Rules.mak 21 KB

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  1. # Rules.make for uClibc
  2. #
  3. # Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
  4. #
  5. # Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
  6. #
  7. # check for proper make version
  8. ifneq ($(findstring 3.7,$(MAKE_VERSION)),)
  9. $(error Your make is too old $(MAKE_VERSION). Go get at least 3.80)
  10. endif
  11. #-----------------------------------------------------------
  12. # This file contains rules which are shared between multiple
  13. # Makefiles. All normal configuration options live in the
  14. # file named ".config". Don't mess with this file unless
  15. # you know what you are doing.
  16. #-----------------------------------------------------------
  17. # If you are running a cross compiler, you will want to set
  18. # 'CROSS' to something more interesting ... Target
  19. # architecture is determined by asking the CC compiler what
  20. # arch it compiles things for, so unless your compiler is
  21. # broken, you should not need to specify TARGET_ARCH.
  22. #
  23. # Most people will set this stuff on the command line, i.e.
  24. # make CROSS=arm-linux-
  25. # will build uClibc for 'arm'.
  26. ifndef CROSS
  27. CROSS=
  28. endif
  29. CC = $(CROSS)gcc
  30. AR = $(CROSS)ar
  31. LD = $(CROSS)ld
  32. NM = $(CROSS)nm
  33. STRIPTOOL = $(CROSS)strip
  34. INSTALL = install
  35. LN = ln
  36. RM = rm -f
  37. TAR = tar
  38. STRIP_FLAGS ?= -x -R .note -R .comment
  39. UNIFDEF := $(top_builddir)extra/scripts/unifdef -UUCLIBC_INTERNAL
  40. # Select the compiler needed to build binaries for your development system
  41. HOSTCC = gcc
  42. BUILD_CFLAGS = -O2 -Wall
  43. export ARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun.*/sparc/ -e s/sparc.*/sparc/ \
  44. -e s/arm.*/arm/ -e s/sa110/arm/ -e s/sh.*/sh/ \
  45. -e s/s390x/s390/ -e s/parisc.*/hppa/ \
  46. -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
  47. -e s/xtensa.*/xtensa/ )
  48. #---------------------------------------------------------
  49. # Nothing beyond this point should ever be touched by mere
  50. # mortals. Unless you hang out with the gods, you should
  51. # probably leave all this stuff alone.
  52. # Pull in the user's uClibc configuration
  53. ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
  54. -include $(top_builddir).config
  55. endif
  56. # Make certain these contain a final "/", but no "//"s.
  57. TARGET_ARCH:=$(shell grep -s '^TARGET_ARCH' $(top_builddir)/.config | sed -e 's/^TARGET_ARCH=//' -e 's/"//g')
  58. TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH))))
  59. TARGET_SUBARCH:=$(shell grep -s '^TARGET_SUBARCH' $(top_builddir)/.config | sed -e 's/^TARGET_SUBARCH=//' -e 's/"//g')
  60. TARGET_SUBARCH:=$(strip $(subst ",, $(strip $(TARGET_SUBARCH))))
  61. RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(RUNTIME_PREFIX))))))
  62. DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(DEVEL_PREFIX))))))
  63. KERNEL_HEADERS:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(KERNEL_HEADERS))))))
  64. export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_HEADERS
  65. # Now config hard core
  66. MAJOR_VERSION := 0
  67. MINOR_VERSION := 9
  68. SUBLEVEL := 29
  69. EXTRAVERSION :=
  70. VERSION := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
  71. ifneq ($(EXTRAVERSION),)
  72. VERSION := $(VERSION)$(EXTRAVERSION)
  73. endif
  74. # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
  75. LC_ALL := C
  76. export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION LC_ALL
  77. LIBC := libc
  78. SHARED_MAJORNAME := $(LIBC).so.$(MAJOR_VERSION)
