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. STRIP_FLAGS ?= -x -R .note -R .comment
  46. # Select the compiler needed to build binaries for your development system
  47. HOSTCC = gcc
  48. HOSTCFLAGS = -O2 -Wall
  49. #---------------------------------------------------------
  50. # Nothing beyond this point should ever be touched by mere
  51. # mortals. Unless you hang out with the gods, you should
  52. # probably leave all this stuff alone.
  53. MAJOR_VERSION := 0
  54. MINOR_VERSION := 9
  55. SUBLEVEL := 28
  56. VERSION := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
  57. # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
  58. LC_ALL := C
  59. export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION LC_ALL
  60. SHARED_MAJORNAME:=libc.so.$(MAJOR_VERSION)
  61. UCLIBC_LDSO:=ld-uClibc.so.$(MAJOR_VERSION)
  62. NONSHARED_LIBNAME:=uclibc_nonshared.a
  63. # Make sure DESTDIR and PREFIX can be used to install
  64. # PREFIX is a uClibcism while DESTDIR is a common GNUism
  65. ifndef PREFIX
  66. PREFIX = $(DESTDIR)
  67. endif
  68. # Pull in the user's uClibc configuration
  69. ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
  70. -include $(TOPDIR).config
  71. endif
  72. ifndef CROSS
  73. CROSS=$(subst ",, $(strip $(CROSS_COMPILER_PREFIX)))
  74. endif
  75. # A nifty macro to make testing gcc features easier
  76. check_gcc=$(shell \
  77. if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
  78. then echo "$(1)"; else echo "$(2)"; fi)
  79. check_as=$(shell \
  80. if $(CC) -Wa,$(1) -Wa,-Z -c -o /dev/null -xassembler /dev/null > /dev/null 2>&1; \
  81. then echo "-Wa,$(1)"; fi)
  82. # Setup some shortcuts so that silent mode is silent like it should be
  83. ifeq ($(findstring s,$(MAKEFLAGS)),)
  84. export MAKE_IS_SILENT=n
  85. SECHO=@echo
  86. SHELL_SET_X=set -x
  87. else
  88. export MAKE_IS_SILENT=y
  89. SECHO=-@false
  90. SHELL_SET_X=set +x
  91. endif
  92. # Make certain these contain a final "/", but no "//"s.
  93. TARGET_ARCH:=$(shell grep -s ^TARGET_ARCH $(TOPDIR)/.config | sed -e 's/^TARGET_ARCH=//' -e 's/"//g')
  94. RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(RUNTIME_PREFIX))))))
  95. DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(DEVEL_PREFIX))))))
  96. KERNEL_SOURCE:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(KERNEL_SOURCE))))))
  97. export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_SOURCE
  98. ARFLAGS:=cr
  99. OPTIMIZATION:=
  100. PICFLAG:=-fPIC
  101. PIEFLAG_NAME:=-fPIE
  102. # Some nice CPU specific optimizations
  103. ifeq ($(strip $(TARGET_ARCH)),i386)
  104. OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
  105. OPTIMIZATION+=$(call check_gcc,-falign-jumps=0 -falign-loops=0,-malign-jumps=0 -malign-loops=0)
  106. CPU_CFLAGS-$(CONFIG_386)+=-march=i386
  107. CPU_CFLAGS-$(CONFIG_486)+=-march=i486
  108. CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
  109. CPU_CFLAGS-$(CONFIG_586)+=-march=i586
  110. CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
  111. CPU_CFLAGS-$(CONFIG_686)+=-march=i686
  112. CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
  113. CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
  114. CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
  115. CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
  116. CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-march=i686) $(call check_gcc,-falign-functions=4,-malign-functions=4)
  117. CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686 $(call check_gcc,-falign-functions=0,-malign-functions=0)
  118. CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
  119. CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
  120. CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486) $(call check_gcc,-falign-functions=0,-malign-functions=0)
  121. CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
  122. endif
  123. ifeq ($(strip $(TARGET_ARCH)),sparc)
  124. CPU_CFLAGS-$(CONFIG_SPARC_V7)+=-mcpu=v7
  125. CPU_CFLAGS-$(CONFIG_SPARC_V8)+=-mcpu=v8
  126. CPU_CFLAGS-$(CONFIG_SPARC_V9)+=-mcpu=v9
  127. CPU_CFLAGS-$(CONFIG_SPARC_V9B)+=$(call check_gcc,-mcpu=v9b,-mcpu=ultrasparc)
  128. endif
  129. ifeq ($(strip $(TARGET_ARCH)),arm)
  130. OPTIMIZATION+=-fstrict-aliasing
  131. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
  132. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
  133. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
  134. CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
  135. CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
  136. CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
  137. CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
  138. CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4
  139. CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4
  140. CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4
  141. CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv5
  142. CPU_CFLAGS-$(CONFIG_ARM1136JF_S)+=-mtune=arm1136jf-s -march=armv6
