Rules.mak 24 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 :=-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 ($(TARGET_ARCH),sh)
  186. CPU_CFLAGS-y += -msoft-float
  187. endif
  188. endif
  189. endif
  190. ifeq ($(TARGET_ARCH),arm)
  191. # No longer needed with current toolchains, but leave it here for now.
  192. # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
  193. # LDADD_LIBFLOAT=-lfloat
  194. endif
  195. endif
  196. CPU_CFLAGS-y += $(call check_gcc,-std=gnu99,)
  197. CPU_CFLAGS-$(UCLIBC_FORMAT_SHARED_FLAT) += -mid-shared-library
  198. CPU_CFLAGS-$(UCLIBC_FORMAT_FLAT_SEP_DATA) += -msep-data
  199. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN) += -Wl,-EL
  200. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN) += -Wl,-EB
  201. PICFLAG-y := -fPIC
  202. PICFLAG-$(UCLIBC_FORMAT_FDPIC_ELF) := -mfdpic
  203. PICFLAG := $(PICFLAG-y)
  204. PIEFLAG_NAME:=-fPIE
  205. # Some nice CPU specific optimizations
  206. ifeq ($(TARGET_ARCH),i386)
  207. OPTIMIZATION+=$(call check_gcc,-fomit-frame-pointer,)
  208. ifeq ($(CONFIG_386)$(CONFIG_486)$(CONFIG_586)$(CONFIG_586MMX),y)
  209. # Non-SSE capable processor.
  210. # NB: this may make SSE insns segfault!
  211. # -O1 -march=pentium3, -Os -msse etc are known to be affected.
  212. # See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685
  213. # -m32 is needed if host is 64-bit
  214. OPTIMIZATION+=$(call check_gcc,-m32 -mpreferred-stack-boundary=2,)
  215. else
  216. OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=4,)
  217. endif
  218. # Choice of alignment (please document why!)
  219. # -falign-labels: in-line labels
  220. # (reachable by normal code flow, aligning will insert nops
  221. # which will be executed - may even make things slower)
  222. # -falign-jumps: reachable only by a jump
  223. # Generic: no alignment at all (smallest code)
  224. GCC_FALIGN=$(call check_gcc,-falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1,-malign-jumps=1 -malign-loops=1)
  225. ifeq ($(CONFIG_K7),y)
  226. # Align functions to four bytes, use default for jumps and loops (why?)
  227. GCC_FALIGN=$(call check_gcc,-falign-functions=4 -falign-labels=1,-malign-functions=4)
  228. endif
  229. ifeq ($(CONFIG_CRUSOE),y)
  230. # Use compiler's default for functions, jumps and loops (why?)
  231. GCC_FALIGN=$(call check_gcc,-falign-functions=0 -falign-labels=1,-malign-functions=0)
  232. endif
  233. ifeq ($(CONFIG_CYRIXIII),y)
  234. # Use compiler's default for functions, jumps and loops (why?)
  235. GCC_FALIGN=$(call check_gcc,-falign-functions=0 -falign-labels=1,-malign-functions=0)
  236. endif
  237. OPTIMIZATION+=$(GCC_FALIGN)
  238. # Putting each function and data object into its own section
  239. # allows for kbytes of less text if users link against static uclibc
  240. # using ld --gc-sections.
  241. # ld 2.18 can't do that (yet?) for shared libraries, so we itself
  242. # do not use --gc-sections at shared lib link time.
  243. # However, in combination with sections being sorted by alignment
  244. # it does result in much reduced padding:
  245. # text data bss dec hex
  246. # 235319 1472 5992 242783 3b45f old.so
  247. # 234104 1472 5980 241556 3af94 new.so
  248. # Without -ffunction-sections, all functions will get aligned
  249. # to 4 byte boundary by as/ld. This is arguably a bug in as.
  250. # It specifies 4 byte align for .text even if not told to do so:
  251. # Idx Name Size VMA LMA File off Algn
  252. # 0 .text xxxxxxxx 00000000 00000000 xxxxxxxx 2**2 <===!