  79. ifneq ($(findstring $(TARGET_ARCH) , hppa64 ia64 mips64 powerpc64 s390x sparc64 x86_64 ),)
  80. UCLIBC_LDSO_NAME := ld64-uClibc
  81. else
  82. UCLIBC_LDSO_NAME := ld-uClibc
  83. endif
  84. UCLIBC_LDSO := $(UCLIBC_LDSO_NAME).so.$(MAJOR_VERSION)
  85. NONSHARED_LIBNAME := uclibc_nonshared.a
  86. libc := $(top_builddir)lib/$(SHARED_MAJORNAME)
  87. libc.depend := $(top_builddir)lib/$(SHARED_MAJORNAME:.$(MAJOR_VERSION)=)
  88. interp := $(top_builddir)lib/interp.os
  89. ldso := $(top_builddir)lib/$(UCLIBC_LDSO)
  90. headers_dep := $(top_builddir)include/bits/sysnum.h
  91. sub_headers := $(headers_dep)
  92. #LIBS :=$(interp) -L$(top_builddir)lib -lc
  93. LIBS := $(interp) -L$(top_builddir)lib $(libc:.$(MAJOR_VERSION)=)
  94. # Make sure DESTDIR and PREFIX can be used to install
  95. # PREFIX is a uClibcism while DESTDIR is a common GNUism
  96. ifndef PREFIX
  97. PREFIX = $(DESTDIR)
  98. endif
  99. ifneq ($(HAVE_SHARED),y)
  100. libc :=
  101. interp :=
  102. ldso :=
  103. endif
  104. comma:=,
  105. space:= #
  106. ifndef CROSS
  107. CROSS=$(subst ",, $(strip $(CROSS_COMPILER_PREFIX)))
  108. endif
  109. # A nifty macro to make testing gcc features easier
  110. check_gcc=$(shell \
  111. if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
  112. then echo "$(1)"; else echo "$(2)"; fi)
  113. check_as=$(shell \
  114. if $(CC) -Wa,$(1) -Wa,-Z -c -o /dev/null -xassembler /dev/null > /dev/null 2>&1; \
  115. then echo "-Wa,$(1)"; fi)
  116. check_ld=$(shell \
  117. if $(LD) $(1) -o /dev/null -b binary /dev/null > /dev/null 2>&1; \
  118. then echo "$(1)"; fi)
  119. ARFLAGS:=cr
  120. # Flags in OPTIMIZATION are used only for non-debug builds
  121. OPTIMIZATION:=
  122. # Use '-Os' optimization if available, else use -O2, allow Config to override
  123. OPTIMIZATION+=$(call check_gcc,-Os,-O2)
  124. # Use the gcc 3.4 -funit-at-a-time optimization when available
  125. OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
  126. GCC_MAJOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 1)
  127. #GCC_MINOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 2)
  128. ifeq ($(GCC_MAJOR_VER),4)
  129. # shrinks code, results are from 4.0.2
  130. # 0.36%
  131. OPTIMIZATION+=$(call check_gcc,-fno-tree-loop-optimize,)
  132. # 0.34%
  133. OPTIMIZATION+=$(call check_gcc,-fno-tree-dominator-opts,)
  134. # 0.1%
  135. OPTIMIZATION+=$(call check_gcc,-fno-strength-reduce,)
  136. endif
  137. CPU_CFLAGS-$(UCLIBC_FORMAT_SHARED_FLAT) += -mid-shared-library
  138. CPU_CFLAGS-$(UCLIBC_FORMAT_FLAT_SEP_DATA) += -msep-data
  139. PICFLAG-y := -fPIC
  140. PICFLAG-$(UCLIBC_FORMAT_FDPIC_ELF) := -mfdpic
  141. PICFLAG := $(PICFLAG-y)
  142. PIEFLAG_NAME:=-fPIE
  143. # Some nice CPU specific optimizations
  144. ifeq ($(TARGET_ARCH),i386)
  145. OPTIMIZATION+=$(call check_gcc,-fomit-frame-pointer,)
  146. # NB: this may make SSE insns segfault!
  147. # -O1 -march=pentium3, -Os -msse etc are known to be affected.
  148. # TODO: conditionally bump to 4
  149. # (see http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685)
  150. OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=4,)
  151. # Choice of alignment (please document why!)
  152. # -falign-labels: in-line labels
  153. # (reachable by normal code flow, aligning will insert nops
  154. # which will be executed - may even make things slower)
  155. # -falign-jumps: reachable only by a jump
  156. # Generic: no alignment at all (smallest code)
  157. GCC_FALIGN=$(call check_gcc,-falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1,-malign-jumps=1 -malign-loops=1)
  158. ifeq ($(CONFIG_K7),y)
  159. # Align functions to four bytes, use default for jumps and loops (why?)
