Rules.mak 14 KB

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  1. # Rules.make for uClibc
  2. #
  3. # Copyright (C) 2000 by Lineo, inc.
  4. # Copyright (C) 2000-2002 Erik Andersen <andersen@uclibc.org>
  5. #
  6. # This program is free software; you can redistribute it and/or modify it under
  7. # the terms of the GNU Library General Public License as published by the Free
  8. # Software Foundation; either version 2 of the License, or (at your option) any
  9. # later version.
  10. #
  11. # This program is distributed in the hope that it will be useful, but WITHOUT
  12. # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
  13. # FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more
  14. # details.
  15. #
  16. # You should have received a copy of the GNU Library General Public License
  17. # along with this program; if not, write to the Free Software Foundation, Inc.,
  18. # 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  19. #-----------------------------------------------------------
  20. # This file contains rules which are shared between multiple
  21. # Makefiles. All normal configuration options live in the
  22. # file named ".config". Don't mess with this file unless
  23. # you know what you are doing.
  24. #-----------------------------------------------------------
  25. # If you are running a cross compiler, you will want to set
  26. # 'CROSS' to something more interesting ... Target
  27. # architecture is determined by asking the CC compiler what
  28. # arch it compiles things for, so unless your compiler is
  29. # broken, you should not need to specify TARGET_ARCH.
  30. #
  31. # Most people will set this stuff on the command line, i.e.
  32. # make CROSS=arm-linux-
  33. # will build uClibc for 'arm'.
  34. ifndef CROSS
  35. CROSS=
  36. endif
  37. CC = $(CROSS)gcc
  38. AR = $(CROSS)ar
  39. LD = $(CROSS)ld
  40. NM = $(CROSS)nm
  41. STRIPTOOL = $(CROSS)strip
  42. INSTALL = install
  43. LN = ln
  44. RM = rm -f
  45. # Select the compiler needed to build binaries for your development system
  46. HOSTCC = gcc
  47. HOSTCFLAGS = -O2 -Wall
  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. MAJOR_VERSION := 0
  53. MINOR_VERSION := 9
  54. SUBLEVEL := 28
  55. VERSION := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
  56. # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
  57. LC_ALL := C
  58. export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION LC_ALL
  59. SHARED_MAJORNAME:=libc.so.$(MAJOR_VERSION)
  60. UCLIBC_LDSO:=ld-uClibc.so.$(MAJOR_VERSION)
  61. NONSHARED_LIBNAME:=uclibc_nonshared.a
  62. # Make sure DESTDIR and PREFIX can be used to install
  63. # PREFIX is a uClibcism while DESTDIR is a common GNUism
  64. ifndef PREFIX
  65. PREFIX = $(DESTDIR)
  66. endif
  67. # Pull in the user's uClibc configuration
  68. ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
  69. -include $(TOPDIR).config
  70. endif
  71. ifndef CROSS
  72. CROSS=$(subst ",, $(strip $(CROSS_COMPILER_PREFIX)))
  73. endif
  74. # A nifty macro to make testing gcc features easier
  75. check_gcc=$(shell \
  76. if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
  77. then echo "$(1)"; else echo "$(2)"; fi)
  78. check_as=$(shell \
  79. if $(CC) -Wa,$(1) -Wa,-Z -c -o /dev/null -xassembler /dev/null > /dev/null 2>&1; \
  80. then echo "-Wa,$(1)"; fi)
  81. # Setup some shortcuts so that silent mode is silent like it should be
  82. ifeq ($(subst s,,$(MAKEFLAGS)),$(MAKEFLAGS))
  83. export MAKE_IS_SILENT=n
  84. SECHO=@echo
  85. SHELL_SET_X=set -x
  86. else
  87. export MAKE_IS_SILENT=y
  88. SECHO=-@false
  89. SHELL_SET_X=set +x
  90. endif
  91. # Make certain these contain a final "/", but no "//"s.