  253. CPU_CFLAGS-y += $(call check_gcc,-ffunction-sections -fdata-sections,)
  254. ifneq ($(call check_ld,--sort-common),)
  255. CPU_LDFLAGS-y += -Wl,--sort-common
  256. endif
  257. ifneq ($(call check_ld,--sort-section alignment),)
  258. CPU_LDFLAGS-y += -Wl,--sort-section,alignment
  259. endif
  260. CPU_LDFLAGS-y+=-m32
  261. CPU_CFLAGS-y+=-m32
  262. CPU_CFLAGS-$(CONFIG_386)+=-march=i386
  263. CPU_CFLAGS-$(CONFIG_486)+=-march=i486
  264. CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
  265. CPU_CFLAGS-$(CONFIG_586)+=-march=i586
  266. CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
  267. CPU_CFLAGS-$(CONFIG_686)+=-march=i686
  268. CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
  269. CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
  270. CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
  271. CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
  272. CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-march=i686)
  273. CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686
  274. CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
  275. CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
  276. CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486)
  277. CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
  278. endif
  279. ifeq ($(TARGET_ARCH),sparc)
  280. CPU_CFLAGS-$(CONFIG_SPARC_V7)+=-mcpu=v7
  281. CPU_CFLAGS-$(CONFIG_SPARC_V8)+=-mcpu=v8
  282. CPU_CFLAGS-$(CONFIG_SPARC_V9)+=-mcpu=v9
  283. CPU_CFLAGS-$(CONFIG_SPARC_V9B)+=$(call check_gcc,-mcpu=v9b,-mcpu=ultrasparc)
  284. endif
  285. ifeq ($(TARGET_ARCH),arm)
  286. OPTIMIZATION+=-fstrict-aliasing
  287. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
  288. CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
  289. CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
  290. CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
  291. CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
  292. CPU_CFLAGS-$(CONFIG_ARM7TDMI)+=-mtune=arm7tdmi -march=armv4t
  293. CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4t
  294. CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4t
  295. CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4t
  296. CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9e -march=armv5te
  297. CPU_CFLAGS-$(CONFIG_ARM10T)+=-mtune=arm10tdmi -march=armv5t
  298. CPU_CFLAGS-$(CONFIG_ARM1136JF_S)+=-mtune=arm1136jf-s -march=armv6
  299. CPU_CFLAGS-$(CONFIG_ARM1176JZ_S)+=-mtune=arm1176jz-s -march=armv6
  300. CPU_CFLAGS-$(CONFIG_ARM1176JZF_S)+=-mtune=arm1176jzf-s -march=armv6
  301. CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
  302. CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
  303. CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
  304. CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv5te -Wa,-mcpu=xscale
  305. CPU_CFLAGS-$(CONFIG_ARM_IWMMXT)+=-march=iwmmxt -Wa,-mcpu=iwmmxt -mabi=iwmmxt
  306. CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M3)+=-mcpu=cortex-m3 -mthumb
  307. CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M1)+=-mcpu=cortex-m1 -mthumb
  308. endif
  309. ifeq ($(TARGET_ARCH),mips)
  310. OPTIMIZATION+=-mno-split-addresses
  311. CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
  312. CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
  313. CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
  314. CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
  315. CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
  316. CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32R2)+=-march=mips32r2 -mtune=mips32r2
  317. CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
  318. ifeq ($(strip $(ARCH_BIG_ENDIAN)),y)
  319. CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64btsmip