  160. GCC_FALIGN=$(call check_gcc,-falign-functions=4 -falign-labels=1,-malign-functions=4)
  161. endif
  162. ifeq ($(CONFIG_CRUSOE),y)
  163. # Use compiler's default for functions, jumps and loops (why?)
  164. GCC_FALIGN=$(call check_gcc,-falign-functions=0 -falign-labels=1,-malign-functions=0)
  165. endif
  166. ifeq ($(CONFIG_CYRIXIII),y)
  167. # Use compiler's default for functions, jumps and loops (why?)
  168. GCC_FALIGN=$(call check_gcc,-falign-functions=0 -falign-labels=1,-malign-functions=0)
  169. endif
  170. OPTIMIZATION+=$(GCC_FALIGN)
  171. # Putting each function and data object into its own section
  172. # allows for kbytes of less text if users link against static uclibc
  173. # using ld --gc-sections.
  174. # ld 2.18 can't do that (yet?) for shared libraries, so we itself
  175. # do not use --gc-sections at shared lib link time.
  176. # However, in combination with sections being sorted by alignment
  177. # it does result in much reduced padding:
  178. # text data bss dec hex
  179. # 235319 1472 5992 242783 3b45f old.so
  180. # 234104 1472 5980 241556 3af94 new.so
  181. # Without -ffunction-sections, all functions will get aligned
  182. # to 4 byte boundary by as/ld. This is arguably a bug in as.
  183. # It specifies 4 byte align for .text even if not told to do so:
  184. # Idx Name Size VMA LMA File off Algn
  185. # 0 .text xxxxxxxx 00000000 00000000 xxxxxxxx 2**2 <===!
  186. CPU_CFLAGS-y += $(call check_gcc,-ffunction-sections -fdata-sections,)
  187. ifneq ($(call check_ld,--sort-common,),)
  188. CPU_LDFLAGS-y += -Wl,--sort-common
  189. endif
  190. ifneq ($(call check_ld,--sort-section alignment),)
  191. CPU_LDFLAGS-y += -Wl,--sort-section,alignment
  192. endif
  193. CPU_LDFLAGS-y+=-m32
  194. CPU_CFLAGS-y+=-m32
  195. CPU_CFLAGS-$(CONFIG_386)+=-march=i386
  196. CPU_CFLAGS-$(CONFIG_486)+=-march=i486
  197. CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
  198. CPU_CFLAGS-$(CONFIG_586)+=-march=i586
  199. CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
  200. CPU_CFLAGS-$(CONFIG_686)+=-march=i686
  201. CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
  202. CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
  203. CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
  204. CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
  205. CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-march=i686)
  206. CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686
  207. CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
  208. CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
  209. CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486)
  210. CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
  211. endif
  212. ifeq ($(TARGET_ARCH),sparc)
  213. CPU_CFLAGS-$(CONFIG_SPARC_V7)+=-mcpu=v7
  214. CPU_CFLAGS-$(CONFIG_SPARC_V8)+=-mcpu=v8
  215. CPU_CFLAGS-$(CONFIG_SPARC_V9)+=-mcpu=v9
  216. CPU_CFLAGS-$(CONFIG_SPARC_V9B)+=$(call check_gcc,-mcpu=v9b,-mcpu=ultrasparc)
  217. endif
  218. ifeq ($(TARGET_ARCH),arm)
  219. OPTIMIZATION+=-fstrict-aliasing
  220. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-Wl,-EL
  221. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-Wl,-EB
  222. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
  223. CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
  224. CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
  225. CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
  226. CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
  227. CPU_CFLAGS-$(CONFIG_ARM7TDMI)+=-mtune=arm7tdmi -march=armv4t
  228. CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4t
  229. CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4t
  230. CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4t
  231. CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv5t
  232. CPU_CFLAGS-$(CONFIG_ARM10T)+=-mtune=arm10tdmi -march=armv5t
  233. CPU_CFLAGS-$(CONFIG_ARM1136JF_S)+=-mtune=arm1136jf-s -march=armv6
