Rules.mak 27 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_COMPILE' 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_COMPILE=arm-linux-
  34. # will build uClibc for 'arm'.
  35. # CROSS is still supported for backward compatibily only
  36. CROSS_COMPILE ?= $(CROSS)
  37. CC = $(CROSS_COMPILE)gcc
  38. AR = $(CROSS_COMPILE)ar
  39. LD = $(CROSS_COMPILE)ld
  40. NM = $(CROSS_COMPILE)nm
  41. OBJDUMP = $(CROSS_COMPILE)objdump
  42. STRIPTOOL = $(CROSS_COMPILE)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
  52. # Select the compiler needed to build binaries for your development system
  53. HOSTCC = gcc
  54. BUILD_CFLAGS = -Os -Wall
  55. #---------------------------------------------------------
  56. # Nothing beyond this point should ever be touched by mere
  57. # mortals. Unless you hang out with the gods, you should
  58. # probably leave all this stuff alone.
  59. # strip quotes
  60. qstrip = $(strip $(subst ",,$(1)))
  61. #"))
  62. ifndef KCONFIG_CONFIG
  63. KCONFIG_CONFIG := $(top_builddir).config
  64. endif
  65. export KCONFIG_CONFIG
  66. # Pull in the user's uClibc configuration
  67. ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
  68. # Prevent make from searching
  69. __ABS_KCONFIG_CONFIG := $(abspath $(KCONFIG_CONFIG))
  70. -include $(__ABS_KCONFIG_CONFIG)
  71. endif
  72. TARGET_ARCH:=$(call qstrip,$(TARGET_ARCH))
  73. ifeq ($(TARGET_ARCH),)
  74. ARCH ?= $(shell uname -m | $(SED) -e s/i.86/i386/ \
  75. -e s/sun.*/sparc/ -e s/sparc.*/sparc/ \
  76. -e s/arm.*/arm/ -e s/sa110/arm/ \
  77. -e s/sh.*/sh/ \
  78. -e s/s390x/s390/ -e s/parisc.*/hppa/ \
  79. -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
  80. -e s/xtensa.*/xtensa/ )
  81. else
  82. ARCH = $(TARGET_ARCH)
  83. endif
  84. export ARCH
  85. # Make certain these contain a final "/", but no "//"s.
  86. scrub_path = $(strip $(subst //,/, $(subst ,/, $(call qstrip,$(1)))))
  87. TARGET_SUBARCH := $(call qstrip,$(TARGET_SUBARCH))
  88. RUNTIME_PREFIX := $(call scrub_path,$(RUNTIME_PREFIX))
  89. DEVEL_PREFIX := $(call scrub_path,$(DEVEL_PREFIX))
  90. MULTILIB_DIR := $(call scrub_path,$(MULTILIB_DIR))
  91. KERNEL_HEADERS := $(call scrub_path,$(KERNEL_HEADERS))
  92. export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_HEADERS MULTILIB_DIR
  93. # Now config hard core
  94. MAJOR_VERSION := 0
  95. MINOR_VERSION := 9
  96. SUBLEVEL := 34
  97. EXTRAVERSION :=-git
  98. VERSION := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
  99. ABI_VERSION := $(MAJOR_VERSION)
  100. ifneq ($(EXTRAVERSION),)
  101. VERSION := $(VERSION)$(EXTRAVERSION)
  102. endif
  103. # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
  104. LC_ALL := C
  105. export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION ABI_VERSION LC_ALL
  106. LIBC := libc
  107. SHARED_LIBNAME := $(LIBC).so.$(ABI_VERSION)
  108. UBACKTRACE_DSO := libubacktrace.so.$(ABI_VERSION)
  109. ifneq ($(findstring $(TARGET_ARCH) , hppa64 ia64 mips64 powerpc64 s390x sparc64 x86_64 ),)
  110. UCLIBC_LDSO_NAME := ld64-uClibc
  111. ARCH_NATIVE_BIT := 64
  112. else
  113. UCLIBC_LDSO_NAME := ld-uClibc
  114. ARCH_NATIVE_BIT := 32
  115. endif
  116. UCLIBC_LDSO := $(UCLIBC_LDSO_NAME).so.$(ABI_VERSION)
  117. NONSHARED_LIBNAME := uclibc_nonshared.a
  118. libc := $(top_builddir)lib/$(SHARED_LIBNAME)
  119. libc.depend := $(top_builddir)lib/$(SHARED_LIBNAME:.$(ABI_VERSION)=)
  120. ifneq ($(ARCH_HAS_NO_SHARED),y)
  121. libdl.depend := $(top_builddir)lib/libdl.so
  122. endif
  123. ifneq ($(HAS_NO_THREADS),y)
  124. libpthread.depend := $(top_builddir)lib/libpthread.so
  125. endif
  126. interp := $(top_builddir)lib/interp.os
  127. ldso := $(top_builddir)lib/$(UCLIBC_LDSO)
  128. headers_dep := $(top_builddir)include/bits/sysnum.h
  129. sub_headers := $(headers_dep)
  130. #LIBS :=$(interp) -L$(top_builddir)lib -lc
  131. LIBS := $(interp) -L$(top_builddir)lib $(libc:.$(ABI_VERSION)=)
  132. # Make sure DESTDIR and PREFIX can be used to install
  133. # PREFIX is a uClibcism while DESTDIR is a common GNUism
  134. ifndef PREFIX
