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= $(CROSS)strip
  45
  46 # Select the compiler needed to build binaries for your development system
  47 HOSTCC=gcc
  48 HOSTCFLAGS=-O2 -Wall
  49
  50
  51 #--------------------------------------------------------
  52 # Nothing beyond this point should ever be touched by mere mortals.
  53 # Unless you hang out with the gods, you should probably leave all
  54 # this stuff alone.
  55 MAJOR_VERSION:=0
  56 MINOR_VERSION:=9
  57 SUBLEVEL:=18
  58 VERSION:=$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
  59 # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
  60 LC_ALL:= C
  61 export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION LC_ALL
  62
  63 SHARED_FULLNAME:=libuClibc-$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL).so
  64 SHARED_MAJORNAME:=libc.so.$(MAJOR_VERSION)
  65 UCLIBC_LDSO:=ld-uClibc.so.$(MAJOR_VERSION)
  66 LIBNAME:=libc.a
  67 LIBC:=$(TOPDIR)libc/$(LIBNAME)
  68
  69 # Pull in the user's uClibc configuration
  70 ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
  71 -include $(TOPDIR).config
  72 endif
  73
  74 # A nifty macro to make testing gcc features easier
  75 check_gcc=$(shell if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
  76         then echo "$(1)"; else echo "$(2)"; fi)
  77
  78 # check if we have nawk, otherwise user awk
  79 AWK:=$(shell if [ -x /usr/bin/nawk ]; then echo "/usr/bin/nawk"; \
  80         else echo "/usr/bin/awk"; fi)
  81
  82 HOST_ARCH:= $(shell uname -m | sed \
  83                 -e 's/i.86/i386/' \
  84                 -e 's/sparc.*/sparc/' \
  85                 -e 's/arm.*/arm/g' \
  86                 -e 's/m68k.*/m68k/' \
  87                 -e 's/ppc/powerpc/g' \
  88                 -e 's/v850.*/v850/g' \
  89                 -e 's/sh[234].*/sh/' \
  90                 -e 's/mips.*/mips/' \
  91                 )
  92 ifeq ($(strip $(TARGET_ARCH)),)
  93 TARGET_ARCH:=$(shell $(CC) -dumpmachine | sed -e s'/-.*//' \
  94                 -e 's/i.86/i386/' \
  95                 -e 's/sparc.*/sparc/' \
  96                 -e 's/arm.*/arm/g' \
  97                 -e 's/m68k.*/m68k/' \
  98                 -e 's/ppc/powerpc/g' \
  99                 -e 's/v850.*/v850/g' \
 100                 -e 's/sh[234]/sh/' \
 101                 -e 's/mips-.*/mips/' \
 102                 -e 's/mipsel-.*/mipsel/' \
 103                 -e 's/cris.*/cris/' \
 104                 )
 105 endif
 106 export TARGET_ARCH
 107
 108 ARFLAGS:=r
 109
 110 OPTIMIZATION:=
 111 # Some nice CPU specific optimizations
 112 ifeq ($(strip $(TARGET_ARCH)),i386)
 113         OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
 114         OPTIMIZATION+=$(call check_gcc,-falign-jumps=0 -falign-loops=0,-malign-jumps=0 -malign-loops=0)
 115         CPU_CFLAGS-$(CONFIG_386):="-march=i386"
 116         CPU_CFLAGS-$(CONFIG_486):="-march=i486"
 117         CPU_CFLAGS-$(CONFIG_586):="-march=i586"
 118         CPU_CFLAGS-$(CONFIG_586MMX):="$(call check_gcc,-march=pentium-mmx,-march=i586)"
 119         CPU_CFLAGS-$(CONFIG_686):="-march=i686"
 120         CPU_CFLAGS-$(CONFIG_PENTIUMIII):="$(call check_gcc,-march=pentium3,-march=i686)"
 121         CPU_CFLAGS-$(CONFIG_PENTIUM4):="$(call check_gcc,-march=pentium4,-march=i686)"
 122         CPU_CFLAGS-$(CONFIG_K6):="$(call check_gcc,-march=k6,-march=i586)"
 123         CPU_CFLAGS-$(CONFIG_K7):="$(call check_gcc,-march=athlon,-malign-functions=4 -march=i686)"
 124         CPU_CFLAGS-$(CONFIG_CRUSOE):="-march=i686 -malign-functions=0 -malign-jumps=0 -malign-loops=0"
 125         CPU_CFLAGS-$(CONFIG_WINCHIPC6):="$(call check_gcc,-march=winchip-c6,-march=i586)"
 126         CPU_CFLAGS-$(CONFIG_WINCHIP2):="$(call check_gcc,-march=winchip2,-march=i586)"
 127         CPU_CFLAGS-$(CONFIG_CYRIXIII):="$(call check_gcc,-march=c3,-march=i586)"
 128 endif
 129
 130 ifeq ($(strip $(TARGET_ARCH)),arm)
 131         OPTIMIZATION+=-fstrict-aliasing
 132         CPU_CFLAGS-$(CONFIG_GENERIC_ARM):=