  320. CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32btsmip
  321. endif
  322. ifeq ($(strip $(ARCH_LITTLE_ENDIAN)),y)
  323. CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64ltsmip
  324. CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32ltsmip
  325. endif
  326. CPU_CFLAGS-$(CONFIG_MIPS_N64_ABI)+=-mabi=64
  327. CPU_CFLAGS-$(CONFIG_MIPS_O32_ABI)+=-mabi=32
  328. CPU_CFLAGS-$(CONFIG_MIPS_N32_ABI)+=-mabi=n32
  329. endif
  330. ifeq ($(TARGET_ARCH),nios)
  331. OPTIMIZATION+=-funaligned-struct-hack
  332. CPU_LDFLAGS-y+=-Wl,-m32
  333. CPU_CFLAGS-y+=-Wl,-m32
  334. endif
  335. ifeq ($(TARGET_ARCH),sh)
  336. OPTIMIZATION+=-fstrict-aliasing
  337. OPTIMIZATION+= $(call check_gcc,-mprefergot,)
  338. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
  339. CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
  340. CPU_CFLAGS-$(CONFIG_SH2)+=-m2
  341. CPU_CFLAGS-$(CONFIG_SH3)+=-m3
  342. ifeq ($(UCLIBC_HAS_FPU),y)
  343. CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
  344. CPU_CFLAGS-$(CONFIG_SH4)+=-m4
  345. else
  346. CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
  347. CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
  348. endif
  349. endif
  350. ifeq ($(TARGET_ARCH),sh64)
  351. OPTIMIZATION+=-fstrict-aliasing
  352. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
  353. CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
  354. CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
  355. endif
  356. ifeq ($(TARGET_ARCH),h8300)
  357. SYMBOL_PREFIX=_
  358. CPU_LDFLAGS-$(CONFIG_H8300H)+= -Wl,-ms8300h
  359. CPU_LDFLAGS-$(CONFIG_H8S) += -Wl,-ms8300s
  360. CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32
  361. CPU_CFLAGS-$(CONFIG_H8S) += -ms -mint32
  362. endif
  363. ifeq ($(TARGET_ARCH),i960)
  364. OPTIMIZATION+=-mh -mint32 #-fsigned-char
  365. endif
  366. ifeq ($(TARGET_ARCH),e1)
  367. OPTIMIZATION+=-mgnu-param
  368. endif
  369. ifeq ($(TARGET_ARCH),cris)
  370. CPU_LDFLAGS-$(CONFIG_CRIS)+=-Wl,-mcrislinux
  371. CPU_LDFLAGS-$(CONFIG_CRISV32)+=-Wl,-mcrislinux
  372. CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
  373. PICFLAG:=-fpic
  374. PIEFLAG_NAME:=-fpie
  375. endif
  376. ifeq ($(TARGET_ARCH),m68k)
  377. # -fPIC is only supported for 68020 and above. It is not supported
  378. # for 68000, 68010, or Coldfire.
  379. PICFLAG:=-fpic
  380. PIEFLAG_NAME:=-fpie
  381. endif
  382. ifeq ($(TARGET_ARCH),powerpc)
  383. # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
  384. # enough. Therefore use -fpic which will reduce code size and generates
  385. # faster code.
  386. PICFLAG:=-fpic
  387. PIEFLAG_NAME:=-fpie
  388. PPC_HAS_REL16:=$(shell echo -e "\t.text\n\taddis 11,30,_GLOBAL_OFFSET_TABLE_-.@ha" | $(CC) -c -x assembler -o /dev/null - 2> /dev/null && echo -n y || echo -n n)
  389. CPU_CFLAGS-$(PPC_HAS_REL16)+= -DHAVE_ASM_PPC_REL16
  390. CPU_CFLAGS-$(CONFIG_E500) += "-D__NO_MATH_INLINES"
  391. endif
  392. ifeq ($(TARGET_ARCH),bfin)
  393. SYMBOL_PREFIX=_
  394. ifeq ($(UCLIBC_FORMAT_FDPIC_ELF),y)
  395. CPU_CFLAGS-y:=-mfdpic
  396. CPU_LDFLAGS-y += -Wl,-melf32bfinfd
  397. PICFLAG:=-fpic
  398. PIEFLAG_NAME:=-fpie
  399. endif
  400. ifeq ($(UCLIBC_FORMAT_SHARED_FLAT),y)
  401. PICFLAG := -mleaf-id-shared-library
  402. endif
  403. endif
  404. ifeq ($(TARGET_ARCH),frv)
  405. CPU_LDFLAGS-$(CONFIG_FRV)+=-Wl,-melf32frvfd
  406. # Using -pie causes the program to have an interpreter, which is
  407. # forbidden, so we must make do with -shared. Unfortunately,
  408. # -shared by itself would get us global function descriptors
  409. # and calls through PLTs, dynamic resolution of symbols, etc,
  410. # which would break as well, but -Bsymbolic comes to the rescue.
