Rules.mak 11 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. RANLIB = $(CROSS)ranlib
  42. STRIPTOOL = $(CROSS)strip
  43. INSTALL = install
  44. LN = ln
  45. RM = rm -f
  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 := 27
  56. VERSION := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
  57. # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
  58. LC_ALL := C
  59. export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION LC_ALL
  60. SHARED_FULLNAME:=libuClibc-$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL).so
  61. SHARED_MAJORNAME:=libc.so.$(MAJOR_VERSION)
  62. UCLIBC_LDSO:=ld-uClibc.so.$(MAJOR_VERSION)
  63. LIBNAME:=libc.a
  64. LIBC:=$(TOPDIR)libc/$(LIBNAME)
  65. # Make sure DESTDIR and PREFIX can be used to install
  66. # PREFIX is a uClibcism while DESTDIR is a common GNUism
  67. ifndef PREFIX
  68. PREFIX = $(DESTDIR)
  69. endif
  70. # Pull in the user's uClibc configuration
  71. ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
  72. -include $(TOPDIR).config
  73. endif
  74. ifndef CROSS
  75. CROSS=$(subst ",, $(strip $(CROSS_COMPILER_PREFIX)))
  76. endif
  77. # A nifty macro to make testing gcc features easier
  78. check_gcc=$(shell if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
  79. then echo "$(1)"; else echo "$(2)"; fi)
  80. check_as=$(shell if $(CC) -Wa,$(1) -Wa,-Z -c -o /dev/null -xassembler /dev/null > /dev/null 2>&1; \
  81. then echo "-Wa,$(1)"; fi)
  82. # Make certain these contain a final "/", but no "//"s.
  83. TARGET_ARCH:=$(shell grep -s ^TARGET_ARCH $(TOPDIR)/.config | sed -e 's/^TARGET_ARCH=//' -e 's/"//g')
  84. RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(RUNTIME_PREFIX))))))
  85. DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(DEVEL_PREFIX))))))
  86. export RUNTIME_PREFIX DEVEL_PREFIX
  87. ARFLAGS:=r
  88. OPTIMIZATION:=
  89. PICFLAG:=-fPIC
  90. PIEFLAG:=$(call check_gcc,-fPIE,)
  91. ifeq ($(strip $(PIEFLAG)),-fPIE)
  92. LDPIEFLAG:=$(shell $(LD) --help | grep -q pie && echo "-Wl,-pie")
  93. endif
  94. # Some nice CPU specific optimizations
  95. ifeq ($(strip $(TARGET_ARCH)),i386)
  96. OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
  97. OPTIMIZATION+=$(call check_gcc,-falign-jumps=0 -falign-loops=0,-malign-jumps=0 -malign-loops=0)
  98. CPU_CFLAGS-$(CONFIG_386)+=-march=i386
  99. CPU_CFLAGS-$(CONFIG_486)+=-march=i486
  100. CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
  101. CPU_CFLAGS-$(CONFIG_586)+=-march=i586
  102. CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
  103. CPU_CFLAGS-$(CONFIG_686)+=-march=i686
  104. CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
  105. CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
  106. CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
  107. CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
  108. CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-malign-functions=4 -march=i686)
  109. CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686 -malign-functions=0 -malign-jumps=0 -malign-loops=0
  110. CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
  111. CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
  112. CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486) -malign-functions=0 -malign-jumps=0 -malign-loops=0
  113. CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
  114. endif
  115. ifeq ($(strip $(TARGET_ARCH)),arm)
  116. OPTIMIZATION+=-fstrict-aliasing
  117. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
  118. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
  119. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
  120. CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
  121. CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
  122. CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
  123. CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
  124. CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4
  125. CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4
  126. CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4
  127. CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv4
