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=mipsel-linux-
  35 # will build uClibc for 'mipsel'.
  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= $(CROSS)strip
  45
  46 INSTALL= install
  47
  48 # Select the compiler needed to build binaries for your development system
  49 HOSTCC=gcc
  50 HOSTCFLAGS=-O2 -Wall
  51
  52
  53 #--------------------------------------------------------
  54 # Nothing beyond this point should ever be touched by mere mortals.
  55 # Unless you hang out with the gods, you should probably leave all
  56 # this stuff alone.
  57 MAJOR_VERSION:=0
  58 MINOR_VERSION:=9
  59 SUBLEVEL:=21
  60 VERSION:=$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
  61 # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
  62 LC_ALL:= C
  63 export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION LC_ALL
  64
  65 SHARED_FULLNAME:=libuClibc-$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL).so
  66 SHARED_MAJORNAME:=libc.so.$(MAJOR_VERSION)
  67 UCLIBC_LDSO:=ld-uClibc.so.$(MAJOR_VERSION)
  68 LIBNAME:=libc.a
  69 LIBC:=$(TOPDIR)libc/$(LIBNAME)
  70
  71 # Pull in the user's uClibc configuration
  72 ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
  73 -include $(TOPDIR).config
  74 endif
  75
  76 # A nifty macro to make testing gcc features easier
  77 check_gcc=$(shell if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
  78         then echo "$(1)"; else echo "$(2)"; fi)
  79
  80 # check if we have nawk, otherwise user awk
  81 AWK:=$(shell if [ -x /usr/bin/nawk ]; then echo "/usr/bin/nawk"; \
  82         else echo "/usr/bin/awk"; fi)
  83
  84 HOST_ARCH:=$(shell uname -m | sed \
  85                 -e 's/i.86/i386/' \
  86                 -e 's/sparc.*/sparc/' \
  87                 -e 's/arm.*/arm/g' \
  88                 -e 's/m68k.*/m68k/' \
  89                 -e 's/ppc/powerpc/g' \
  90                 -e 's/v850.*/v850/g' \
  91                 -e 's/sh[234].*/sh/' \
  92                 -e 's/mips.*/mips/' \
  93                 )
  94 ifeq ($(strip $(TARGET_ARCH)),)
  95 TARGET_ARCH:=$(shell $(CC) -dumpmachine | sed -e s'/-.*//' \
  96                 -e 's/i.86/i386/' \
  97                 -e 's/sparc.*/sparc/' \
  98                 -e 's/arm.*/arm/g' \
  99                 -e 's/m68k.*/m68k/' \
 100                 -e 's/ppc/powerpc/g' \
 101                 -e 's/v850.*/v850/g' \
 102                 -e 's/sh[234]/sh/' \
 103                 -e 's/mips-.*/mips/' \
 104                 -e 's/mipsel-.*/mipsel/' \
 105                 -e 's/cris.*/cris/' \
 106                 )
 107 endif
 108 export TARGET_ARCH
 109
 110 ARFLAGS:=r
 111
 112 OPTIMIZATION:=
 113 PICFLAG:=-fPIC
 114 # Some nice CPU specific optimizations
 115 ifeq ($(strip $(TARGET_ARCH)),i386)
 116         OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
 117         OPTIMIZATION+=$(call check_gcc,-falign-jumps=0 -falign-loops=0,-malign-jumps=0 -malign-loops=0)
 118         CPU_CFLAGS-$(CONFIG_386)+=-march=i386
 119         CPU_CFLAGS-$(CONFIG_486)+=-march=i486
 120         CPU_CFLAGS-$(CONFIG_586)+=-march=i586
 121         CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
 122         CPU_CFLAGS-$(CONFIG_686)+=-march=i686
 123         CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
 124         CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
 125         CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
 126         CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-malign-functions=4 -march=i686)
 127         CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686 -malign-functions=0 -malign-jumps=0 -malign-loops=0
 128         CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
 129         CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
 130         CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i586)
 131 endif
 132
 133 ifeq ($(strip $(TARGET_ARCH)),arm)
 134         OPTIMIZATION+=-fstrict-aliasing
 135         CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
 136         CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
 137         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
 138         CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
 139         CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
 140         CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
 141         CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
 142         CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4
 143         CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4
 144         CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4
 145         CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv4
 146         CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