  135. PREFIX = $(DESTDIR)
  136. endif
  137. ifneq ($(HAVE_SHARED),y)
  138. libc :=
  139. interp :=
  140. ldso :=
  141. endif
  142. comma:=,
  143. space:= #
  144. ifeq ($(CROSS_COMPILE),)
  145. CROSS_COMPILE=$(call qstrip,$(CROSS_COMPILER_PREFIX))
  146. endif
  147. # A nifty macro to make testing gcc features easier
  148. check_gcc=$(shell \
  149. if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
  150. then echo "$(1)"; else echo "$(2)"; fi)
  151. check_as=$(shell \
  152. if $(CC) -Wa,$(1) -Wa,-Z -c -o /dev/null -xassembler /dev/null > /dev/null 2>&1; \
  153. then echo "-Wa,$(1)"; fi)
  154. check_ld=$(shell \
  155. if $(LD) $(1) -o /dev/null -b binary /dev/null > /dev/null 2>&1; \
  156. then echo "$(1)"; fi)
  157. # Use variable indirection here so that we can have variable
  158. # names with fun chars in them like equal signs
  159. define check-tool-var
  160. ifeq ($(filter $(clean_targets) CLEAN_%,$(MAKECMDGOALS)),)
  161. _v = $(2)_$(3)
  162. ifndef $$(_v)
  163. $$(_v) := $$(call $(1),$(subst %, ,$(3)))
  164. export $$(_v)
  165. endif
  166. endif
  167. endef
  168. # Usage: check-gcc-var,<flag>
  169. # Check the C compiler to see if it supports <flag>.
  170. # Export the variable CFLAG_<flag> if it does.
  171. define check-gcc-var
  172. $(call check-tool-var,check_gcc,CFLAG,$(1))
  173. endef
  174. # Usage: check-as-var,<flag>
  175. # Check the assembler to see if it supports <flag>. Export the
  176. # variable ASFLAG_<flag> if it does (for invoking the assembler),
  177. # as well CFLAG_-Wa<flag> (for invoking the compiler driver).
  178. define check-as-var
  179. $(call check-tool-var,check_as,ASFLAG,$(1))
  180. _v = CFLAG_-Wa$(1)
  181. export $$(_v) = $$(if $$(ASFLAG_$(1)),-Wa$$(comma)$$(ASFLAG_$(1)))
  182. endef
  183. # Usage: check-ld-var,<flag>
  184. # Check the linker to see if it supports <flag>. Export the
  185. # variable LDFLAG_<flag> if it does (for invoking the linker),
  186. # as well CFLAG_-Wl<flag> (for invoking the compiler driver).
  187. define check-ld-var
  188. $(call check-tool-var,check_ld,LDFLAG,$(1))
  189. _v = CFLAG_-Wl$(1)
  190. export $$(_v) = $$(if $$(LDFLAG_$(1)),-Wl$$(comma)$$(LDFLAG_$(1)))
  191. endef
  192. # Usage: cache-output-var,<variable>,<shell command>
  193. # Execute <shell command> and cache the output in <variable>.
  194. define cache-output-var
  195. ifndef $(1)
  196. $(1) := $$(shell $(2))
  197. export $(1)
  198. endif
  199. endef
  200. ARFLAGS:=cr
  201. # Flags in OPTIMIZATION are used only for non-debug builds
  202. OPTIMIZATION:=
  203. # Use '-Os' optimization if available, else use -O2, allow Config to override
  204. $(eval $(call check-gcc-var,-Os))
  205. ifneq ($(CFLAG_-Os),)
  206. OPTIMIZATION += $(CFLAG_-Os)
  207. else
  208. $(eval $(call check-gcc-var,-O2))
  209. OPTIMIZATION += $(CFLAG_-O2)
  210. endif
  211. # Use the gcc 3.4 -funit-at-a-time optimization when available
  212. $(eval $(call check-gcc-var,-funit-at-a-time))
  213. OPTIMIZATION += $(CFLAG_-funit-at-a-time)
  214. # shrinks code by about 0.1%
  215. $(eval $(call check-gcc-var,-fmerge-all-constants))
  216. $(eval $(call check-gcc-var,-fstrict-aliasing))
  217. OPTIMIZATION += $(CFLAG_-fmerge-all-constants) $(CFLAG_-fstrict-aliasing)
  218. $(eval $(call cache-output-var,GCC_VER,$(CC) -dumpversion))
  219. GCC_VER := $(subst ., ,$(GCC_VER))
  220. GCC_MAJOR_VER ?= $(word 1,$(GCC_VER))
  221. #GCC_MINOR_VER ?= $(word 2,$(GCC_VER))
  222. ifeq ($(GCC_MAJOR_VER),4)
  223. # shrinks code, results are from 4.0.2
  224. # 0.36%
  225. $(eval $(call check-gcc-var,-fno-tree-loop-optimize))
  226. OPTIMIZATION += $(CFLAG_-fno-tree-loop-optimize)
  227. # 0.34%
  228. $(eval $(call check-gcc-var,-fno-tree-dominator-opts))
  229. OPTIMIZATION += $(CFLAG_-fno-tree-dominator-opts)
  230. # 0.1%
  231. $(eval $(call check-gcc-var,-fno-strength-reduce))
  232. OPTIMIZATION += $(CFLAG_-fno-strength-reduce)
  233. endif
  234. # CPU_CFLAGS-y contain options which are not warnings,
  235. # not include or library paths, and not optimizations.