  128. CPU_CFLAGS-$(CONFIG_ARM1136JF_S)+=-mtune=arm1136jf-s -march=armv6
  129. CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
  130. CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
  131. CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
  132. CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv4 -Wa,-mcpu=xscale
  133. endif
  134. ifeq ($(strip $(TARGET_ARCH)),mips)
  135. CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
  136. CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
  137. CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
  138. CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
  139. CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
  140. CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
  141. endif
  142. ifeq ($(strip $(TARGET_ARCH)),sh)
  143. OPTIMIZATION+=-fstrict-aliasing
  144. OPTIMIZATION+= $(call check_gcc,-mprefergot,)
  145. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
  146. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
  147. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
  148. CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
  149. CPU_CFLAGS-$(CONFIG_SH2)+=-m2
  150. CPU_CFLAGS-$(CONFIG_SH3)+=-m3
  151. ifeq ($(strip $(UCLIBC_HAS_FLOATS)),y)
  152. CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a
  153. CPU_CFLAGS-$(CONFIG_SH4)+=-m4
  154. else
  155. CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
  156. CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
  157. endif
  158. endif
  159. ifeq ($(strip $(TARGET_ARCH)),sh64)
  160. OPTIMIZATION+=-fstrict-aliasing
  161. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):=-EL
  162. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):=-EB
  163. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
  164. CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
  165. CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
  166. endif
  167. ifeq ($(strip $(TARGET_ARCH)),h8300)
  168. CPU_LDFLAGS-$(CONFIG_H8300H)+= -ms8300h
  169. CPU_LDFLAGS-$(CONFIG_H8S) += -ms8300s
  170. CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32 -fsigned-char
  171. CPU_CFLAGS-$(CONFIG_H8S) += -ms -mint32 -fsigned-char
  172. endif
  173. ifeq ($(strip $(TARGET_ARCH)),cris)
  174. CPU_LDFLAGS-$(CONFIG_CRIS)+=-mcrislinux
  175. CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
  176. PICFLAG:=-fpic
  177. PIEFLAG:=$(call check_gcc,-fpie,)
  178. endif
  179. ifeq ($(strip $(TARGET_ARCH)),powerpc)
  180. # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
  181. # enough. Therefore use -fpic which will reduce code size and generates
  182. # faster code.
  183. PICFLAG:=-fpic
  184. PIEFLAG:=$(call check_gcc,-fpie,)
  185. endif
  186. ifeq ($(strip $(TARGET_ARCH)),frv)
  187. CPU_LDFLAGS-$(CONFIG_FRV)+=-melf32frvfd
  188. CPU_CFLAGS-$(CONFIG_FRV)+=-mfdpic
  189. # Using -pie causes the program to have an interpreter, which is
  190. # forbidden, so we must make do with -shared. Unfortunately,
  191. # -shared by itself would get us global function descriptors
  192. # and calls through PLTs, dynamic resolution of symbols, etc,
  193. # which would break as well, but -Bsymbolic comes to the rescue.
  194. LDPIEFLAG=-shared -Bsymbolic
  195. UCLIBC_LDSO=ld.so.1
  196. endif
  197. # Use '-Os' optimization if available, else use -O2, allow Config to override
  198. OPTIMIZATION+=$(call check_gcc,-Os,-O2)
  199. # Use the gcc 3.4 -funit-at-a-time optimization when available
  200. OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
  201. # Add a bunch of extra pedantic annoyingly strict checks
  202. XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing
  203. XARCH_CFLAGS=$(subst ",, $(strip $(ARCH_CFLAGS)))
  204. CPU_CFLAGS=$(subst ",, $(strip $(CPU_CFLAGS-y)))
  205. LDADD_LIBFLOAT=
  206. ifeq ($(strip $(UCLIBC_HAS_SOFT_FLOAT)),y)
  207. # Add -msoft-float to the CPU_FLAGS since ldso and libdl ignore CFLAGS.
  208. # If -msoft-float isn't supported, we want an error anyway.
  209. # Hmm... might need to revisit this for arm since it has 2 different
  210. # soft float encodings.
