Rules.mak

   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
  21 #--------------------------------------------------------
  22 # This file contains rules which are shared between multiple Makefiles.
  23 # All normal configuration options live in the file named ".config".
  24 # Don't mess with this file unless you know what you are doing.
  25
  26
  27 #--------------------------------------------------------
  28 # If you are running a cross compiler, you will want to set 'CROSS'
  29 # to something more interesting...  Target architecture is determined
  30 # by asking the CC compiler what arch it compiles things for, so unless
  31 # your compiler is broken, you should not need to specify TARGET_ARCH
  32 #
  33 # Most people will set this stuff on the command line, i.e.
  34 #        make CROSS=arm-linux-
  35 # will build uClibc for 'arm'.
  36
  37 ifndef CROSS
  38 CROSS=
  39 endif
  40 CC= $(CROSS)gcc
  41 AR= $(CROSS)ar
  42 LD= $(CROSS)ld
  43 NM= $(CROSS)nm
  44 STRIPTOOL= $(CROSS)strip
  45
  46 INSTALL= install
  47 LN= ln
  48 RM= rm -f
  49
  50 # Select the compiler needed to build binaries for your development system
  51 HOSTCC=gcc
  52 HOSTCFLAGS=-O2 -Wall
  53
  54
  55 #--------------------------------------------------------
  56 # Nothing beyond this point should ever be touched by mere mortals.
  57 # Unless you hang out with the gods, you should probably leave all
  58 # this stuff alone.
  59 MAJOR_VERSION:=0
  60 MINOR_VERSION:=9
  61 SUBLEVEL:=26
  62 VERSION:=$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
  63 # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
  64 LC_ALL:= C
  65 export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION LC_ALL
  66
  67 SHARED_FULLNAME:=libuClibc-$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL).so
  68 SHARED_MAJORNAME:=libc.so.$(MAJOR_VERSION)
  69 UCLIBC_LDSO:=ld-uClibc.so.$(MAJOR_VERSION)
  70 LIBNAME:=libc.a
  71 LIBC:=$(TOPDIR)libc/$(LIBNAME)
  72
  73 # Pull in the user's uClibc configuration
  74 ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
  75 -include $(TOPDIR).config
  76 endif
  77
  78 # A nifty macro to make testing gcc features easier
  79 check_gcc=$(shell if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
  80         then echo "$(1)"; else echo "$(2)"; fi)
  81
  82 # Make certain these contain a final "/", but no "//"s.
  83 TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH))))
  84 RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(RUNTIME_PREFIX))))))
  85 DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(DEVEL_PREFIX))))))
  86 export RUNTIME_PREFIX DEVEL_PREFIX
  87
  88 ARFLAGS:=r
  89
  90 OPTIMIZATION:=
  91 PICFLAG:=-fPIC
  92 # Some nice CPU specific optimizations
  93 ifeq ($(strip $(TARGET_ARCH)),i386)
  94         OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
  95         OPTIMIZATION+=$(call check_gcc,-falign-jumps=0 -falign-loops=0,-malign-jumps=0 -malign-loops=0)
  96         CPU_CFLAGS-$(CONFIG_386)+=-march=i386
  97         CPU_CFLAGS-$(CONFIG_486)+=-march=i486
  98         CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
  99         CPU_CFLAGS-$(CONFIG_586)+=-march=i586
 100         CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
 101         CPU_CFLAGS-$(CONFIG_686)+=-march=i686
 102         CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686)
 103         CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
 104         CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
 105         CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
 106         CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-malign-functions=4 -march=i686)
 107         CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686 -malign-functions=0 -malign-jumps=0 -malign-loops=0
 108         CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
 109         CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
 110         CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486) -malign-functions=0 -malign-jumps=0 -malign-loops=0
 111         CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686)
 112 endif
 113
 114 ifeq ($(strip $(TARGET_ARCH)),arm)
 115         OPTIMIZATION+=-fstrict-aliasing
 116         CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
 117         CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
 118         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
 119         CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
 120         CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
 121         CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
 122         CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
 123         CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4
 124         CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4
 125         CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4
 126         CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv4
 127         CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
 128         CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
 129         CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
 130         CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv4 -Wa,-mcpu=xscale
 131 endif
 132
 133 ifeq ($(strip $(TARGET_ARCH)),mips)
 134         CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
 135         CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
 136         CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
 137         CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
 138         CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
 139         CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
 140 endif
 141
 142 ifeq ($(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-$(CONFIG_SH3)+=-m3
 151         CPU_CFLAGS-$(CONFIG_SH4)+=-m4
 152 endif
 153
 154 ifeq ($(strip $(TARGET_ARCH)),sh64)
 155         OPTIMIZATION+=-fstrict-aliasing
 156         CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):=-EL
 157         CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):=-EB
 158         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
 159         CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
 160         CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
 161 endif
 162
 163 ifeq ($(strip $(TARGET_ARCH)),h8300)
 164         CPU_LDFLAGS-$(CONFIG_H8300H)+= -ms8300h
 165         CPU_LDFLAGS-$(CONFIG_H8S)   += -ms8300s
 166         CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32 -fsigned-char
 167         CPU_CFLAGS-$(CONFIG_H8S)    += -ms -mint32 -fsigned-char
 168 endif
 169
 170 ifeq ($(strip $(TARGET_ARCH)),cris)
 171         CPU_LDFLAGS-$(CONFIG_CRIS)+=-mcrislinux
 172         CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
 173         PICFLAG=-fpic
 174 endif
 175
 176 ifeq ($(strip $(TARGET_ARCH)),frv)
 177         CPU_LDFLAGS-$(CONFIG_FRV)+=-melf32frvfd
 178         CPU_CFLAGS-$(CONFIG_FRV)+=-mfdpic
 179         PICFLAG=-fPIC -DPIC
 180         PIEFLAG=-fpie
 181         # Using -pie causes the program to have an interpreter, which is
 182         # forbidden, so we must make do with -shared.  Unfortunately,
 183         # -shared by itself would get us global function descriptors
 184         # and calls through PLTs, dynamic resolution of symbols, etc,
 185         # which would break as well, but -Bsymbolic comes to the rescue.