  236. # Why -funsigned-char: I hunted a bug related to incorrect
  237. # sign extension of 'char' type for 10 hours straight. Not fun.
  238. CPU_CFLAGS-y := -funsigned-char -fno-builtin
  239. $(eval $(call check-gcc-var,-fno-asm))
  240. CPU_CFLAGS-y += $(CFLAG_-fno-asm)
  241. LDADD_LIBFLOAT=
  242. ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
  243. # If -msoft-float isn't supported, we want an error anyway.
  244. # Hmm... might need to revisit this for arm since it has 2 different
  245. # soft float encodings.
  246. ifneq ($(TARGET_ARCH),nios)
  247. ifneq ($(TARGET_ARCH),nios2)
  248. ifneq ($(TARGET_ARCH),sh)
  249. ifneq ($(TARGET_ARCH),c6x)
  250. CPU_CFLAGS-y += -msoft-float
  251. endif
  252. endif
  253. endif
  254. endif
  255. ifeq ($(TARGET_ARCH),arm)
  256. # No longer needed with current toolchains, but leave it here for now.
  257. # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
  258. # LDADD_LIBFLOAT=-lfloat
  259. endif
  260. endif
  261. $(eval $(call check-gcc-var,-std=gnu99))
  262. CPU_CFLAGS-y += $(CFLAG_-std=gnu99)
  263. CPU_CFLAGS-$(UCLIBC_FORMAT_SHARED_FLAT) += -mid-shared-library
  264. CPU_CFLAGS-$(UCLIBC_FORMAT_FLAT_SEP_DATA) += -msep-data
  265. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN) += -Wl,-EL
  266. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN) += -Wl,-EB
  267. PICFLAG-y := -fPIC
  268. PICFLAG-$(UCLIBC_FORMAT_FDPIC_ELF) := -mfdpic
  269. PICFLAG-$(UCLIBC_FORMAT_DSBT_ELF) := -mdsbt -fpic
  270. PICFLAG := $(PICFLAG-y)
  271. PIEFLAG_NAME:=-fPIE
  272. # Some nice CPU specific optimizations
  273. ifeq ($(TARGET_ARCH),i386)
  274. $(eval $(call check-gcc-var,-fomit-frame-pointer))
  275. OPTIMIZATION += $(CFLAG_-fomit-frame-pointer)
  276. ifeq ($(CONFIG_386)$(CONFIG_486)$(CONFIG_586)$(CONFIG_586MMX),y)
  277. # Non-SSE capable processor.
  278. # NB: this may make SSE insns segfault!
  279. # -O1 -march=pentium3, -Os -msse etc are known to be affected.
  280. # See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685
  281. # -m32 is needed if host is 64-bit
  282. OPTIMIZATION+=$(call check_gcc,-m32 -mpreferred-stack-boundary=2,)
  283. else
  284. $(eval $(call check-gcc-var,-mpreferred-stack-boundary=4))
  285. OPTIMIZATION += $(CFLAG_-mpreferred-stack-boundary=4)
  286. endif
  287. # Choice of alignment (please document why!)
  288. # -falign-labels: in-line labels
  289. # (reachable by normal code flow, aligning will insert nops
  290. # which will be executed - may even make things slower)
  291. # -falign-jumps: reachable only by a jump
  292. # Generic: no alignment at all (smallest code)
  293. GCC_FALIGN=$(call check_gcc,-falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1,-malign-jumps=1 -malign-loops=1)
  294. ifeq ($(CONFIG_K7),y)
  295. # Align functions to four bytes, use default for jumps and loops (why?)