  211. CPU_CFLAGS += -msoft-float
  212. ifeq ($(strip $(TARGET_ARCH)),arm)
  213. # No longer needed with current toolchains, but leave it here for now.
  214. # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
  215. # LDADD_LIBFLOAT=-lfloat
  216. endif
  217. endif
  218. ifneq ($(UCLIBC_BUILD_PIE),y)
  219. PIEFLAG=
  220. LDPIEFLAG=
  221. endif
  222. SSP_DISABLE_FLAGS:=$(call check_gcc,-fno-stack-protector,)
  223. ifeq ($(UCLIBC_BUILD_SSP),y)
  224. SSP_CFLAGS:=$(call check_gcc,-fno-stack-protector-all,)
  225. SSP_CFLAGS+=$(call check_gcc,-fstack-protector,)
  226. SSP_ALL_CFLAGS:=$(call check_gcc,-fstack-protector-all,)
  227. else
  228. SSP_CFLAGS:=$(SSP_DISABLE_FLAGS)
  229. endif
  230. # Some nice CFLAGS to work with
  231. CFLAGS:=$(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
  232. -fno-builtin -nostdinc -D_LIBC -I$(TOPDIR)include -I.
  233. LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -shared --warn-common --warn-once -z combreloc -z defs
  234. ifeq ($(DODEBUG),y)
  235. #CFLAGS += -g3
  236. CFLAGS += -O0 -g3
  237. LDFLAGS := $(LDFLAGS_NOSTRIP)
  238. STRIPTOOL:= true -Since_we_are_debugging
  239. else
  240. CFLAGS += $(OPTIMIZATION) $(XARCH_CFLAGS)
  241. LDFLAGS := $(LDFLAGS_NOSTRIP) -s
  242. endif
  243. ifeq ($(UCLIBC_BUILD_RELRO),y)
  244. LDFLAGS+=-z relro
  245. endif
  246. ifeq ($(UCLIBC_BUILD_NOW),y)
  247. LDFLAGS+=-z now
  248. endif
  249. # Sigh, some stupid versions of gcc can't seem to cope with '-iwithprefix include'
  250. #CFLAGS+=-iwithprefix include
  251. CFLAGS+=-isystem $(shell $(CC) -print-file-name=include)
  252. ifneq ($(DOASSERTS),y)
  253. CFLAGS += -DNDEBUG
  254. endif
  255. ifeq ($(HAVE_SHARED),y)
  256. ifeq ($(BUILD_UCLIBC_LDSO),y)
  257. LDSO:=$(TOPDIR)lib/$(UCLIBC_LDSO)
  258. DYNAMIC_LINKER:=$(SHARED_LIB_LOADER_PREFIX)/$(UCLIBC_LDSO)
  259. else
  260. LDSO:=$(SYSTEM_LDSO)
  261. DYNAMIC_LINKER:=/lib/$(strip $(subst ",, $(notdir $(SYSTEM_LDSO))))
  262. endif
  263. endif
  264. CFLAGS_NOPIC:=$(CFLAGS)
  265. ifeq ($(DOPIC),y)
  266. CFLAGS += $(PICFLAG)
  267. endif
  268. ifeq ($(DL_FINI_CRT_COMPAT),y)
  269. CFLAGS += -D_DL_FINI_CRT_COMPAT
  270. endif
  271. ASFLAGS = $(CFLAGS)
  272. ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
  273. ASFLAGS += $(call check_as,--noexecstack)
  274. endif
  275. LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
  276. LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
  277. LIBGCC_DIR:=$(dir $(LIBGCC))
  278. ########################################
  279. #
  280. # uClinux shared lib support
  281. #
  282. ifeq ($(CONFIG_BINFMT_SHARED_FLAT),y)
  283. # For the shared version of this, we specify no stack and its library ID
  284. FLTFLAGS += -s 0
  285. LIBID=1
  286. export LIBID FLTFLAGS
  287. SHARED_TARGET = lib/libc
  288. endif
  289. TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH))))