  234. CPU_CFLAGS-$(CONFIG_ARM1176JZ_S)+=-mtune=arm1176jz-s -march=armv6
  235. CPU_CFLAGS-$(CONFIG_ARM1176JZF_S)+=-mtune=arm1176jzf-s -march=armv6
  236. CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
  237. CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
  238. CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
  239. CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv5te -Wa,-mcpu=xscale
  240. CPU_CFLAGS-$(CONFIG_ARM_IWMMXT)+=-march=iwmmxt -Wa,-mcpu=iwmmxt -mabi=iwmmxt
  241. CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M3)+=-mcpu=cortex-m3 -mthumb
  242. CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M1)+=-mcpu=cortex-m1 -mthumb
  243. endif
  244. ifeq ($(TARGET_ARCH),mips)
  245. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-Wl,-EL
  246. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-Wl,-EB
  247. CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
  248. CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
  249. CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
  250. CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
  251. CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
  252. CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
  253. ifeq ($(strip $(ARCH_BIG_ENDIAN)),y)
  254. CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64btsmip
  255. CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32btsmip
  256. endif
  257. ifeq ($(strip $(ARCH_LITTLE_ENDIAN)),y)
  258. CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64ltsmip
  259. CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32ltsmip
  260. endif
  261. CPU_CFLAGS-$(CONFIG_MIPS_N64_ABI)+=-mabi=64
  262. CPU_CFLAGS-$(CONFIG_MIPS_O32_ABI)+=-mabi=32
  263. CPU_CFLAGS-$(CONFIG_MIPS_N32_ABI)+=-mabi=n32
  264. endif
  265. ifeq ($(TARGET_ARCH),nios)
  266. CPU_LDFLAGS-y+=-Wl,-m32
  267. CPU_CFLAGS-y+=-Wl,-m32
  268. endif
  269. ifeq ($(TARGET_ARCH),sh)
  270. OPTIMIZATION+=-fstrict-aliasing
  271. OPTIMIZATION+= $(call check_gcc,-mprefergot,)
  272. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-Wl,-EL
  273. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-Wl,-EB
  274. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
  275. CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
  276. CPU_CFLAGS-$(CONFIG_SH2)+=-m2
  277. CPU_CFLAGS-$(CONFIG_SH3)+=-m3
  278. ifeq ($(UCLIBC_HAS_FLOATS),y)
  279. CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
  280. CPU_CFLAGS-$(CONFIG_SH4)+=-m4
  281. else
  282. CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
  283. CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
  284. endif
  285. endif
  286. ifeq ($(TARGET_ARCH),sh64)
  287. OPTIMIZATION+=-fstrict-aliasing
  288. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):=-Wl,-EL
  289. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):=-Wl,-EB
  290. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
  291. CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
  292. CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
  293. endif
  294. ifeq ($(TARGET_ARCH),h8300)
  295. SYMBOL_PREFIX=_
  296. CPU_LDFLAGS-$(CONFIG_H8300H)+= -Wl,-ms8300h
  297. CPU_LDFLAGS-$(CONFIG_H8S) += -Wl,-ms8300s
  298. CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32
  299. CPU_CFLAGS-$(CONFIG_H8S) += -ms -mint32
  300. endif
  301. ifeq ($(TARGET_ARCH),cris)
  302. CPU_LDFLAGS-$(CONFIG_CRIS)+=-Wl,-mcrislinux
  303. CPU_LDFLAGS-$(CONFIG_CRISV32)+=-Wl,-mcrislinux
  304. CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
  305. PICFLAG:=-fpic
  306. PIEFLAG_NAME:=-fpie
  307. endif
  308. ifeq ($(TARGET_ARCH),m68k)
  309. # -fPIC is only supported for 68020 and above. It is not supported
  310. # for 68000, 68010, or Coldfire.
  311. PICFLAG:=-fpic
  312. PIEFLAG_NAME:=-fpie
  313. endif
  314. ifeq ($(TARGET_ARCH),powerpc)
  315. # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
  316. # enough. Therefore use -fpic which will reduce code size and generates
  317. # faster code.