  296. GCC_FALIGN=$(call check_gcc,-falign-functions=4 -falign-labels=1,-malign-functions=4)
  297. endif
  298. ifeq ($(CONFIG_CRUSOE),y)
  299. # Use compiler's default for functions, jumps and loops (why?)
  300. GCC_FALIGN=$(call check_gcc,-falign-functions=0 -falign-labels=1,-malign-functions=0)
  301. endif
  302. ifeq ($(CONFIG_CYRIXIII),y)
  303. # Use compiler's default for functions, jumps and loops (why?)
  304. GCC_FALIGN=$(call check_gcc,-falign-functions=0 -falign-labels=1,-malign-functions=0)
  305. endif
  306. OPTIMIZATION+=$(GCC_FALIGN)
  307. # Putting each function and data object into its own section
  308. # allows for kbytes of less text if users link against static uclibc
  309. # using ld --gc-sections.
  310. # ld 2.18 can't do that (yet?) for shared libraries, so we itself
  311. # do not use --gc-sections at shared lib link time.
  312. # However, in combination with sections being sorted by alignment
  313. # it does result in much reduced padding:
  314. # text data bss dec hex
  315. # 235319 1472 5992 242783 3b45f old.so
  316. # 234104 1472 5980 241556 3af94 new.so
  317. # Without -ffunction-sections, all functions will get aligned
  318. # to 4 byte boundary by as/ld. This is arguably a bug in as.
  319. # It specifies 4 byte align for .text even if not told to do so:
  320. # Idx Name Size VMA LMA File off Algn
  321. # 0 .text xxxxxxxx 00000000 00000000 xxxxxxxx 2**2 <===!
  322. CPU_CFLAGS-y += $(CFLAG_-ffunction-sections) $(CFLAG_-fdata-sections)
  323. CPU_LDFLAGS-y += $(CFLAG_-Wl--sort-common)
  324. $(eval $(call check-ld-var,--sort-section=alignment))
  325. CPU_LDFLAGS-y += $(CFLAG_-Wl--sort-section=alignment)
  326. CPU_LDFLAGS-y+=-m32
  327. CPU_CFLAGS-y+=-m32
  328. CPU_CFLAGS-$(CONFIG_386)+=-march=i386
  329. CPU_CFLAGS-$(CONFIG_486)+=-march=i486
  330. CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
  331. CPU_CFLAGS-$(CONFIG_586)+=-march=i586
  332. CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
  333. CPU_CFLAGS-$(CONFIG_686)+=-march=i686
  334. CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
  335. CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
  336. CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
  337. CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
  338. CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-march=i686)
  339. CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686
  340. CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
  341. CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
  342. CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486)
  343. CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
  344. endif
  345. ifeq ($(TARGET_ARCH),sparc)
  346. CPU_CFLAGS-$(CONFIG_SPARC_V7)+=-mcpu=v7
  347. CPU_CFLAGS-$(CONFIG_SPARC_V8)+=-mcpu=v8
  348. CPU_CFLAGS-$(CONFIG_SPARC_V9)+=-mcpu=v9
  349. CPU_CFLAGS-$(CONFIG_SPARC_V9B)+=$(call check_gcc,-mcpu=v9b,-mcpu=ultrasparc)
  350. endif
  351. ifeq ($(TARGET_ARCH),arm)
  352. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
  353. CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
  354. CPU_CFLAGS-$(COMPILE_IN_THUMB_MODE)+=-mthumb
  355. endif
  356. ifeq ($(TARGET_ARCH),mips)
  357. OPTIMIZATION+=-mno-split-addresses
  358. CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
  359. CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
  360. CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
  361. CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
  362. CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
  363. CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32R2)+=-march=mips32r2 -mtune=mips32r2
  364. CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
  365. ifeq ($(strip $(ARCH_BIG_ENDIAN)),y)