  143. CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
  144. CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
  145. CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
  146. CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv4 -Wa,-mcpu=xscale
  147. endif
  148. ifeq ($(strip $(TARGET_ARCH)),mips)
  149. CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
  150. CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
  151. CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
  152. CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
  153. CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
  154. CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
  155. endif
  156. ifeq ($(strip $(TARGET_ARCH)),sh)
  157. OPTIMIZATION+=-fstrict-aliasing
  158. OPTIMIZATION+= $(call check_gcc,-mprefergot,)
  159. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
  160. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
  161. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
  162. CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
  163. CPU_CFLAGS-$(CONFIG_SH2)+=-m2
  164. CPU_CFLAGS-$(CONFIG_SH3)+=-m3
  165. ifeq ($(UCLIBC_HAS_FLOATS),y)
  166. CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
  167. CPU_CFLAGS-$(CONFIG_SH4)+=-m4
  168. else
  169. CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
  170. CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
  171. endif
  172. endif
  173. ifeq ($(strip $(TARGET_ARCH)),sh64)
  174. OPTIMIZATION+=-fstrict-aliasing
  175. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):=-EL
  176. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):=-EB
  177. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
  178. CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
  179. CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
  180. endif
  181. ifeq ($(strip $(TARGET_ARCH)),h8300)
  182. CPU_LDFLAGS-$(CONFIG_H8300H)+= -ms8300h
  183. CPU_LDFLAGS-$(CONFIG_H8S) += -ms8300s
  184. CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32 -fsigned-char
  185. CPU_CFLAGS-$(CONFIG_H8S) += -ms -mint32 -fsigned-char
  186. endif
  187. ifeq ($(strip $(TARGET_ARCH)),cris)
  188. CPU_LDFLAGS-$(CONFIG_CRIS)+=-mcrislinux
  189. CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
  190. PICFLAG:=-fpic
  191. PIEFLAG_NAME:=-fpie
  192. endif
  193. ifeq ($(strip $(TARGET_ARCH)),powerpc)
  194. # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
  195. # enough. Therefore use -fpic which will reduce code size and generates
  196. # faster code.
  197. PICFLAG:=-fpic
  198. PIEFLAG_NAME:=-fpie
  199. endif
  200. ifeq ($(strip $(TARGET_ARCH)),frv)
  201. CPU_LDFLAGS-$(CONFIG_FRV)+=-melf32frvfd
  202. CPU_CFLAGS-$(CONFIG_FRV)+=-mfdpic
  203. # Using -pie causes the program to have an interpreter, which is
  204. # forbidden, so we must make do with -shared. Unfortunately,
  205. # -shared by itself would get us global function descriptors
  206. # and calls through PLTs, dynamic resolution of symbols, etc,
  207. # which would break as well, but -Bsymbolic comes to the rescue.
  208. export LDPIEFLAG:=-shared -Bsymbolic
  209. UCLIBC_LDSO=ld.so.1
  210. endif
  211. # Keep the check_gcc from being needlessly executed
  212. ifndef PIEFLAG
  213. ifneq ($(UCLIBC_BUILD_PIE),y)
  214. export PIEFLAG:=
  215. else
  216. export PIEFLAG:=$(call check_gcc,$(PIEFLAG_NAME),$(PICFLAG))
  217. endif
  218. endif
  219. # We need to keep track of both the CC PIE flag (above) as
  220. # well as the LD PIE flag (below) because we can't rely on
  221. # gcc passing -pie if we used -fPIE
  222. ifndef LDPIEFLAG
  223. ifneq ($(UCLIBC_BUILD_PIE),y)
  224. export LDPIEFLAG:=
  225. else
  226. export LDPIEFLAG:=$(shell $(LD) --help | grep -q pie && echo "-Wl,-pie")
  227. endif
  228. endif
  229. # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
  230. ifndef ASNEEDED
  231. ifneq ($(UCLIBC_HAS_SSP),y)
  232. export ASNEEDED:=
  233. else
  234. 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 $LD_TMP ) )
  235. endif
  236. endif
  237. # Use '-Os' optimization if available, else use -O2, allow Config to override
  238. OPTIMIZATION+=$(call check_gcc,-Os,-O2)
  239. # Use the gcc 3.4 -funit-at-a-time optimization when available
  240. OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
  241. # Add a bunch of extra pedantic annoyingly strict checks
  242. XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing
  243. XARCH_CFLAGS=$(subst ",, $(strip $(ARCH_CFLAGS)))
  244. CPU_CFLAGS=$(subst ",, $(strip $(CPU_CFLAGS-y)))
  245. LDADD_LIBFLOAT=
  246. ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
  247. # Add -msoft-float to the CPU_FLAGS since ldso and libdl ignore CFLAGS.
  248. # If -msoft-float isn't supported, we want an error anyway.
  249. # Hmm... might need to revisit this for arm since it has 2 different
  250. # soft float encodings.
  251. CPU_CFLAGS += -msoft-float
  252. ifeq ($(strip $(TARGET_ARCH)),arm)
  253. # No longer needed with current toolchains, but leave it here for now.