  411. export LDPIEFLAG:=-shared -Wl,-Bsymbolic
  412. UCLIBC_LDSO=ld.so.1
  413. endif
  414. ifeq ($(strip $(TARGET_ARCH)),avr32)
  415. CPU_CFLAGS-$(CONFIG_AVR32_AP7) += -march=ap
  416. CPU_CFLAGS-$(CONFIG_LINKRELAX) += -mrelax
  417. CPU_LDFLAGS-$(CONFIG_LINKRELAX) += --relax
  418. endif
  419. ifeq ($(TARGET_ARCH),i960)
  420. SYMBOL_PREFIX=_
  421. endif
  422. ifeq ($(TARGET_ARCH),microblaze)
  423. SYMBOL_PREFIX=_
  424. endif
  425. ifeq ($(TARGET_ARCH),v850)
  426. SYMBOL_PREFIX=_
  427. endif
  428. # Keep the check_gcc from being needlessly executed
  429. ifndef PIEFLAG
  430. export PIEFLAG:=$(call check_gcc,$(PIEFLAG_NAME),$(PICFLAG))
  431. endif
  432. # We need to keep track of both the CC PIE flag (above) as
  433. # well as the LD PIE flag (below) because we can't rely on
  434. # gcc passing -pie if we used -fPIE. We need to directly use -pie
  435. # instead of -Wl,-pie as gcc picks up the wrong startfile/endfile
  436. ifndef LDPIEFLAG
  437. export LDPIEFLAG:=$(shell $(LD) --help 2>/dev/null | grep -q -- -pie && echo "-pie")
  438. endif
  439. # Check for --as-needed support in linker
  440. ifndef LD_FLAG_ASNEEDED
  441. _LD_FLAG_ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -- --as-needed)
  442. ifneq ($(_LD_FLAG_ASNEEDED),)
  443. export LD_FLAG_ASNEEDED:=--as-needed
  444. endif
  445. endif
  446. ifndef LD_FLAG_NO_ASNEEDED
  447. ifdef LD_FLAG_ASNEEDED
  448. export LD_FLAG_NO_ASNEEDED:=--no-as-needed
  449. endif
  450. endif
  451. ifndef CC_FLAG_ASNEEDED
  452. ifdef LD_FLAG_ASNEEDED
  453. export CC_FLAG_ASNEEDED:=-Wl,$(LD_FLAG_ASNEEDED)
  454. endif
  455. endif
  456. ifndef CC_FLAG_NO_ASNEEDED
  457. ifdef LD_FLAG_NO_ASNEEDED
  458. export CC_FLAG_NO_ASNEEDED:=-Wl,$(LD_FLAG_NO_ASNEEDED)
  459. endif
  460. endif
  461. link.asneeded = $(if $(and $(CC_FLAG_ASNEEDED),$(CC_FLAG_NO_ASNEEDED)),$(CC_FLAG_ASNEEDED) $(1) $(CC_FLAG_NO_ASNEEDED))
  462. # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
  463. ifndef ASNEEDED
  464. export ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -q -- --as-needed && echo "AS_NEEDED ( $(UCLIBC_LDSO) )" || echo "$(UCLIBC_LDSO)")
  465. ifeq ($(UCLIBC_HAS_BACKTRACE),y)
  466. # Only used in installed libc.so linker script
  467. UBACKTRACE_FULL_NAME := $(RUNTIME_PREFIX)lib/$(UBACKTRACE_DSO)
  468. export UBACKTRACE_ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -q -- --as-needed && echo "AS_NEEDED ( $(UBACKTRACE_FULL_NAME) )" || echo "$(UBACKTRACE_FULL_NAME)")
  469. else
  470. export UBACKTRACE_ASNEEDED:=""
  471. endif
  472. endif
  473. # Add a bunch of extra pedantic annoyingly strict checks
  474. XWARNINGS=$(call qstrip,$(WARNINGS))
  475. XWARNINGS+=$(foreach w,\
  476. -Wstrict-prototypes \
  477. -fno-strict-aliasing \
  478. , $(call check_gcc,$(w),))
  479. ifeq ($(EXTRA_WARNINGS),y)
  480. XWARNINGS+=$(foreach w,\
  481. -Wformat=2 \
  482. -Wmissing-noreturn \
  483. -Wmissing-format-attribute \
  484. -Wmissing-prototypes \
  485. -Wmissing-declarations \
  486. -Wnested-externs \
  487. -Wnonnull \
  488. -Wold-style-declaration \
  489. -Wold-style-definition \
  490. -Wshadow \
  491. -Wundef \
  492. , $(call check_gcc,$(w),))
  493. # Works only w/ gcc-3.4 and up, can't be checked for gcc-3.x w/ check_gcc()
  494. #XWARNINGS+=-Wdeclaration-after-statement
  495. endif
  496. CPU_CFLAGS=$(call qstrip,$(CPU_CFLAGS-y))
  497. SSP_DISABLE_FLAGS ?= $(call check_gcc,-fno-stack-protector,)