  366. CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64btsmip
  367. CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32btsmip
  368. endif
  369. ifeq ($(strip $(ARCH_LITTLE_ENDIAN)),y)
  370. CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64ltsmip
  371. CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32ltsmip
  372. endif
  373. CPU_CFLAGS-$(CONFIG_MIPS_N64_ABI)+=-mabi=64
  374. CPU_CFLAGS-$(CONFIG_MIPS_O32_ABI)+=-mabi=32
  375. CPU_CFLAGS-$(CONFIG_MIPS_N32_ABI)+=-mabi=n32
  376. endif
  377. ifeq ($(TARGET_ARCH),nios)
  378. OPTIMIZATION+=-funaligned-struct-hack
  379. CPU_LDFLAGS-y+=-Wl,-m32
  380. CPU_CFLAGS-y+=-Wl,-m32
  381. endif
  382. ifeq ($(TARGET_ARCH),sh)
  383. $(eval $(call check-gcc-var,-mprefergot))
  384. OPTIMIZATION += $(CFLAG_-mprefergot)
  385. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
  386. CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
  387. CPU_CFLAGS-$(CONFIG_SH2)+=-m2
  388. CPU_CFLAGS-$(CONFIG_SH3)+=-m3
  389. ifeq ($(UCLIBC_HAS_FPU),y)
  390. CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
  391. CPU_CFLAGS-$(CONFIG_SH4)+=-m4
  392. else
  393. CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
  394. CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
  395. endif
  396. endif
  397. ifeq ($(TARGET_ARCH),sh64)
  398. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
  399. CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
  400. CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
  401. endif
  402. ifeq ($(TARGET_ARCH),h8300)
  403. SYMBOL_PREFIX=_
  404. CPU_LDFLAGS-$(CONFIG_H8300H)+= -Wl,-ms8300h
  405. CPU_LDFLAGS-$(CONFIG_H8S) += -Wl,-ms8300s
  406. CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32
  407. CPU_CFLAGS-$(CONFIG_H8S) += -ms -mint32
  408. endif
  409. ifeq ($(TARGET_ARCH),i960)
  410. OPTIMIZATION+=-mh -mint32 #-fsigned-char
  411. endif
  412. ifeq ($(TARGET_ARCH),e1)
  413. OPTIMIZATION+=-mgnu-param
  414. endif
  415. ifeq ($(TARGET_ARCH),cris)
  416. CPU_LDFLAGS-$(CONFIG_CRIS)+=-Wl,-mcrislinux
  417. CPU_LDFLAGS-$(CONFIG_CRISV32)+=-Wl,-mcrislinux
  418. CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
  419. PICFLAG:=-fpic
  420. PIEFLAG_NAME:=-fpie
  421. endif
  422. ifeq ($(TARGET_ARCH),m68k)
  423. # -fPIC is only supported for 68020 and above. It is not supported
  424. # for 68000, 68010, or Coldfire.
  425. PICFLAG:=-fpic
  426. PIEFLAG_NAME:=-fpie
  427. endif
  428. ifeq ($(TARGET_ARCH),powerpc)
  429. # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
  430. # enough. Therefore use -fpic which will reduce code size and generates
  431. # faster code.
  432. PICFLAG:=-fpic
  433. PIEFLAG_NAME:=-fpie
  434. PPC_HAS_REL16:=$(shell echo -e "\t.text\n\taddis 11,30,_GLOBAL_OFFSET_TABLE_-.@ha" | $(CC) -c -x assembler -o /dev/null - 2> /dev/null && echo -n y || echo -n n)
  435. CPU_CFLAGS-$(PPC_HAS_REL16)+= -DHAVE_ASM_PPC_REL16
  436. CPU_CFLAGS-$(CONFIG_E500) += "-D__NO_MATH_INLINES"
  437. endif
  438. ifeq ($(TARGET_ARCH),bfin)
  439. SYMBOL_PREFIX=_
  440. ifeq ($(UCLIBC_FORMAT_FDPIC_ELF),y)
  441. CPU_CFLAGS-y:=-mfdpic
  442. CPU_LDFLAGS-y += -Wl,-melf32bfinfd
  443. PICFLAG:=-fpic
  444. PIEFLAG_NAME:=-fpie
  445. endif
  446. ifeq ($(UCLIBC_FORMAT_SHARED_FLAT),y)
  447. PICFLAG := -mleaf-id-shared-library
  448. endif
  449. endif
  450. ifeq ($(TARGET_ARCH),frv)
  451. CPU_LDFLAGS-$(CONFIG_FRV)+=-Wl,-melf32frvfd
  452. # Using -pie causes the program to have an interpreter, which is
  453. # forbidden, so we must make do with -shared. Unfortunately,
  454. # -shared by itself would get us global function descriptors
  455. # and calls through PLTs, dynamic resolution of symbols, etc,
  456. # which would break as well, but -Bsymbolic comes to the rescue.
