")
  521. CFLAGS += $(call qstrip,$(UCLIBC_EXTRA_CFLAGS))
  522. endif
  523. # We need this to be checked within libc-symbols.h
  524. ifneq ($(HAVE_SHARED),y)
  525. CFLAGS += -DSTATIC
  526. endif
  527. LDFLAG_WARN_ONCE:=$(if $(call check_ld,--warn-once),-Wl$(comma)--warn-once)
  528. LDFLAG_SORT_COMMON:=$(if $(call check_ld,--sort-common),-Wl$(comma)--sort-common)
  529. LDFLAG_DISCARD_ALL:=$(if $(call check_ld,--discard-all),-Wl$(comma)--discard-all)
  530. LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -shared \
  531. -Wl,--warn-common $(LDFLAG_WARN_ONCE) -Wl,-z,combreloc
  532. # binutils-2.16.1 warns about ignored sections, 2.16.91.0.3 and newer are ok
  533. #LDFLAGS_NOSTRIP+=$(call check_ld,--gc-sections)
  534. ifeq ($(UCLIBC_BUILD_RELRO),y)
  535. LDFLAGS_NOSTRIP+=-Wl,-z,relro
  536. endif
  537. ifeq ($(UCLIBC_BUILD_NOW),y)
  538. LDFLAGS_NOSTRIP+=-Wl,-z,now
  539. endif
  540. ifeq ($(LDSO_GNU_HASH_SUPPORT),y)
  541. # Be sure that binutils support it
  542. LDFLAGS_GNUHASH:=$(call check_ld,--hash-style=gnu)
  543. ifeq ($(LDFLAGS_GNUHASH),)
  544. ifneq ($(filter-out $(clean_targets) install_headers headers-y,$(MAKECMDGOALS)),)
  545. $(error Your binutils do not support --hash-style option, while you want to use it)
  546. endif
  547. else
  548. LDFLAGS_NOSTRIP += -Wl,$(LDFLAGS_GNUHASH)
  549. endif
  550. endif
  551. LDFLAGS:=$(LDFLAGS_NOSTRIP) -Wl,-z,defs
  552. ifeq ($(DODEBUG),y)
  553. CFLAGS += -O0 -g3 -DDEBUG
  554. else
  555. CFLAGS += $(OPTIMIZATION)
  556. endif
  557. ifeq ($(DOSTRIP),y)
  558. LDFLAGS += -Wl,-s
  559. else
  560. STRIPTOOL := true -Stripping_disabled
  561. endif
  562. ifeq ($(DOMULTI),y)
  563. # we try to compile all sources at once into an object (IMA), but
  564. # gcc-3.3.x does not support it
  565. # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources
  566. # gcc-4.0.x supports it, supports the --combine flag, but does not need it
  567. # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless
  568. ifeq ($(GCC_MAJOR_VER),3)
  569. DOMULTI:=n
  570. else
  571. CFLAGS+=$(call check_gcc,--combine,)
  572. endif
  573. else
  574. DOMULTI:=n
  575. endif
  576. ifneq ($(strip $(UCLIBC_EXTRA_LDFLAGS)),"")
  577. LDFLAGS += $(call qstrip,$(UCLIBC_EXTRA_LDFLAGS))
  578. endif
  579. ifeq ($(UCLIBC_HAS_THREADS),y)
  580. ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
  581. PTNAME := nptl
  582. CFLAGS += -DHAVE_FORCED_UNWIND
  583. else
  584. ifeq ($(LINUXTHREADS_OLD),y)
  585. PTNAME := linuxthreads.old
  586. else
  587. PTNAME := linuxthreads
  588. endif
  589. endif
  590. PTDIR := libpthread/$(PTNAME)
  591. # set up system dependencies include dirs (NOTE: order matters!)
