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 CROSS=
  38 CC= $(CROSS)gcc
  39 AR= $(CROSS)ar
  40 LD= $(CROSS)ld
  41 NM= $(CROSS)nm
  42 STRIPTOOL= $(CROSS)strip
  43
  44 # Select the compiler needed to build binaries for your development system
  45 NATIVE_CC=gcc
  46 NATIVE_CFLAGS=-O2 -Wall
  47
  48
  49 #--------------------------------------------------------
  50 # Nothing beyond this point should ever be touched by mere mortals.
  51 # Unless you hang out with the gods, you should probably leave all
  52 # this stuff alone.
  53 MAJOR_VERSION:=0
  54 MINOR_VERSION:=9
  55 SUBLEVEL:=16
  56 VERSION:=$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
  57 # Ensure consistent filename sort order
  58 LC_COLLATE:= C
  59 export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION LC_COLLATE
  60
  61 SHARED_FULLNAME:=libuClibc-$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL).so
  62 SHARED_MAJORNAME:=libc.so.$(MAJOR_VERSION)
  63 UCLIBC_LDSO:=ld-uClibc.so.$(MAJOR_VERSION)
  64 LIBNAME:=libc.a
  65 LIBC:=$(TOPDIR)libc/$(LIBNAME)
  66
  67 # Pull in the user's uClibc configuration
  68 ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
  69 include_config := 1
  70 -include $(TOPDIR).config
  71 endif
  72
  73 # A nifty macro to make testing gcc features easier
  74 check_gcc=$(shell if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
  75         then echo "$(1)"; else echo "$(2)"; fi)
  76
  77 # check if we have nawk, otherwise user awk
  78 AWK:=$(shell if [ -x /usr/bin/nawk ]; then echo "/usr/bin/nawk"; \
  79         else echo "/usr/bin/awk"; fi)
  80
  81 NATIVE_ARCH:= $(shell uname -m | sed \
  82                 -e 's/i.86/i386/' \
  83                 -e 's/sparc.*/sparc/' \
  84                 -e 's/arm.*/arm/g' \
  85                 -e 's/m68k.*/m68k/' \
  86                 -e 's/ppc/powerpc/g' \
  87                 -e 's/v850.*/v850/g' \
  88                 -e 's/sh[234].*/sh/' \
  89                 -e 's/mips.*/mips/' \
  90                 )
  91 ifeq ($(strip $(TARGET_ARCH)),)
  92 TARGET_ARCH:=$(shell $(CC) -dumpmachine | sed -e s'/-.*//' \
  93                 -e 's/i.86/i386/' \
  94                 -e 's/sparc.*/sparc/' \
  95                 -e 's/arm.*/arm/g' \
  96                 -e 's/m68k.*/m68k/' \
  97                 -e 's/ppc/powerpc/g' \
  98                 -e 's/v850.*/v850/g' \
  99                 -e 's/sh[234]/sh/' \
 100                 -e 's/mips-.*/mips/' \
 101                 -e 's/mipsel-.*/mipsel/' \
 102                 -e 's/cris.*/cris/' \
 103                 )
 104 endif
 105 export TARGET_ARCH
 106
 107 ARFLAGS:=r
 108
 109 # use '-Os' optimization if available, else use -O2, allow Config to override
 110 OPTIMIZATION:=
 111 OPTIMIZATION+=$(call check_gcc,-Os,-O2)
 112
 113 # Some nice CPU specific optimizations
 114 ifeq ($(strip $(TARGET_ARCH)),i386)
 115         OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
 116         OPTIMIZATION+=$(call check_gcc,-falign-jumps=0 -falign-loops=0,-malign-jumps=0 -malign-loops=0)
 117         CPU_CFLAGS-$(CONFIG_386):="-march=i386"
 118         CPU_CFLAGS-$(CONFIG_486):="-march=i486"
 119         CPU_CFLAGS-$(CONFIG_586):="-march=i586"
 120         CPU_CFLAGS-$(CONFIG_586MMX):="$(call check_gcc,-march=pentium-mmx,-march=i586)"