  457. export LDPIEFLAG:=-shared -Wl,-Bsymbolic
  458. UCLIBC_LDSO=ld.so.1
  459. endif
  460. ifeq ($(strip $(TARGET_ARCH)),avr32)
  461. CPU_CFLAGS-$(CONFIG_AVR32_AP7) += -march=ap
  462. CPU_CFLAGS-$(CONFIG_LINKRELAX) += -mrelax
  463. CPU_LDFLAGS-$(CONFIG_LINKRELAX) += --relax
  464. endif
  465. ifeq ($(TARGET_ARCH),i960)
  466. SYMBOL_PREFIX=_
  467. endif
  468. ifeq ($(TARGET_ARCH),v850)
  469. SYMBOL_PREFIX=_
  470. endif
  471. ifeq ($(TARGET_ARCH),c6x)
  472. PIEFLAG:=
  473. CPU_CFLAGS-$(CONFIG_TMS320C64X) += -march=c64x
  474. CPU_CFLAGS-$(CONFIG_TMS320C64XPLUS) += -march=c64x+
  475. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
  476. CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
  477. CPU_LDFLAGS-y += $(CPU_CFLAGS)
  478. endif
  479. $(eval $(call check-gcc-var,$(PIEFLAG_NAME)))
  480. PIEFLAG := $(CFLAG_$(PIEFLAG_NAME))
  481. ifeq ($(PIEFLAG),)
  482. PIEFLAG := $(PICFLAG)
  483. endif
  484. # We need to keep track of both the CC PIE flag (above) as
  485. # well as the LD PIE flag (below) because we can't rely on
  486. # gcc passing -pie if we used -fPIE. We need to directly use -pie
  487. # instead of -Wl,-pie as gcc picks up the wrong startfile/endfile
  488. $(eval $(call cache-output-var,LDPIEFLAG,$(LD) --help 2>/dev/null | grep -q -- -pie && echo "-pie"))
  489. # Check for --as-needed support in linker
  490. ifndef LD_FLAG_ASNEEDED
  491. _LD_FLAG_ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -- --as-needed)
  492. ifneq ($(_LD_FLAG_ASNEEDED),)
  493. export LD_FLAG_ASNEEDED:=--as-needed
  494. endif
  495. endif
  496. ifndef LD_FLAG_NO_ASNEEDED
  497. ifdef LD_FLAG_ASNEEDED
  498. export LD_FLAG_NO_ASNEEDED:=--no-as-needed
  499. endif
  500. endif
  501. ifndef CC_FLAG_ASNEEDED
  502. ifdef LD_FLAG_ASNEEDED
  503. export CC_FLAG_ASNEEDED:=-Wl,$(LD_FLAG_ASNEEDED)
  504. endif
  505. endif
  506. ifndef CC_FLAG_NO_ASNEEDED
  507. ifdef LD_FLAG_NO_ASNEEDED
  508. export CC_FLAG_NO_ASNEEDED:=-Wl,$(LD_FLAG_NO_ASNEEDED)
  509. endif
  510. endif
  511. link.asneeded = $(if $(findstring yy,$(CC_FLAG_ASNEEDED)$(CC_FLAG_NO_ASNEEDED)),$(CC_FLAG_ASNEEDED) $(1) $(CC_FLAG_NO_ASNEEDED))
  512. # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
  513. ifndef ASNEEDED
  514. export ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -q -- --as-needed && echo "AS_NEEDED ( $(UCLIBC_LDSO) )" || echo "$(UCLIBC_LDSO)")
  515. # Only used in installed libc.so linker script
  516. ifeq ($(UCLIBC_HAS_BACKTRACE),y)
  517. ifeq ($(HARDWIRED_ABSPATH),y)
  518. UBACKTRACE_FULL_NAME := $(subst //,/,$(RUNTIME_PREFIX)$(MULTILIB_DIR)/$(UBACKTRACE_DSO))
  519. else
  520. UBACKTRACE_FULL_NAME := $(UBACKTRACE_DSO)
  521. endif
  522. export UBACKTRACE_ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -q -- --as-needed && \
  523. echo "GROUP ( AS_NEEDED ( $(UBACKTRACE_FULL_NAME) ) )" || \
  524. echo "GROUP ( $(UBACKTRACE_FULL_NAME) )")
  525. else
  526. export UBACKTRACE_ASNEEDED:=""
  527. endif
  528. endif
  529. # Add a bunch of extra pedantic annoyingly strict checks
  530. WARNING_FLAGS = -Wstrict-prototypes -Wstrict-aliasing
  531. ifeq ($(EXTRA_WARNINGS),y)
  532. WARNING_FLAGS += \
  533. -Wformat=2 \
  534. -Wmissing-noreturn \
  535. -Wmissing-format-attribute \
  536. -Wmissing-prototypes \
  537. -Wmissing-declarations \
  538. -Wnested-externs \
  539. -Wnonnull \
  540. -Wold-style-declaration \
  541. -Wold-style-definition \
  542. -Wshadow \
  543. -Wundef
  544. # Works only w/ gcc-3.4 and up, can't be checked for gcc-3.x w/ check_gcc()
  545. WARNING_FLAGS-gcc-4 += -Wdeclaration-after-statement
  546. endif
  547. WARNING_FLAGS += $(WARNING_FLAGS-gcc-$(GCC_MAJOR_VER))
  548. $(foreach w,$(WARNING_FLAGS),$(eval $(call check-gcc-var,$(w))))
  549. XWARNINGS = $(call qstrip,$(WARNINGS)) $(foreach w,$(WARNING_FLAGS),$(CFLAG_$(w)))
  550. CPU_CFLAGS=$(call qstrip,$(CPU_CFLAGS-y))
  551. # Save the tested flag in a single variable and force it to be
  552. # evaluated just once. Then use that computed value.