  92. TARGET_ARCH:=$(shell grep -s ^TARGET_ARCH $(TOPDIR)/.config | sed -e 's/^TARGET_ARCH=//' -e 's/"//g')
  93. RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(RUNTIME_PREFIX))))))
  94. DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(DEVEL_PREFIX))))))
  95. KERNEL_SOURCE:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(KERNEL_SOURCE))))))
  96. export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_SOURCE
  97. ARFLAGS:=cr
  98. OPTIMIZATION:=
  99. PICFLAG:=-fPIC
  100. PIEFLAG_NAME:=-fPIE
  101. # Some nice CPU specific optimizations
  102. ifeq ($(strip $(TARGET_ARCH)),i386)
  103. OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
  104. OPTIMIZATION+=$(call check_gcc,-falign-jumps=0 -falign-loops=0,-malign-jumps=0 -malign-loops=0)
  105. CPU_CFLAGS-$(CONFIG_386)+=-march=i386
  106. CPU_CFLAGS-$(CONFIG_486)+=-march=i486
  107. CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
  108. CPU_CFLAGS-$(CONFIG_586)+=-march=i586
  109. CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
  110. CPU_CFLAGS-$(CONFIG_686)+=-march=i686
  111. CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
  112. CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
  113. CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
  114. CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
  115. CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-march=i686) $(call check_gcc,-falign-functions=4,-malign-functions=4)
  116. CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686 $(call check_gcc,-falign-functions=0,-malign-functions=0)
  117. CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
  118. CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
  119. CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486) $(call check_gcc,-falign-functions=0,-malign-functions=0)
  120. CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
  121. endif
  122. ifeq ($(strip $(TARGET_ARCH)),sparc)
  123. CPU_CFLAGS-$(CONFIG_SPARC_V7)+=-mcpu=v7
  124. CPU_CFLAGS-$(CONFIG_SPARC_V8)+=-mcpu=v8
  125. CPU_CFLAGS-$(CONFIG_SPARC_V9)+=-mcpu=v9
  126. CPU_CFLAGS-$(CONFIG_SPARC_V9B)+=$(call check_gcc,-mcpu=v9b,-mcpu=ultrasparc)
  127. endif
  128. ifeq ($(strip $(TARGET_ARCH)),arm)
  129. OPTIMIZATION+=-fstrict-aliasing
  130. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
  131. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
  132. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
  133. CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
  134. CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
  135. CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
  136. CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
  137. CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4
  138. CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4
  139. CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4
  140. CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv5
  141. CPU_CFLAGS-$(CONFIG_ARM1136JF_S)+=-mtune=arm1136jf-s -march=armv6
  142. CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
  143. CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
  144. CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
  145. CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv4 -Wa,-mcpu=xscale
  146. endif
  147. ifeq ($(strip $(TARGET_ARCH)),mips)
  148. CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
  149. CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
  150. CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
  151. CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
  152. CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
  153. CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
  154. endif
  155. ifeq ($(strip $(TARGET_ARCH)),sh)
  156. OPTIMIZATION+=-fstrict-aliasing
  157. OPTIMIZATION+= $(call check_gcc,-mprefergot,)
  158. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
  159. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
  160. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
  161. CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
  162. CPU_CFLAGS-$(CONFIG_SH2)+=-m2
  163. CPU_CFLAGS-$(CONFIG_SH3)+=-m3
  164. ifeq ($(UCLIBC_HAS_FLOATS),y)
  165. CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
  166. CPU_CFLAGS-$(CONFIG_SH4)+=-m4
  167. else
  168. CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
  169. CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
  170. endif
  171. endif
  172. ifeq ($(strip $(TARGET_ARCH)),sh64)
  173. OPTIMIZATION+=-fstrict-aliasing
  174. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):=-EL
  175. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):=-EB
  176. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
  177. CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
  178. CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
  179. endif
  180. ifeq ($(strip $(TARGET_ARCH)),h8300)
  181. CPU_LDFLAGS-$(CONFIG_H8300H)+= -ms8300h
  182. CPU_LDFLAGS-$(CONFIG_H8S) += -ms8300s
  183. CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32 -fsigned-char
  184. CPU_CFLAGS-$(CONFIG_H8S) += -ms -mint32 -fsigned-char
  185. endif
  186. ifeq ($(strip $(TARGET_ARCH)),cris)
  187. CPU_LDFLAGS-$(CONFIG_CRIS)+=-mcrislinux
  188. CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
  189. PICFLAG:=-fpic
  190. PIEFLAG_NAME:=-fpie
  191. endif
  192. ifeq ($(strip $(TARGET_ARCH)),powerpc)
  193. # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
  194. # enough. Therefore use -fpic which will reduce code size and generates
  195. # faster code.
