Rules.mak 10 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 Makefiles.
  21. # All normal configuration options live in the file named ".config".
  22. # Don't mess with this file unless you know what you are doing.
  23. #--------------------------------------------------------
  24. # If you are running a cross compiler, you will want to set 'CROSS'
  25. # to something more interesting... Target architecture is determined
  26. # by asking the CC compiler what arch it compiles things for, so unless
  27. # your compiler is broken, you should not need to specify TARGET_ARCH
  28. #
  29. # Most people will set this stuff on the command line, i.e.
  30. # make CROSS=arm-linux-
  31. # will build uClibc for 'arm'.
  32. ifndef CROSS
  33. CROSS=
  34. endif
  35. CC= $(CROSS)gcc
  36. AR= $(CROSS)ar
  37. LD= $(CROSS)ld
  38. NM= $(CROSS)nm
  39. STRIPTOOL= $(CROSS)strip
  40. INSTALL= install
  41. LN= ln
  42. RM= rm -f
  43. # Select the compiler needed to build binaries for your development system
  44. HOSTCC=gcc
  45. HOSTCFLAGS=-O2 -Wall
  46. #--------------------------------------------------------
  47. # Nothing beyond this point should ever be touched by mere mortals.
  48. # Unless you hang out with the gods, you should probably leave all
  49. # this stuff alone.
  50. MAJOR_VERSION:=0
  51. MINOR_VERSION:=9
  52. SUBLEVEL:=26
  53. VERSION:=$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
  54. # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
  55. LC_ALL:= C
  56. export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION LC_ALL
  57. SHARED_FULLNAME:=libuClibc-$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL).so
  58. SHARED_MAJORNAME:=libc.so.$(MAJOR_VERSION)
  59. UCLIBC_LDSO:=ld-uClibc.so.$(MAJOR_VERSION)
  60. LIBNAME:=libc.a
  61. LIBC:=$(TOPDIR)libc/$(LIBNAME)
  62. # Pull in the user's uClibc configuration
  63. ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
  64. -include $(TOPDIR).config
  65. endif
  66. # A nifty macro to make testing gcc features easier
  67. check_gcc=$(shell if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
  68. then echo "$(1)"; else echo "$(2)"; fi)
  69. # Make certain these contain a final "/", but no "//"s.
  70. TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH))))
  71. RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(RUNTIME_PREFIX))))))
  72. DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(DEVEL_PREFIX))))))
  73. export RUNTIME_PREFIX DEVEL_PREFIX
  74. ARFLAGS:=r
  75. OPTIMIZATION:=
  76. PICFLAG:=-fPIC
  77. PIEFLAG:=$(call check_gcc,-fPIE,)
  78. ifeq ($(strip $(PIEFLAG)),-fPIE)
  79. LDPIEFLAG:=-Wl,-pie
  80. endif
  81. # Some nice CPU specific optimizations
  82. ifeq ($(strip $(TARGET_ARCH)),i386)
  83. OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
  84. OPTIMIZATION+=$(call check_gcc,-falign-jumps=0 -falign-loops=0,-malign-jumps=0 -malign-loops=0)
  85. CPU_CFLAGS-$(CONFIG_386)+=-march=i386
  86. CPU_CFLAGS-$(CONFIG_486)+=-march=i486
  87. CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
  88. CPU_CFLAGS-$(CONFIG_586)+=-march=i586
  89. CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
  90. CPU_CFLAGS-$(CONFIG_686)+=-march=i686
  91. CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
  92. CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
  93. CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
  94. CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
  95. CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-malign-functions=4 -march=i686)
  96. CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686 -malign-functions=0 -malign-jumps=0 -malign-loops=0
  97. CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
  98. CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
  99. CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486) -malign-functions=0 -malign-jumps=0 -malign-loops=0
  100. CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
  101. endif
  102. ifeq ($(strip $(TARGET_ARCH)),arm)
  103. OPTIMIZATION+=-fstrict-aliasing
  104. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
  105. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
  106. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
  107. CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
  108. CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
  109. CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
  110. CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
  111. CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4
  112. CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4
  113. CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4
  114. CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv4
  115. CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
  116. CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
  117. CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
  118. CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv4 -Wa,-mcpu=xscale
  119. endif
  120. ifeq ($(strip $(TARGET_ARCH)),mips)
  121. CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
  122. CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
  123. CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
  124. CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
  125. CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
  126. CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
  127. endif
  128. ifeq ($(strip $(TARGET_ARCH)),sh)
  129. OPTIMIZATION+=-fstrict-aliasing
  130. OPTIMIZATION+= $(call check_gcc,-mprefergot,)
  131. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
  132. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
  133. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
  134. CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
  135. CPU_CFLAGS-$(CONFIG_SH2)+=-m2
  136. CPU_CFLAGS-$(CONFIG_SH3)+=-m3
  137. CPU_CFLAGS-$(CONFIG_SH4)+=-m4
  138. endif
  139. ifeq ($(strip $(TARGET_ARCH)),sh64)
  140. OPTIMIZATION+=-fstrict-aliasing
  141. CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):=-EL
  142. CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):=-EB
  143. CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
  144. CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
  145. CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
  146. endif
  147. ifeq ($(strip $(TARGET_ARCH)),h8300)
  148. CPU_LDFLAGS-$(CONFIG_H8300H)+= -ms8300h
  149. CPU_LDFLAGS-$(CONFIG_H8S) += -ms8300s
  150. CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32 -fsigned-char
  151. CPU_CFLAGS-$(CONFIG_H8S) += -ms -mint32 -fsigned-char
  152. endif
  153. ifeq ($(strip $(TARGET_ARCH)),cris)
  154. CPU_LDFLAGS-$(CONFIG_CRIS)+=-mcrislinux
  155. CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
  156. PICFLAG:=-fpic
  157. PIEFLAG:=$(call check_gcc,-fpie,)
  158. endif
  159. ifeq ($(strip $(TARGET_ARCH)),powerpc)
  160. # PowerPC can hold 8192 entries in its GOT with -fpic which is more than
  161. # enough. Therefore use -fpic which will reduce code size and generates
  162. # faster code.