 133         CPU_CFLAGS-$(CONFIG_ARM7TDMI):="-march=arm7tdmi"
 134         CPU_CFLAGS-$(CONFIG_STRONGARM):="-march=strongarm"
 135         CPU_CFLAGS-$(CONFIG_XSCALE):="-march=xscale"
 136 endif
 137
 138 ifeq ($(strip $(TARGET_ARCH)),sh)
 139         OPTIMIZATION+=-fstrict-aliasing
 140         OPTIMIZATION+= $(call check_gcc,-mprefergot,)
 141         CPU_LDFLAGS-$(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_SH2)+="-m2"
 146         CPU_CFLAGS-$(CONFIG_SH3)+="-m3"
 147         CPU_CFLAGS-$(CONFIG_SH4)+="-m4"
 148         CPU_CFLAGS-$(CONFIG_SH5)+="-m5"
 149 endif
 150
 151 ifeq ($(strip $(TARGET_ARCH)),h8300)
 152         CPU_LDFLAGS-y:=-mh8300h
 153         CPU_CFLAGS-y+=-mh -mint32 -fsigned-char
 154 endif
 155
 156 ifeq ($(strip $(TARGET_ARCH)),cris)
 157         CPU_LDFLAGS-$(CONFIG_CRIS):="-mcrislinux"
 158         CPU_CFLAGS-$(CONFIG_CRIS):="-mlinux"
 159 endif
 160
 161 # use '-Os' optimization if available, else use -O2, allow Config to override
 162 OPTIMIZATION+=$(call check_gcc,-Os,-O2)
 163
 164
 165 # Add a bunch of extra pedantic annoyingly strict checks
 166 XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing
 167 XARCH_CFLAGS=$(subst ",, $(strip $(ARCH_CFLAGS)))
 168 CPU_CFLAGS=$(subst ",, $(strip $(CPU_CFLAGS-y)))
 169 # Some nice CFLAGS to work with
 170 CFLAGS:=$(XWARNINGS) $(OPTIMIZATION) $(XARCH_CFLAGS) $(CPU_CFLAGS) \
 171         -fno-builtin -nostdinc -D_LIBC -I$(TOPDIR)include -I.
 172
 173 ifeq ($(DODEBUG),y)
 174     CFLAGS += -g
 175     LDFLAGS:= $(CPU_LDFLAGS-y) -shared --warn-common --warn-once -z combreloc
 176     STRIPTOOL:= true -Since_we_are_debugging
 177 else
 178     LDFLAGS := $(CPU_LDFLAGS-y) -s -shared --warn-common --warn-once -z combreloc
 179 endif
 180
 181 # Sigh, some stupid versions of gcc can't seem to cope with '-iwithprefix include'
 182 #CFLAGS+=-iwithprefix include
 183 CFLAGS+=$(shell $(CC) -print-search-dirs | sed -ne "s/install: *\(.*\)/-I\1include/gp")
 184
 185 ifneq ($(DOASSERTS),y)
 186     CFLAGS += -DNDEBUG
 187 endif
 188
 189 ifeq ($(HAVE_SHARED),y)
 190     LIBRARY_CACHE:=#-DUSE_CACHE
 191     ifeq ($(BUILD_UCLIBC_LDSO),y)
 192         LDSO:=$(TOPDIR)lib/$(UCLIBC_LDSO)
 193         DYNAMIC_LINKER:=$(SHARED_LIB_LOADER_PATH)/$(UCLIBC_LDSO)
 194         BUILD_DYNAMIC_LINKER:=$(shell cd $(TOPDIR) && pwd)/lib/$(UCLIBC_LDSO)
 195     else
 196         LDSO:=$(SYSTEM_LDSO)
 197         DYNAMIC_LINKER:=/lib/$(strip $(subst ",, $(notdir $(SYSTEM_LDSO))))
 198         BUILD_DYNAMIC_LINKER:=/lib/$(strip $(subst ",, $(notdir $(SYSTEM_LDSO))))
 199    endif
 200 endif
 201 ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
 202     CFLAGS += $(call check_gcc,-msoft-float,)
 203 endif
 204
 205 CFLAGS_NOPIC:=$(CFLAGS)
 206 ifeq ($(DOPIC),y)
 207 ifeq ($(strip $(TARGET_ARCH)),cris)
 208         CFLAGS += -fpic -mlinux
 209 else
 210     CFLAGS += -fPIC
 211 endif
 212 endif
 213
 214 LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
 215 LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
 216 LIBGCC_DIR:=$(dir $(LIBGCC))
 217
 218 # TARGET_PREFIX is the directory under which which the uClibc runtime
 219 # environment will be installed and used on the target system.   The
 220 # result will look something like the following:
 221 #   TARGET_PREFIX/
 222 #       lib/            <contains all runtime and static libs>
 223 #       usr/lib/        <this directory is searched for runtime libs>
 224 #       etc/            <weher the shared library cache and configuration
 225 #                       information go if you enabled LIBRARY_CACHE above>
 226 # Very few people will need to change this value from the default...
 227 TARGET_PREFIX = /
 228
 229 ########################################
 230 #
 231 # uClinux shared lib support
 232 #
 233
 234 ifdef CONFIG_BINFMT_SHARED_FLAT
 235   # For the shared version of this, we specify no stack and its library ID
 236   FLTFLAGS += -s 0
 237   LIBID=1
 238   export LIBID FLTFLAGS
 239   SHARED_TARGET = lib/libc
 240 endif
 241