  318. PICFLAG:=-fpic
  319. PIEFLAG_NAME:=-fpie
  320. PPC_HAS_REL16:=$(shell echo -e "\t.text\n\taddis 11,30,_GLOBAL_OFFSET_TABLE_-.@ha" | $(CC) -c -x assembler -o /dev/null - 2> /dev/null && echo -n y || echo -n n)
  321. CPU_CFLAGS-$(PPC_HAS_REL16)+= -DHAVE_ASM_PPC_REL16
  322. CPU_CFLAGS-$(CONFIG_E500) += "-D__NO_MATH_INLINES -D__NO_LONG_DOUBLE_MATH"
  323. endif
  324. ifeq ($(TARGET_ARCH),bfin)
  325. SYMBOL_PREFIX=_
  326. ifeq ($(UCLIBC_FORMAT_FDPIC_ELF),y)
  327. CPU_CFLAGS-y:=-mfdpic
  328. CPU_LDFLAGS-y += -Wl,-melf32bfinfd
  329. PICFLAG:=-fpic
  330. PIEFLAG_NAME:=-fpie
  331. endif
  332. ifeq ($(UCLIBC_FORMAT_SHARED_FLAT),y)
  333. PICFLAG := -mleaf-id-shared-library
  334. endif
  335. endif
  336. ifeq ($(TARGET_ARCH),frv)
  337. CPU_LDFLAGS-$(CONFIG_FRV)+=-Wl,-melf32frvfd
  338. # Using -pie causes the program to have an interpreter, which is
  339. # forbidden, so we must make do with -shared. Unfortunately,
  340. # -shared by itself would get us global function descriptors
  341. # and calls through PLTs, dynamic resolution of symbols, etc,
  342. # which would break as well, but -Bsymbolic comes to the rescue.
  343. export LDPIEFLAG:=-Wl,-shared -Wl,-Bsymbolic
  344. UCLIBC_LDSO=ld.so.1
  345. endif
  346. ifeq ($(strip $(TARGET_ARCH)),avr32)
  347. CPU_CFLAGS-$(CONFIG_AVR32_AP7) += -march=ap
  348. CPU_CFLAGS-$(CONFIG_LINKRELAX) += -mrelax
  349. CPU_LDFLAGS-$(CONFIG_LINKRELAX) += --relax
  350. endif
  351. ifeq ($(TARGET_ARCH),i960)
  352. SYMBOL_PREFIX=_
  353. endif
  354. ifeq ($(TARGET_ARCH),microblaze)
  355. SYMBOL_PREFIX=_
  356. endif
  357. ifeq ($(TARGET_ARCH),v850)
  358. SYMBOL_PREFIX=_
  359. endif
  360. # Keep the check_gcc from being needlessly executed
  361. ifndef PIEFLAG
  362. ifneq ($(UCLIBC_BUILD_PIE),y)
  363. export PIEFLAG:=
  364. else
  365. export PIEFLAG:=$(call check_gcc,$(PIEFLAG_NAME),$(PICFLAG))
  366. endif
  367. endif
  368. # We need to keep track of both the CC PIE flag (above) as
  369. # well as the LD PIE flag (below) because we can't rely on
  370. # gcc passing -pie if we used -fPIE
  371. ifndef LDPIEFLAG
  372. ifneq ($(UCLIBC_BUILD_PIE),y)
  373. export LDPIEFLAG:=
  374. else
  375. export LDPIEFLAG:=$(shell $(LD) --help 2>/dev/null | grep -q -- -pie && echo "-Wl,-pie")
  376. endif
  377. endif
  378. # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
  379. ifndef ASNEEDED
  380. export ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -q -- --as-needed && echo "AS_NEEDED ( $(UCLIBC_LDSO) )" || echo "$(UCLIBC_LDSO)")
  381. endif
  382. # Add a bunch of extra pedantic annoyingly strict checks
  383. XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -fno-strict-aliasing
  384. ifeq ($(EXTRA_WARNINGS),y)
  385. XWARNINGS+=-Wnested-externs -Wshadow -Wmissing-noreturn -Wmissing-format-attribute -Wformat=2
  386. XWARNINGS+=-Wmissing-prototypes -Wmissing-declarations
  387. XWARNINGS+=-Wnonnull -Wundef
  388. # works only w/ gcc-3.4 and up, can't be checked for gcc-3.x w/ check_gcc()
  389. #XWARNINGS+=-Wdeclaration-after-statement
  390. endif
  391. XARCH_CFLAGS=$(subst ",, $(strip $(ARCH_CFLAGS)))
  392. CPU_CFLAGS=$(subst ",, $(strip $(CPU_CFLAGS-y)))
  393. SSP_DISABLE_FLAGS ?= $(call check_gcc,-fno-stack-protector,)
  394. ifeq ($(UCLIBC_BUILD_SSP),y)
  395. SSP_CFLAGS := $(call check_gcc,-fno-stack-protector-all,)
  396. SSP_CFLAGS += $(call check_gcc,-fstack-protector,)
  397. SSP_ALL_CFLAGS ?= $(call check_gcc,-fstack-protector-all,)
  398. else
  399. SSP_CFLAGS := $(SSP_DISABLE_FLAGS)