  592. ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
  593. PTINC:= -I$(top_builddir)$(PTDIR) \
  594. -I$(top_srcdir)$(PTDIR) \
  595. $(if $(TARGET_ARCH),-I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH)/$(TARGET_SUBARCH)) \
  596. -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
  597. -I$(top_builddir)$(PTDIR)/sysdeps/$(TARGET_ARCH) \
  598. -I$(top_srcdir)$(PTDIR)/sysdeps/$(TARGET_ARCH) \
  599. -I$(top_builddir)$(PTDIR)/sysdeps/unix/sysv/linux \
  600. -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux \
  601. -I$(top_srcdir)$(PTDIR)/sysdeps/pthread \
  602. -I$(top_srcdir)$(PTDIR)/sysdeps/pthread/bits \
  603. -I$(top_srcdir)$(PTDIR)/sysdeps/generic \
  604. -I$(top_srcdir)ldso/ldso/$(TARGET_ARCH) \
  605. -I$(top_srcdir)ldso/include
  606. #
  607. # Test for TLS if NPTL support was selected.
  608. #
  609. GCC_HAS_TLS=$(shell \
  610. echo "extern __thread int foo;" | $(CC) -o /dev/null -S -xc - 2>&1)
  611. ifneq ($(GCC_HAS_TLS),)
  612. gcc_tls_test_fail:
  613. @echo "####";
  614. @echo "#### Your compiler does not support TLS and you are trying to build uClibc";
  615. @echo "#### with NPTL support. Upgrade your binutils and gcc to versions which";
  616. @echo "#### support TLS for your architecture. Do not contact uClibc maintainers";
  617. @echo "#### about this problem.";
  618. @echo "####";
  619. @echo "#### Exiting...";
  620. @echo "####";
  621. @exit 1;
  622. endif
  623. else
  624. PTINC := \
  625. -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
  626. -I$(top_srcdir)$(PTDIR)/sysdeps/$(TARGET_ARCH) \
  627. -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux \
  628. -I$(top_srcdir)$(PTDIR)/sysdeps/pthread \
  629. -I$(top_srcdir)$(PTDIR) \
  630. -I$(top_srcdir)libpthread
  631. endif
  632. CFLAGS+=$(PTINC)
  633. else
  634. PTNAME :=
  635. PTINC :=
  636. endif
  637. CFLAGS += -I$(top_srcdir)libc/sysdeps/linux/common
  638. CFLAGS += -I$(KERNEL_HEADERS)
  639. #CFLAGS += -iwithprefix include-fixed -iwithprefix include
  640. CC_IPREFIX := $(shell $(CC) --print-file-name=include)
  641. CC_INC := -isystem $(dir $(CC_IPREFIX))include-fixed -isystem $(CC_IPREFIX)
  642. CFLAGS += $(CC_INC)
  643. ifneq ($(DOASSERTS),y)
  644. CFLAGS+=-DNDEBUG
  645. endif
  646. ifeq ($(SYMBOL_PREFIX),_)
  647. CFLAGS+=-D__UCLIBC_UNDERSCORES__
  648. endif
  649. # Keep the check_as from being needlessly executed
  650. ifndef ASFLAGS_NOEXEC
  651. ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
  652. export ASFLAGS_NOEXEC := $(call check_as,--noexecstack)
  653. else
  654. export ASFLAGS_NOEXEC :=
  655. endif
  656. endif
  657. ASFLAGS = $(ASFLAGS_NOEXEC)
  658. LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
  659. LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
  660. LIBGCC_DIR:=$(dir $(LIBGCC))
  661. # moved from libpthread/linuxthreads
  662. ifeq ($(UCLIBC_CTOR_DTOR),y)
  663. SHARED_START_FILES:=$(top_builddir)lib/crti.o $(LIBGCC_DIR)crtbeginS.o
  664. SHARED_END_FILES:=$(LIBGCC_DIR)crtendS.o $(top_builddir)lib/crtn.o
  665. endif
  666. LOCAL_INSTALL_PATH := install_dir