  196. PICFLAG:=-fpic
  197. PIEFLAG_NAME:=-fpie
  198. endif
  199. ifeq ($(strip $(TARGET_ARCH)),frv)
  200. CPU_LDFLAGS-$(CONFIG_FRV)+=-melf32frvfd
  201. CPU_CFLAGS-$(CONFIG_FRV)+=-mfdpic
  202. # Using -pie causes the program to have an interpreter, which is
  203. # forbidden, so we must make do with -shared. Unfortunately,
  204. # -shared by itself would get us global function descriptors
  205. # and calls through PLTs, dynamic resolution of symbols, etc,
  206. # which would break as well, but -Bsymbolic comes to the rescue.
  207. export LDPIEFLAG:=-shared -Bsymbolic
  208. UCLIBC_LDSO=ld.so.1
  209. endif
  210. # Keep the check_gcc from being needlessly executed
  211. ifndef PIEFLAG
  212. ifneq ($(UCLIBC_BUILD_PIE),y)
  213. export PIEFLAG:=
  214. else
  215. export PIEFLAG:=$(call check_gcc,$(PIEFLAG_NAME),$(PICFLAG))
  216. endif
  217. endif
  218. # We need to keep track of both the CC PIE flag (above) as
  219. # well as the LD PIE flag (below) because we can't rely on
  220. # gcc passing -pie if we used -fPIE
  221. ifndef LDPIEFLAG
  222. ifneq ($(UCLIBC_BUILD_PIE),y)
  223. export LDPIEFLAG:=
  224. else
  225. export LDPIEFLAG:=$(shell $(LD) --help | grep -q pie && echo "-Wl,-pie")
  226. endif
  227. endif
  228. # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
  229. ifndef ASNEEDED
  230. ifneq ($(UCLIBC_HAS_SSP),y)
  231. export ASNEEDED:=
  232. else
  233. export ASNEEDED:=$(shell (LD_TMP=$(mktemp LD_XXXXXX) ; echo "GROUP ( AS_NEEDED ( /usr/lib/libc.so ) )" > $LD_TMP && if $(LD) -T $LD_TMP -o /dev/null > /dev/null 2>&1; then echo "AS_NEEDED ( $(UCLIBC_LDSO) )"; else echo "$(UCLIBC_LDSO)"; fi; rm -f $LD_TMP ) )
  234. endif
  235. endif
  236. # Use '-Os' optimization if available, else use -O2, allow Config to override
  237. OPTIMIZATION+=$(call check_gcc,-Os,-O2)
  238. # Use the gcc 3.4 -funit-at-a-time optimization when available
  239. OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
  240. # Add a bunch of extra pedantic annoyingly strict checks
  241. XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing
  242. XARCH_CFLAGS=$(subst ",, $(strip $(ARCH_CFLAGS)))
  243. CPU_CFLAGS=$(subst ",, $(strip $(CPU_CFLAGS-y)))
  244. LDADD_LIBFLOAT=
  245. ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
  246. # Add -msoft-float to the CPU_FLAGS since ldso and libdl ignore CFLAGS.
  247. # If -msoft-float isn't supported, we want an error anyway.
  248. # Hmm... might need to revisit this for arm since it has 2 different
  249. # soft float encodings.
  250. CPU_CFLAGS += -msoft-float
  251. ifeq ($(strip $(TARGET_ARCH)),arm)
  252. # No longer needed with current toolchains, but leave it here for now.
  253. # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
  254. # LDADD_LIBFLOAT=-lfloat
  255. endif
  256. endif
  257. SSP_DISABLE_FLAGS?=$(call check_gcc,-fno-stack-protector,)
  258. ifeq ($(UCLIBC_BUILD_SSP),y)
  259. SSP_CFLAGS:=$(call check_gcc,-fno-stack-protector-all,)
  260. SSP_CFLAGS+=$(call check_gcc,-fstack-protector,)
  261. SSP_ALL_CFLAGS?=$(call check_gcc,-fstack-protector-all,)
  262. else
  263. SSP_CFLAGS:=$(SSP_DISABLE_FLAGS)
  264. endif
  265. # Some nice CFLAGS to work with
  266. CFLAGS:=$(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
  267. -fno-builtin -nostdinc -D_LIBC -I$(TOPDIR)include -I.