  553. $(eval $(call check-gcc-var,-fno-stack-protector))
  554. SSP_DISABLE_FLAGS ?= $(CFLAG_-fno-stack-protector)
  555. ifeq ($(UCLIBC_BUILD_SSP),y)
  556. $(eval $(call check-gcc-var,-fno-stack-protector-all))
  557. $(eval $(call check-gcc-var,-fstack-protector))
  558. $(eval $(call check-gcc-var,-fstack-protector-all))
  559. SSP_CFLAGS := $(CFLAG_-fno-stack-protector-all)
  560. SSP_CFLAGS += $(CFLAG_-fstack-protector)
  561. SSP_ALL_CFLAGS ?= $(CFLAG_-fstack-protector-all)
  562. else
  563. SSP_CFLAGS := $(SSP_DISABLE_FLAGS)
  564. endif
  565. $(eval $(call check-gcc-var,-nostdlib))
  566. # Collect all CFLAGS components
  567. CFLAGS := $(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
  568. -nostdinc -I$(top_builddir)include \
  569. -I$(top_srcdir)include -include libc-symbols.h \
  570. -I$(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH) \
  571. -I$(top_srcdir)libc/sysdeps/linux \
  572. -I$(top_srcdir)ldso/ldso/$(TARGET_ARCH) \
  573. -I$(top_srcdir)ldso/include -I.
  574. ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS)),"")
  575. CFLAGS += $(call qstrip,$(UCLIBC_EXTRA_CFLAGS))
  576. endif
  577. # We need this to be checked within libc-symbols.h
  578. ifneq ($(HAVE_SHARED),y)
  579. CFLAGS += -DSTATIC
  580. endif
  581. $(eval $(call check-ld-var,--warn-once))
  582. $(eval $(call check-ld-var,--sort-common))
  583. $(eval $(call check-ld-var,--discard-all))
  584. LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -shared \
  585. -Wl,--warn-common $(CFLAG_-Wl--warn-once) -Wl,-z,combreloc
  586. # binutils-2.16.1 warns about ignored sections, 2.16.91.0.3 and newer are ok
  587. #$(eval $(call check-ld-var,--gc-sections))
  588. #LDFLAGS_NOSTRIP += $(LDFLAG_--gc-sections)
  589. $(eval $(call check-gcc-var,-fdata-sections))
  590. $(eval $(call check-gcc-var,-ffunction-sections))
  591. ifeq ($(UCLIBC_BUILD_RELRO),y)
  592. LDFLAGS_NOSTRIP+=-Wl,-z,relro
  593. endif
  594. ifeq ($(UCLIBC_BUILD_NOW),y)
  595. LDFLAGS_NOSTRIP+=-Wl,-z,now
  596. endif
  597. ifeq ($(LDSO_GNU_HASH_SUPPORT),y)
  598. # Be sure that binutils support it
  599. $(eval $(call check-ld-var,--hash-style=gnu))
  600. ifeq ($(LDFLAG_--hash-style=gnu),)
  601. ifneq ($(filter-out $(clean_targets) CLEAN_% install_headers headers-y,$(MAKECMDGOALS)),)
  602. $(error Your binutils do not support --hash-style option, while you want to use it)
  603. endif
  604. else
  605. LDFLAGS_NOSTRIP += $(CFLAG_-Wl--hash-style=gnu)
  606. endif
  607. endif
  608. LDFLAGS:=$(LDFLAGS_NOSTRIP) -Wl,-z,defs
  609. ifeq ($(DODEBUG),y)
  610. CFLAGS += -O0 -g3 -DDEBUG
  611. else
  612. CFLAGS += $(OPTIMIZATION)
  613. endif
  614. ifeq ($(DOSTRIP),y)
  615. LDFLAGS += -Wl,-s
  616. else
  617. STRIPTOOL := true -Stripping_disabled
  618. endif
  619. ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS)),"")
  620. CFLAGS += $(call qstrip,$(UCLIBC_EXTRA_CFLAGS))
  621. endif
  622. ifeq ($(DOMULTI),y)
  623. # we try to compile all sources at once into an object (IMA), but
  624. # gcc-3.3.x does not support it
  625. # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources
  626. # gcc-4.0.x supports it, supports the --combine flag, but does not need it
  627. # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless
  628. ifeq ($(GCC_MAJOR_VER),3)
  629. DOMULTI:=n
  630. else
  631. $(eval $(call check-gcc-var,--combine))
  632. CFLAGS += $(CFLAG_--combine)
  633. endif
  634. else
  635. DOMULTI:=n
  636. endif
  637. ifneq ($(strip $(UCLIBC_EXTRA_LDFLAGS)),"")
  638. LDFLAGS += $(call qstrip,$(UCLIBC_EXTRA_LDFLAGS))
  639. endif
  640. ifeq ($(UCLIBC_HAS_THREADS),y)
  641. ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
  642. PTNAME := nptl
  643. CFLAGS += -DHAVE_FORCED_UNWIND
  644. else
  645. ifeq ($(LINUXTHREADS_OLD),y)
  646. PTNAME := linuxthreads.old
  647. else
  648. PTNAME := linuxthreads
  649. endif
  650. endif
  651. PTDIR := libpthread/$(PTNAME)
  652. # set up system dependencies include dirs (NOTE: order matters!)