  254. # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
  255. # LDADD_LIBFLOAT=-lfloat
  256. endif
  257. endif
  258. SSP_DISABLE_FLAGS?=$(call check_gcc,-fno-stack-protector,)
  259. ifeq ($(UCLIBC_BUILD_SSP),y)
  260. SSP_CFLAGS:=$(call check_gcc,-fno-stack-protector-all,)
  261. SSP_CFLAGS+=$(call check_gcc,-fstack-protector,)
  262. SSP_ALL_CFLAGS?=$(call check_gcc,-fstack-protector-all,)
  263. else
  264. SSP_CFLAGS:=$(SSP_DISABLE_FLAGS)
  265. endif
  266. # Some nice CFLAGS to work with
  267. CFLAGS:=$(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
  268. -fno-builtin -nostdinc -D_LIBC -I$(TOPDIR)include -I.
  269. LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -shared --warn-common --warn-once -z combreloc -z defs
  270. ifeq ($(DODEBUG),y)
  271. #CFLAGS += -g3
  272. CFLAGS += -O0 -g3
  273. LDFLAGS := $(LDFLAGS_NOSTRIP)
  274. STRIPTOOL:= true -Since_we_are_debugging
  275. else
  276. CFLAGS += $(OPTIMIZATION) $(XARCH_CFLAGS)
  277. LDFLAGS := $(LDFLAGS_NOSTRIP) -s
  278. endif
  279. ifeq ($(DOMULTI),y)
  280. # we try to compile all sources at once into an object (IMA), but
  281. # gcc-3.3.x does not support it
  282. # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources
  283. # gcc-4.0.x supports it, supports the --combine flag, but does not need it
  284. # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless
  285. GCC_VER?=$(shell $(CC) -dumpversion | cut -d . -f 1)
  286. ifeq ($(GCC_VER),3)
  287. DOMULTI:=n
  288. else
  289. CFLAGS+=$(call check_gcc,--combine,)
  290. endif
  291. else
  292. DOMULTI:=n
  293. endif
  294. ifeq ($(UCLIBC_HAS_THREADS),y)
  295. ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
  296. PTNAME := nptl
  297. else
  298. PTNAME := linuxthreads
  299. endif
  300. PTDIR := $(TOPDIR)libpthread/$(PTNAME)
  301. # set up system dependencies include dirs (NOTE: order matters!)
  302. ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
  303. PTINC:= -I$(PTDIR)/compat \
  304. -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \
  305. -I$(PTDIR)/sysdeps/$(TARGET_ARCH) \
  306. -I$(PTDIR)/sysdeps/unix/sysv/linux \
  307. -I$(PTDIR)/sysdeps/pthread \
  308. -I$(PTDIR)/sysdeps/pthread/bits \
  309. -I$(PTDIR)/sysdeps/generic \
  310. -include $(PTDIR)/compat/libc-symbols.h
  311. #
  312. # Test for TLS if NPTL support was selected.
  313. #
  314. GCC_HAS_TLS=$(shell \
  315. echo "extern __thread int foo;" | $(CC) -o /dev/null -S -xc - 2>&1)
  316. ifneq ($(GCC_HAS_TLS),)
  317. gcc_tls_test_fail:
  318. @echo "####";
  319. @echo "#### Your compiler does not support TLS and you are trying to build uClibc";
  320. @echo "#### with NPTL support. Upgrade your binutils and gcc to versions which";
  321. @echo "#### support TLS for your architecture. Do not contact uClibc maintainers";
  322. @echo "#### about this problem.";
  323. @echo "####";
  324. @echo "#### Exiting...";
  325. @echo "####";
  326. @exit 1;
  327. endif
  328. else
  329. PTINC:= -I$(PTDIR)/sysdeps/$(TARGET_ARCH) \
  330. -I$(PTDIR)/sysdeps/pthread
  331. endif
  332. CFLAGS+=$(PTINC)
  333. endif
  334. ifeq ($(UCLIBC_BUILD_RELRO),y)
  335. LDFLAGS+=-z relro
  336. endif
  337. ifeq ($(UCLIBC_BUILD_NOW),y)
  338. LDFLAGS+=-z now
  339. endif
  340. # Sigh, some stupid versions of gcc can't seem to cope with '-iwithprefix include'
  341. #CFLAGS+=-iwithprefix include
  342. CFLAGS+=-isystem $(shell $(CC) -print-file-name=include)
  343. ifneq ($(DOASSERTS),y)
  344. CFLAGS+=-DNDEBUG
  345. endif
  346. # Keep the check_as from being needlessly executed
  347. ifndef ASFLAGS_NOEXEC
  348. ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
  349. export ASFLAGS_NOEXEC := $(call check_as,--noexecstack)
  350. else
  351. export ASFLAGS_NOEXEC :=
  352. endif
  353. endif
  354. ASFLAGS = $(ASFLAGS_NOEXEC)
  355. LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
  356. LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
  357. LIBGCC_DIR:=$(dir $(LIBGCC))
  358. ########################################
  359. #
  360. # uClinux shared lib support
  361. #
  362. ifeq ($(CONFIG_BINFMT_SHARED_FLAT),y)
  363. # For the shared version of this, we specify no stack and its library ID
  364. FLTFLAGS += -s 0
  365. LIBID=1
  366. export LIBID FLTFLAGS
  367. SHARED_TARGET = lib/libc
  368. endif
  369. TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH))))