  498. ifeq ($(UCLIBC_BUILD_SSP),y)
  499. SSP_CFLAGS := $(call check_gcc,-fno-stack-protector-all,)
  500. SSP_CFLAGS += $(call check_gcc,-fstack-protector,)
  501. SSP_ALL_CFLAGS ?= $(call check_gcc,-fstack-protector-all,)
  502. else
  503. SSP_CFLAGS := $(SSP_DISABLE_FLAGS)
  504. endif
  505. NOSTDLIB_CFLAGS:=$(call check_gcc,-nostdlib,)
  506. # Collect all CFLAGS components
  507. CFLAGS := -include $(top_srcdir)include/libc-symbols.h \
  508. $(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
  509. -nostdinc -I$(top_builddir)include -I$(top_srcdir)include -I. \
  510. -I$(top_srcdir)libc/sysdeps/linux \
  511. -I$(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH)
  512. ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS)),"")
  513. CFLAGS += $(call qstrip,$(UCLIBC_EXTRA_CFLAGS))
  514. endif
  515. # We need this to be checked within libc-symbols.h
  516. ifneq ($(HAVE_SHARED),y)
  517. CFLAGS += -DSTATIC
  518. endif
  519. LDFLAG_WARN_ONCE:=$(if $(call check_ld,--warn-once),-Wl$(comma)--warn-once)
  520. LDFLAG_SORT_COMMON:=$(if $(call check_ld,--sort-common),-Wl$(comma)--sort-common)
  521. LDFLAG_DISCARD_ALL:=$(if $(call check_ld,--discard-all),-Wl$(comma)--discard-all)
  522. LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -shared \
  523. -Wl,--warn-common $(LDFLAG_WARN_ONCE) -Wl,-z,combreloc
  524. # binutils-2.16.1 warns about ignored sections, 2.16.91.0.3 and newer are ok
  525. #LDFLAGS_NOSTRIP+=$(call check_ld,--gc-sections)
  526. ifeq ($(UCLIBC_BUILD_RELRO),y)
  527. LDFLAGS_NOSTRIP+=-Wl,-z,relro
  528. endif
  529. ifeq ($(UCLIBC_BUILD_NOW),y)
  530. LDFLAGS_NOSTRIP+=-Wl,-z,now
  531. endif
  532. ifeq ($(LDSO_GNU_HASH_SUPPORT),y)
  533. # Be sure that binutils support it
  534. LDFLAGS_GNUHASH:=$(call check_ld,--hash-style=gnu)
  535. ifeq ($(LDFLAGS_GNUHASH),)
  536. ifneq ($(filter-out $(clean_targets) install_headers headers-y,$(MAKECMDGOALS)),)
  537. $(error Your binutils do not support --hash-style option, while you want to use it)
  538. endif
  539. else
  540. LDFLAGS_NOSTRIP += -Wl,$(LDFLAGS_GNUHASH)
  541. endif
  542. endif
  543. LDFLAGS:=$(LDFLAGS_NOSTRIP) -Wl,-z,defs
  544. ifeq ($(DODEBUG),y)
  545. CFLAGS += -O0 -g3 -DDEBUG
  546. else
  547. CFLAGS += $(OPTIMIZATION)
  548. endif
  549. ifeq ($(DOSTRIP),y)
  550. LDFLAGS += -Wl,-s
  551. else
  552. STRIPTOOL := true -Stripping_disabled
  553. endif
  554. ifeq ($(DOMULTI),y)
  555. # we try to compile all sources at once into an object (IMA), but
  556. # gcc-3.3.x does not support it
  557. # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources
  558. # gcc-4.0.x supports it, supports the --combine flag, but does not need it
  559. # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless
  560. ifeq ($(GCC_MAJOR_VER),3)
  561. DOMULTI:=n
  562. else
  563. CFLAGS+=$(call check_gcc,--combine,)
  564. endif
  565. else
  566. DOMULTI:=n
  567. endif
  568. ifneq ($(strip $(UCLIBC_EXTRA_LDFLAGS)),"")
  569. LDFLAGS += $(call qstrip,$(UCLIBC_EXTRA_LDFLAGS))
  570. endif
  571. ifeq ($(UCLIBC_HAS_THREADS),y)
  572. ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
  573. PTNAME := nptl
  574. CFLAGS += -DHAVE_FORCED_UNWIND
  575. else
  576. ifeq ($(LINUXTHREADS_OLD),y)
  577. PTNAME := linuxthreads.old
  578. else
  579. PTNAME := linuxthreads
  580. endif
  581. endif
  582. PTDIR := libpthread/$(PTNAME)
  583. # set up system dependencies include dirs (NOTE: order matters!)