 186         LDPIEFLAG=-shared -Bsymbolic
 187         UCLIBC_LDSO=ld.so.1
 188 endif
 189
 190 # Use '-Os' optimization if available, else use -O2, allow Config to override
 191 OPTIMIZATION+=$(call check_gcc,-Os,-O2)
 192 # Use the gcc 3.4 -funit-at-a-time optimization when available
 193 OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,)
 194
 195
 196 # Add a bunch of extra pedantic annoyingly strict checks
 197 XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing
 198 XARCH_CFLAGS=$(subst ",, $(strip $(ARCH_CFLAGS)))
 199 CPU_CFLAGS=$(subst ",, $(strip $(CPU_CFLAGS-y)))
 200
 201 LDADD_LIBFLOAT=
 202 ifeq ($(strip $(UCLIBC_HAS_SOFT_FLOAT)),y)
 203 # Add -msoft-float to the CPU_FLAGS since ldso and libdl ignore CFLAGS.
 204 # If -msoft-float isn't supported, we want an error anyway.
 205     CPU_CFLAGS += -msoft-float
 206 ifeq ($(strip $(TARGET_ARCH)),arm)
 207     LDADD_LIBFLOAT=-lfloat
 208 endif
 209 endif
 210
 211 # Some nice CFLAGS to work with
 212 CFLAGS=$(XWARNINGS) $(OPTIMIZATION) $(XARCH_CFLAGS) $(CPU_CFLAGS) \
 213         -fno-builtin -nostdinc -D_LIBC -I$(TOPDIR)include -I.
 214
 215 ifeq ($(DODEBUG),y)
 216     #CFLAGS += -g3
 217     CFLAGS = $(XWARNINGS) -O0 -g3 $(CPU_CFLAGS) -fno-builtin -nostdinc -D_LIBC -I$(TOPDIR)include -I.
 218     LDFLAGS:= $(CPU_LDFLAGS-y) -shared --warn-common --warn-once -z combreloc
 219     STRIPTOOL:= true -Since_we_are_debugging
 220 else
 221     LDFLAGS := $(CPU_LDFLAGS-y) -s -shared --warn-common --warn-once -z combreloc
 222 endif
 223
 224 # Sigh, some stupid versions of gcc can't seem to cope with '-iwithprefix include'
 225 #CFLAGS+=-iwithprefix include
 226 CFLAGS+=$(shell $(CC) -print-search-dirs | sed -ne "s/install: *\(.*\)/-I\1include/gp")
 227
 228 ifneq ($(DOASSERTS),y)
 229     CFLAGS += -DNDEBUG
 230 endif
 231
 232 ifeq ($(HAVE_SHARED),y)
 233     LIBRARY_CACHE:=#-DUSE_CACHE
 234     ifeq ($(BUILD_UCLIBC_LDSO),y)
 235         LDSO:=$(TOPDIR)lib/$(UCLIBC_LDSO)
 236         DYNAMIC_LINKER:=$(SHARED_LIB_LOADER_PREFIX)/$(UCLIBC_LDSO)
 237     else
 238         LDSO:=$(SYSTEM_LDSO)
 239         DYNAMIC_LINKER:=/lib/$(strip $(subst ",, $(notdir $(SYSTEM_LDSO))))
 240    endif
 241 endif
 242
 243 CFLAGS_NOPIC:=$(CFLAGS)
 244 ifeq ($(DOPIC),y)
 245     CFLAGS += $(PICFLAG)
 246 endif
 247
 248 LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
 249 LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
 250 LIBGCC_DIR:=$(dir $(LIBGCC))
 251
 252 ########################################
 253 #
 254 # uClinux shared lib support
 255 #
 256
 257 ifeq ($(CONFIG_BINFMT_SHARED_FLAT),y)
 258   # For the shared version of this, we specify no stack and its library ID
 259   FLTFLAGS += -s 0
 260   LIBID=1
 261   export LIBID FLTFLAGS
 262   SHARED_TARGET = lib/libc
 263 endif
 264
 265 TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH))))
 266