  400. endif
  401. NOSTDLIB_CFLAGS:=$(call check_gcc,-nostdlib,)
  402. # Some nice CFLAGS to work with
  403. CFLAGS := -include $(top_builddir)include/libc-symbols.h \
  404. $(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
  405. -fno-builtin -nostdinc -I$(top_builddir)include -I. \
  406. -I$(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH)
  407. ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS)),"")
  408. CFLAGS += $(subst ",, $(UCLIBC_EXTRA_CFLAGS))
  409. endif
  410. LDADD_LIBFLOAT=
  411. ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
  412. # If -msoft-float isn't supported, we want an error anyway.
  413. # Hmm... might need to revisit this for arm since it has 2 different
  414. # soft float encodings.
  415. ifneq ($(TARGET_ARCH),nios)
  416. ifneq ($(TARGET_ARCH),nios2)
  417. CFLAGS += -msoft-float
  418. endif
  419. endif
  420. ifeq ($(TARGET_ARCH),arm)
  421. # No longer needed with current toolchains, but leave it here for now.
  422. # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
  423. # LDADD_LIBFLOAT=-lfloat
  424. endif
  425. endif
  426. # Please let us see private headers' parts
  427. CFLAGS += -DUCLIBC_INTERNAL
  428. # We need this to be checked within libc-symbols.h
  429. ifneq ($(HAVE_SHARED),y)
  430. CFLAGS += -DSTATIC
  431. endif
  432. CFLAGS += $(call check_gcc,-std=gnu99,)
  433. LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -Wl,-shared \
  434. -Wl,--warn-common -Wl,--warn-once -Wl,-z,combreloc
  435. # binutils-2.16.1 warns about ignored sections, 2.16.91.0.3 and newer are ok
  436. #LDFLAGS_NOSTRIP+=$(call check_ld,--gc-sections)
  437. ifeq ($(UCLIBC_BUILD_RELRO),y)
  438. LDFLAGS_NOSTRIP+=-Wl,-z,relro
  439. endif
  440. ifeq ($(UCLIBC_BUILD_NOW),y)
  441. LDFLAGS_NOSTRIP+=-Wl,-z,now
  442. endif
  443. ifeq ($(LDSO_GNU_HASH_SUPPORT),y)
  444. # Be sure that binutils support it
  445. LDFLAGS_GNUHASH:=$(call check_ld,--hash-style=gnu)
  446. ifeq ($(LDFLAGS_GNUHASH),)
  447. $(error Your binutils don't support --hash-style option, while you want to use it)
  448. else
  449. LDFLAGS_NOSTRIP += -Wl,$(LDFLAGS_GNUHASH)
  450. endif
  451. endif
  452. LDFLAGS:=$(LDFLAGS_NOSTRIP) -Wl,-z,defs
  453. ifeq ($(DODEBUG),y)
  454. #CFLAGS += -g3
  455. CFLAGS += -O0 -g3
  456. else
  457. CFLAGS += $(OPTIMIZATION) $(XARCH_CFLAGS)
  458. endif
  459. ifeq ($(DOSTRIP),y)
  460. LDFLAGS += -Wl,-s
  461. else
  462. STRIPTOOL := true -Stripping_disabled
  463. endif
  464. ifeq ($(DOMULTI),y)
  465. # we try to compile all sources at once into an object (IMA), but
  466. # gcc-3.3.x does not support it
  467. # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources
  468. # gcc-4.0.x supports it, supports the --combine flag, but does not need it
  469. # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless
  470. ifeq ($(GCC_MAJOR_VER),3)
  471. DOMULTI:=n
  472. else
  473. CFLAGS+=$(call check_gcc,--combine,)
  474. endif
  475. else
  476. DOMULTI:=n
  477. endif
  478. ifneq ($(strip $(UCLIBC_EXTRA_LDFLAGS)),"")
  479. LDFLAGS += $(subst ",, $(UCLIBC_EXTRA_LDFLAGS))
  480. endif
  481. ifeq ($(UCLIBC_HAS_THREADS),y)
  482. ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
  483. PTNAME := nptl
  484. else
  485. ifeq ($(LINUXTHREADS_OLD),y)
  486. PTNAME := linuxthreads.old
  487. else
  488. PTNAME := linuxthreads
  489. endif
  490. endif
  491. PTDIR := $(top_builddir)libpthread/$(PTNAME)
  492. # set up system dependencies include dirs (NOTE: order matters!)