 147         CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
 148         CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110) \
 149                                 $(call check_gcc,-march=armv5te,-march=armv4 -Wa$(comma)-mxscale)
 150 endif
 151
 152 ifeq ($(strip $(TARGET_ARCH)),sh)
 153         OPTIMIZATION+=-fstrict-aliasing
 154         OPTIMIZATION+= $(call check_gcc,-mprefergot,)
 155         CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
 156         CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
 157         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
 158         CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
 159         CPU_CFLAGS-$(CONFIG_SH2)+=-m2
 160         CPU_CFLAGS-$(CONFIG_SH3)+=-m3
 161         CPU_CFLAGS-$(CONFIG_SH4)+=-m4
 162 endif
 163
 164 ifeq ($(strip $(TARGET_ARCH)),sh64)
 165         OPTIMIZATION+=-fstrict-aliasing
 166         CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):=-EL
 167         CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):=-EB
 168         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
 169         CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
 170         CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
 171 endif
 172
 173 ifeq ($(strip $(TARGET_ARCH)),h8300)
 174         CPU_LDFLAGS-$(CONFIG_H8300H)+= -ms8300h
 175         CPU_LDFLAGS-$(CONFIG_H8S)   += -ms8300s
 176         CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32 -fsigned-char
 177         CPU_CFLAGS-$(CONFIG_H8S)    += -ms -mint32 -fsigned-char
 178 endif
 179
 180 ifeq ($(strip $(TARGET_ARCH)),cris)
 181         CPU_LDFLAGS-$(CONFIG_CRIS)+=-mcrislinux
 182         CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
 183         PICFLAG=-fpic
 184 endif
 185
 186 # use '-Os' optimization if available, else use -O2, allow Config to override
 187 OPTIMIZATION+=$(call check_gcc,-Os,-O2)
 188
 189
 190 # Add a bunch of extra pedantic annoyingly strict checks
 191 XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing
 192 XARCH_CFLAGS=$(subst ",, $(strip $(ARCH_CFLAGS)))
 193 CPU_CFLAGS=$(subst ",, $(strip $(CPU_CFLAGS-y)))
 194 # Some nice CFLAGS to work with
 195 CFLAGS=$(XWARNINGS) $(OPTIMIZATION) $(XARCH_CFLAGS) $(CPU_CFLAGS) \
 196         -fno-builtin -nostdinc -D_LIBC -I$(TOPDIR)include -I.
 197
 198 ifeq ($(DODEBUG),y)
 199     CFLAGS += -g
 200     #CFLAGS = $(XWARNINGS) -O0 -g $(CPU_CFLAGS) -fno-builtin -nostdinc -D_LIBC -I$(TOPDIR)include -I.
 201     LDFLAGS:= $(CPU_LDFLAGS-y) -shared --warn-common --warn-once -z combreloc
 202     STRIPTOOL:= true -Since_we_are_debugging
 203 else
 204     LDFLAGS := $(CPU_LDFLAGS-y) -s -shared --warn-common --warn-once -z combreloc
 205 endif
 206
 207 # Sigh, some stupid versions of gcc can't seem to cope with '-iwithprefix include'
 208 #CFLAGS+=-iwithprefix include
 209 CFLAGS+=$(shell $(CC) -print-search-dirs | sed -ne "s/install: *\(.*\)/-I\1include/gp")
 210
 211 ifneq ($(DOASSERTS),y)
 212     CFLAGS += -DNDEBUG
 213 endif
 214
 215 ifeq ($(HAVE_SHARED),y)
 216     LIBRARY_CACHE:=#-DUSE_CACHE
 217     ifeq ($(BUILD_UCLIBC_LDSO),y)
 218         LDSO:=$(TOPDIR)lib/$(UCLIBC_LDSO)
 219         DYNAMIC_LINKER:=$(SHARED_LIB_LOADER_PATH)/$(UCLIBC_LDSO)
 220         BUILD_DYNAMIC_LINKER:=$(shell cd $(TOPDIR) && pwd)/lib/$(UCLIBC_LDSO)
 221     else
 222         LDSO:=$(SYSTEM_LDSO)
 223         DYNAMIC_LINKER:=/lib/$(strip $(subst ",, $(notdir $(SYSTEM_LDSO))))
 224         BUILD_DYNAMIC_LINKER:=/lib/$(strip $(subst ",, $(notdir $(SYSTEM_LDSO))))
 225    endif
 226 endif
 227 ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
 228     CFLAGS += $(call check_gcc,-msoft-float,)
 229     #LDFLAGS+= -Wa,-mno-fpu
 230 endif
 231
 232 CFLAGS_NOPIC:=$(CFLAGS)
 233 ifeq ($(DOPIC),y)
 234     CFLAGS += $(PICFLAG)
 235 endif
 236
 237 LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
 238 LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
 239 LIBGCC_DIR:=$(dir $(LIBGCC))
 240
 241 # TARGET_PREFIX is the directory under which which the uClibc runtime
 242 # environment will be installed and used on the target system.   The
 243 # result will look something like the following:
 244 #   TARGET_PREFIX/
 245 #       lib/            <contains all runtime and static libs>
 246 #       usr/lib/        <this directory is searched for runtime libs>
 247 #       etc/            <weher the shared library cache and configuration
 248 #                       information go if you enabled LIBRARY_CACHE above>
 249 # Very few people will need to change this value from the default...
 250 TARGET_PREFIX = /
 251
 252 ########################################
 253 #
 254 # uClinux shared lib support
 255 #
 256
 257 ifeq ($(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