  163. PICFLAG:=-fpic
  164. PIEFLAG=$(call check_gcc,-fpie,)
  165. endif
  166. ifeq ($(strip $(TARGET_ARCH)),frv)
  167. CPU_LDFLAGS-$(CONFIG_FRV)+=-melf32frvfd
  168. CPU_CFLAGS-$(CONFIG_FRV)+=-mfdpic
  169. PICFLAG=-fPIC -DPIC
  170. PIEFLAG=$(call check_gcc,-fpie,)
  171. # Using -pie causes the program to have an interpreter, which is
  172. # forbidden, so we must make do with -shared. Unfortunately,
  173. # -shared by itself would get us global function descriptors
  174. # and calls through PLTs, dynamic resolution of symbols, etc,
  175. # which would break as well, but -Bsymbolic comes to the rescue.
  176. LDPIEFLAG=-shared -Bsymbolic
  177. UCLIBC_LDSO=ld.so.1
  178. endif
  179. # Use '-Os' optimization if available, else use -O2, allow Config to override
  180. OPTIMIZATION+=$(call check_gcc,-Os,-O2)
  181. # Use the gcc 3.4 -funit-at-a-time optimization when available
  182. OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
  183. # Add a bunch of extra pedantic annoyingly strict checks
  184. XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing
  185. XARCH_CFLAGS=$(subst ",, $(strip $(ARCH_CFLAGS)))
  186. CPU_CFLAGS=$(subst ",, $(strip $(CPU_CFLAGS-y)))
  187. LDADD_LIBFLOAT=
  188. ifeq ($(strip $(UCLIBC_HAS_SOFT_FLOAT)),y)
  189. # Add -msoft-float to the CPU_FLAGS since ldso and libdl ignore CFLAGS.
  190. # If -msoft-float isn't supported, we want an error anyway.
  191. # Hmm... might need to revisit this for arm since it has 2 different
  192. # soft float encodings.
  193. CPU_CFLAGS += -msoft-float
  194. ifeq ($(strip $(TARGET_ARCH)),arm)
  195. # No longer needed with current toolchains, but leave it here for now.
  196. # If anyone is actually still using gcc 2.95 (say), they can uncomment it.
  197. # LDADD_LIBFLOAT=-lfloat
  198. endif
  199. endif
  200. ifneq ($(strip $(UCLIBC_PIE_SUPPORT)),y)
  201. PIEFLAG=
  202. LDPIEFLAG=
  203. endif
  204. ifeq ($(SSP_CFLAGS),)
  205. SSP_CFLAGS=$(call check_gcc,-fno-stack-protector-all,)
  206. SSP_CFLAGS+=$(call check_gcc,-fstack-protector,)
  207. endif
  208. # Some nice CFLAGS to work with
  209. CFLAGS=$(XWARNINGS) $(OPTIMIZATION) $(XARCH_CFLAGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
  210. -fno-builtin -nostdinc -D_LIBC -I$(TOPDIR)include -I.
  211. ifeq ($(DODEBUG),y)
  212. #CFLAGS += -g3
  213. CFLAGS = $(XWARNINGS) -O0 -g3 $(CPU_CFLAGS) -fno-builtin -nostdinc -D_LIBC -I$(TOPDIR)include -I.
  214. LDFLAGS:= $(CPU_LDFLAGS-y) -shared --warn-common --warn-once -z combreloc
  215. STRIPTOOL:= true -Since_we_are_debugging
  216. else
  217. LDFLAGS := $(CPU_LDFLAGS-y) -s -shared --warn-common --warn-once -z combreloc
  218. endif
  219. # Sigh, some stupid versions of gcc can't seem to cope with '-iwithprefix include'
  220. #CFLAGS+=-iwithprefix include
  221. CFLAGS+=$(shell $(CC) -print-search-dirs | sed -ne "s/install: *\(.*\)/-I\1include/gp")
  222. ifneq ($(DOASSERTS),y)
  223. CFLAGS += -DNDEBUG
  224. endif
  225. ifeq ($(HAVE_SHARED),y)
  226. ifeq ($(BUILD_UCLIBC_LDSO),y)
  227. LDSO:=$(TOPDIR)lib/$(UCLIBC_LDSO)
  228. DYNAMIC_LINKER:=$(SHARED_LIB_LOADER_PREFIX)/$(UCLIBC_LDSO)
  229. else
  230. LDSO:=$(SYSTEM_LDSO)
  231. DYNAMIC_LINKER:=/lib/$(strip $(subst ",, $(notdir $(SYSTEM_LDSO))))
  232. endif
  233. endif
  234. CFLAGS_NOPIC:=$(CFLAGS)
  235. ifeq ($(DOPIC),y)
  236. CFLAGS += $(PICFLAG)
  237. endif
  238. LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
  239. LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
  240. LIBGCC_DIR:=$(dir $(LIBGCC))
  241. ########################################
  242. #
  243. # uClinux shared lib support
  244. #
  245. ifeq ($(CONFIG_BINFMT_SHARED_FLAT),y)
  246. # For the shared version of this, we specify no stack and its library ID
  247. FLTFLAGS += -s 0
  248. LIBID=1
  249. export LIBID FLTFLAGS
  250. SHARED_TARGET = lib/libc
  251. endif
  252. TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH))))