  493. ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
  494. PTINC:= -I$(PTDIR) \
  495. -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
  496. -I$(PTDIR)/sysdeps/$(TARGET_ARCH) \
  497. -I$(PTDIR)/sysdeps/unix/sysv/linux \
  498. -I$(PTDIR)/sysdeps/pthread \
  499. -I$(PTDIR)/sysdeps/pthread/bits \
  500. -I$(PTDIR)/sysdeps/generic \
  501. -I$(top_srcdir)ldso/ldso/$(TARGET_ARCH) \
  502. -I$(top_srcdir)ldso/include
  503. #
  504. # Test for TLS if NPTL support was selected.
  505. #
  506. GCC_HAS_TLS=$(shell \
  507. echo "extern __thread int foo;" | $(CC) -o /dev/null -S -xc - 2>&1)
  508. ifneq ($(GCC_HAS_TLS),)
  509. gcc_tls_test_fail:
  510. @echo "####";
  511. @echo "#### Your compiler does not support TLS and you are trying to build uClibc";
  512. @echo "#### with NPTL support. Upgrade your binutils and gcc to versions which";
  513. @echo "#### support TLS for your architecture. Do not contact uClibc maintainers";
  514. @echo "#### about this problem.";
  515. @echo "####";
  516. @echo "#### Exiting...";
  517. @echo "####";
  518. @exit 1;
  519. endif
  520. else
  521. PTINC := \
  522. -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
  523. -I$(PTDIR)/sysdeps/$(TARGET_ARCH) \
  524. -I$(PTDIR)/sysdeps/unix/sysv/linux \
  525. -I$(PTDIR)/sysdeps/pthread \
  526. -I$(PTDIR) \
  527. -I$(top_builddir)libpthread
  528. endif
  529. CFLAGS+=$(PTINC)
  530. else
  531. PTNAME :=
  532. PTINC :=
  533. endif
  534. CFLAGS += -I$(KERNEL_HEADERS)
  535. #CFLAGS += -iwithprefix include-fixed -iwithprefix include
  536. CC_IPREFIX:=$(shell $(CC) --print-file-name=include)
  537. CFLAGS += -I$(dir $(CC_IPREFIX))/include-fixed -I$(CC_IPREFIX)
  538. ifneq ($(DOASSERTS),y)
  539. CFLAGS+=-DNDEBUG
  540. endif
  541. ifeq ($(SYMBOL_PREFIX),_)
  542. CFLAGS+=-D__UCLIBC_UNDERSCORES__
  543. endif
  544. # Keep the check_as from being needlessly executed
  545. ifndef ASFLAGS_NOEXEC
  546. ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
  547. export ASFLAGS_NOEXEC := $(call check_as,--noexecstack)
  548. else
  549. export ASFLAGS_NOEXEC :=
  550. endif
  551. endif
  552. ASFLAGS = $(ASFLAGS_NOEXEC)
  553. LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
  554. LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
  555. LIBGCC_DIR:=$(dir $(LIBGCC))
  556. # moved from libpthread/linuxthreads
  557. ifeq ($(UCLIBC_CTOR_DTOR),y)
  558. SHARED_START_FILES:=$(top_builddir)lib/crti.o $(LIBGCC_DIR)crtbeginS.o
  559. SHARED_END_FILES:=$(LIBGCC_DIR)crtendS.o $(top_builddir)lib/crtn.o
  560. endif