  653. ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
  654. PTINC:= -I$(top_builddir)$(PTDIR) \
  655. -I$(top_srcdir)$(PTDIR) \
  656. $(if $(TARGET_SUBARCH),-I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH)/$(TARGET_SUBARCH)) \
  657. -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
  658. -I$(top_builddir)$(PTDIR)/sysdeps/$(TARGET_ARCH) \
  659. -I$(top_srcdir)$(PTDIR)/sysdeps/$(TARGET_ARCH) \
  660. -I$(top_builddir)$(PTDIR)/sysdeps/unix/sysv/linux \
  661. -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux \
  662. -I$(top_srcdir)$(PTDIR)/sysdeps/pthread \
  663. -I$(top_srcdir)$(PTDIR)/sysdeps/pthread/bits \
  664. -I$(top_srcdir)$(PTDIR)/sysdeps/generic
  665. #
  666. # Test for TLS if NPTL support was selected.
  667. #
  668. GCC_HAS_TLS=$(shell \
  669. echo "extern __thread int foo;" | $(CC) -o /dev/null -S -xc - 2>&1)
  670. ifneq ($(GCC_HAS_TLS),)
  671. gcc_tls_test_fail:
  672. @echo "####";
  673. @echo "#### Your compiler does not support TLS and you are trying to build uClibc";
  674. @echo "#### with NPTL support. Upgrade your binutils and gcc to versions which";
  675. @echo "#### support TLS for your architecture. Do not contact uClibc maintainers";
  676. @echo "#### about this problem.";
  677. @echo "####";
  678. @echo "#### Exiting...";
  679. @echo "####";
  680. @exit 1;
  681. endif
  682. else
  683. PTINC := \
  684. -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
  685. -I$(top_srcdir)$(PTDIR)/sysdeps/$(TARGET_ARCH) \
  686. -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux \
  687. -I$(top_srcdir)$(PTDIR)/sysdeps/pthread \
  688. -I$(top_srcdir)$(PTDIR) \
  689. -I$(top_srcdir)libpthread
  690. endif
  691. CFLAGS+=$(PTINC)
  692. else
  693. PTNAME :=
  694. PTINC :=
  695. endif
  696. CFLAGS += -I$(top_srcdir)libc/sysdeps/linux/common
  697. #CFLAGS += -iwithprefix include-fixed -iwithprefix include
  698. $(eval $(call cache-output-var,CC_IPREFIX,$(CC) -print-file-name=include))
  699. CC_INC := -isystem $(dir $(CC_IPREFIX))include-fixed -isystem $(CC_IPREFIX)
  700. CFLAGS += $(CC_INC)
  701. CFLAGS += -I$(KERNEL_HEADERS)
  702. ifneq ($(DOASSERTS),y)
  703. CFLAGS+=-DNDEBUG
  704. endif
  705. ifeq ($(SYMBOL_PREFIX),_)
  706. CFLAGS+=-D__UCLIBC_UNDERSCORES__
  707. endif
  708. # Keep the check_as from being needlessly executed
  709. ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
  710. $(eval $(call check-as-var,--noexecstack))
  711. endif
  712. ASFLAGS = $(ASFLAG_--noexecstack)
  713. LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
  714. $(eval $(call cache-output-var,LIBGCC,$(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name))
  715. $(eval $(call cache-output-var,LIBGCC_EH,$(CC) $(LIBGCC_CFLAGS) -print-file-name=libgcc_eh.a))
  716. # with -O0 we (e.g. lockf) might end up with references to
  717. # _Unwind_Resume, so pull in gcc_eh in this case..
  718. LIBGCC += $(if $(DODEBUG),$(LIBGCC_EH))
  719. LIBGCC_DIR:=$(dir $(LIBGCC))
  720. # moved from libpthread/linuxthreads
  721. ifeq ($(UCLIBC_CTOR_DTOR),y)
  722. SHARED_START_FILES:=$(top_builddir)lib/crti.o $(LIBGCC_DIR)crtbeginS.o
  723. SHARED_END_FILES:=$(LIBGCC_DIR)crtendS.o $(top_builddir)lib/crtn.o
  724. endif
  725. LOCAL_INSTALL_PATH := install_dir
  726. PTHREAD_GENERATE_MANGLE ?= -n "s/^.*@@@name@@@\([^@]*\)@@@value@@@[^0-9Xxa-fA-F-]*\([0-9Xxa-fA-F-][0-9Xxa-fA-F-]*\).*@@@end@@@.*\$$/\#define \1 \2/p"