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