  584. ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
  585. PTINC:= -I$(top_builddir)$(PTDIR) \
  586. -I$(top_srcdir)$(PTDIR) \
  587. $(if $(TARGET_ARCH),-I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH)/$(TARGET_SUBARCH)) \
  588. -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
  589. -I$(top_builddir)$(PTDIR)/sysdeps/$(TARGET_ARCH) \
  590. -I$(top_srcdir)$(PTDIR)/sysdeps/$(TARGET_ARCH) \
  591. -I$(top_builddir)$(PTDIR)/sysdeps/unix/sysv/linux \
  592. -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux \
  593. -I$(top_srcdir)$(PTDIR)/sysdeps/pthread \
  594. -I$(top_srcdir)$(PTDIR)/sysdeps/pthread/bits \
  595. -I$(top_srcdir)ldso/ldso/$(TARGET_ARCH) \
  596. -I$(top_srcdir)ldso/include
  597. #
  598. # Test for TLS if NPTL support was selected.
  599. #
  600. GCC_HAS_TLS=$(shell \
  601. echo "extern __thread int foo;" | $(CC) -o /dev/null -S -xc - 2>&1)
  602. ifneq ($(GCC_HAS_TLS),)
  603. gcc_tls_test_fail:
  604. @echo "####";
  605. @echo "#### Your compiler does not support TLS and you are trying to build uClibc";
  606. @echo "#### with NPTL support. Upgrade your binutils and gcc to versions which";
  607. @echo "#### support TLS for your architecture. Do not contact uClibc maintainers";
  608. @echo "#### about this problem.";
  609. @echo "####";
  610. @echo "#### Exiting...";
  611. @echo "####";
  612. @exit 1;
  613. endif
  614. else
  615. PTINC := \
  616. -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
  617. -I$(top_srcdir)$(PTDIR)/sysdeps/$(TARGET_ARCH) \
  618. -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux \
  619. -I$(top_srcdir)$(PTDIR)/sysdeps/pthread \
  620. -I$(top_srcdir)$(PTDIR) \
  621. -I$(top_srcdir)libpthread
  622. endif
  623. CFLAGS+=$(PTINC)
  624. else
  625. PTNAME :=
  626. PTINC :=
  627. endif
  628. CFLAGS += -I$(top_srcdir)libc/sysdeps/linux/common
  629. CFLAGS += -I$(KERNEL_HEADERS)
  630. #CFLAGS += -iwithprefix include-fixed -iwithprefix include
  631. CC_IPREFIX := $(shell $(CC) --print-file-name=include)
  632. CC_INC := -isystem $(dir $(CC_IPREFIX))include-fixed -isystem $(CC_IPREFIX)
  633. CFLAGS += $(CC_INC)
  634. ifneq ($(DOASSERTS),y)
  635. CFLAGS+=-DNDEBUG
  636. endif
  637. ifeq ($(SYMBOL_PREFIX),_)
  638. CFLAGS+=-D__UCLIBC_UNDERSCORES__
  639. endif
  640. # Keep the check_as from being needlessly executed
  641. ifndef ASFLAGS_NOEXEC
  642. ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
  643. export ASFLAGS_NOEXEC := $(call check_as,--noexecstack)
  644. else
  645. export ASFLAGS_NOEXEC :=
  646. endif
  647. endif
  648. ASFLAGS = $(ASFLAGS_NOEXEC)
  649. LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
  650. LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
  651. LIBGCC_DIR:=$(dir $(LIBGCC))
  652. # moved from libpthread/linuxthreads
  653. ifeq ($(UCLIBC_CTOR_DTOR),y)
  654. SHARED_START_FILES:=$(top_builddir)lib/crti.o $(LIBGCC_DIR)crtbeginS.o
  655. SHARED_END_FILES:=$(LIBGCC_DIR)crtendS.o $(top_builddir)lib/crtn.o
  656. endif
  657. LOCAL_INSTALL_PATH := install_dir