  268. LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -shared --warn-common --warn-once -z combreloc -z defs
  269. ifeq ($(DODEBUG),y)
  270. #CFLAGS += -g3
  271. CFLAGS += -O0 -g3
  272. LDFLAGS := $(LDFLAGS_NOSTRIP)
  273. STRIPTOOL:= true -Since_we_are_debugging
  274. else
  275. CFLAGS += $(OPTIMIZATION) $(XARCH_CFLAGS)
  276. LDFLAGS := $(LDFLAGS_NOSTRIP) -s
  277. endif
  278. ifeq ($(DOMULTI),y)
  279. # we try to compile all sources at once into an object (IMA), but
  280. # gcc-3.3.x does not support it
  281. # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources
  282. # gcc-4.0.x supports it, supports the --combine flag, but does not need it
  283. # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless
  284. GCC_VER?=$(shell $(CC) -dumpversion | cut -d . -f 1)
  285. ifeq ($(GCC_VER),3)
  286. DOMULTI:=n
  287. else
  288. CFLAGS+=$(call check_gcc,--combine,)
  289. endif
  290. else
  291. DOMULTI:=n
  292. endif
  293. ifeq ($(UCLIBC_HAS_THREADS),y)
  294. ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
  295. PTNAME := nptl
  296. else
  297. PTNAME := linuxthreads
  298. endif
  299. PTDIR := $(TOPDIR)libpthread/$(PTNAME)
  300. # set up system dependencies include dirs (NOTE: order matters!)
  301. ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
  302. PTINC:= -I$(PTDIR)/compat \
  303. -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
  304. -I$(PTDIR)/sysdeps/$(TARGET_ARCH) \
  305. -I$(PTDIR)/sysdeps/unix/sysv/linux \
  306. -I$(PTDIR)/sysdeps/pthread \
  307. -I$(PTDIR)/sysdeps/pthread/bits \
  308. -I$(PTDIR)/sysdeps/generic \
  309. -include $(PTDIR)/compat/libc-symbols.h
  310. #
  311. # Test for TLS if NPTL support was selected.
  312. #
  313. GCC_HAS_TLS=$(shell \
  314. echo "extern __thread int foo;" | $(CC) -o /dev/null -S -xc - 2>&1)
  315. ifneq ($(GCC_HAS_TLS),)
  316. gcc_tls_test_fail:
  317. @echo "####";
  318. @echo "#### Your compiler does not support TLS and you are trying to build uClibc";
  319. @echo "#### with NPTL support. Upgrade your binutils and gcc to versions which";
  320. @echo "#### support TLS for your architecture. Do not contact uClibc maintainers";
  321. @echo "#### about this problem.";
  322. @echo "####";
  323. @echo "#### Exiting...";
  324. @echo "####";
  325. @exit 1;
  326. endif
  327. else
  328. PTINC:= -I$(PTDIR)/sysdeps/$(TARGET_ARCH) \
  329. -I$(PTDIR)/sysdeps/pthread
  330. endif
  331. CFLAGS+=$(PTINC)
  332. endif
  333. ifeq ($(UCLIBC_BUILD_RELRO),y)
  334. LDFLAGS+=-z relro
  335. endif
  336. ifeq ($(UCLIBC_BUILD_NOW),y)
  337. LDFLAGS+=-z now
  338. endif
  339. # Sigh, some stupid versions of gcc can't seem to cope with '-iwithprefix include'
  340. #CFLAGS+=-iwithprefix include
  341. CFLAGS+=-isystem $(shell $(CC) -print-file-name=include)
  342. ifneq ($(DOASSERTS),y)
  343. CFLAGS+=-DNDEBUG
  344. endif
  345. ifeq ($(DOPIC),y)
  346. CFLAGS+=$(PICFLAG)
  347. endif
  348. # Keep the check_as from being needlessly executed
  349. ASFLAGS = $(CFLAGS)
  350. ifndef ASFLAGS_NOEXEC
  351. ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
  352. export ASFLAGS_NOEXEC := $(call check_as,--noexecstack)
  353. else
  354. export ASFLAGS_NOEXEC :=
  355. endif
  356. endif
  357. ASFLAGS += $(ASFLAGS_NOEXEC)
  358. LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
  359. LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
  360. LIBGCC_DIR:=$(dir $(LIBGCC))
  361. ########################################
  362. #
  363. # uClinux shared lib support
  364. #
  365. ifeq ($(CONFIG_BINFMT_SHARED_FLAT),y)
  366. # For the shared version of this, we specify no stack and its library ID
  367. FLTFLAGS += -s 0
  368. LIBID=1
  369. export LIBID FLTFLAGS
  370. SHARED_TARGET = lib/libc
  371. endif
  372. TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH))))