 121         CPU_CFLAGS-$(CONFIG_686):="-march=i686"
 122         CPU_CFLAGS-$(CONFIG_PENTIUMIII):="$(call check_gcc,-march=pentium3,-march=i686)"
 123         CPU_CFLAGS-$(CONFIG_PENTIUM4):="$(call check_gcc,-march=pentium4,-march=i686)"
 124         CPU_CFLAGS-$(CONFIG_K6):="$(call check_gcc,-march=k6,-march=i586)"
 125         CPU_CFLAGS-$(CONFIG_K7):="$(call check_gcc,-march=athlon,-malign-functions=4 -march=i686)"
 126         CPU_CFLAGS-$(CONFIG_CRUSOE):="-march=i686 -malign-functions=0 -malign-jumps=0 -malign-loops=0"
 127         CPU_CFLAGS-$(CONFIG_WINCHIPC6):="$(call check_gcc,-march=winchip-c6,-march=i586)"
 128         CPU_CFLAGS-$(CONFIG_WINCHIP2):="$(call check_gcc,-march=winchip2,-march=i586)"
 129         CPU_CFLAGS-$(CONFIG_CYRIXIII):="$(call check_gcc,-march=c3,-march=i586)"
 130 endif
 131
 132 ifeq ($(strip $(TARGET_ARCH)),arm)
 133         OPTIMIZATION+=-fstrict-aliasing
 134         CPU_CFLAGS-$(CONFIG_GENERIC_ARM):=
 135         CPU_CFLAGS-$(CONFIG_ARM7TDMI):="-march=arm7tdmi"
 136         CPU_CFLAGS-$(CONFIG_STRONGARM):="-march=strongarm"
 137         CPU_CFLAGS-$(CONFIG_XSCALE):="$(call check_gcc,-march=xscale,-march=strongarm)"
 138 endif
 139
 140 ifeq ($(strip $(TARGET_ARCH)),sh)
 141         OPTIMIZATION+=-fstrict-aliasing
 142         OPTIMIZATION+= $(call check_gcc,-mprefergot,)
 143         CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):="-EL"
 144         CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):="-EB"
 145         CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):="-ml"
 146         CPU_CFLAGS-$(ARCH_BIG_ENDIAN):="-mb"
 147         CPU_CFLAGS-$(CONFIG_SH2)+="-m2"
 148         CPU_CFLAGS-$(CONFIG_SH3)+="-m3"
 149         CPU_CFLAGS-$(CONFIG_SH4)+="-m4"
 150         CPU_CFLAGS-$(CONFIG_SH5)+="-m5"
 151 endif
 152
 153 # Add a bunch of extra pedantic annoyingly strict checks
 154 WARNINGS+=-Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing
 155
 156 # Some nice CFLAGS to work with
 157 CFLAGS:=$(WARNINGS) $(OPTIMIZATION) -fno-builtin -nostdinc $(CPUFLAGS) \
 158         -D_LIBC $(CPU_CFLAGS-y) $(ARCH_CFLAGS) -I$(TOPDIR)include -I.
 159
 160 # Sigh, some stupid versions of gcc can't seem to cope with '-iwithprefix include'
 161 #CFLAGS+=-iwithprefix include
 162 CFLAGS+=$(shell $(CC) -print-search-dirs | sed -ne "s/install: *\(.*\)/-I\1include/gp")
 163
 164
 165 ifeq ($(strip $(DODEBUG)),y)
 166     CFLAGS += -g
 167     LDFLAGS:= $(CPU_LDFLAGS-y) -shared --warn-common --warn-once -z combreloc
 168     STRIPTOOL:= true -Since_we_are_debugging
 169 else
 170     LDFLAGS := $(CPU_LDFLAGS-y) -s -shared --warn-common --warn-once -z combreloc
 171 endif
 172 ifneq ($(strip $(DOASSERTS)),y)
 173     CFLAGS += -DNDEBUG
 174 endif
 175
 176 ifeq ($(strip $(HAVE_SHARED)),y)
 177     LIBRARY_CACHE:=#-DUSE_CACHE
 178     ifeq ($(strip $(BUILD_UCLIBC_LDSO)),y)
 179         LDSO:=$(TOPDIR)lib/$(UCLIBC_LDSO)
 180         DYNAMIC_LINKER:=$(SHARED_LIB_LOADER_PATH)/$(UCLIBC_LDSO)
 181         BUILD_DYNAMIC_LINKER:=$(shell cd $(TOPDIR) && pwd)/lib/$(UCLIBC_LDSO)
 182     else
 183         LDSO:=$(SYSTEM_LDSO)
 184         DYNAMIC_LINKER:=/lib/$(notdir $(SYSTEM_LDSO))
 185         BUILD_DYNAMIC_LINKER:=/lib/$(notdir $(SYSTEM_LDSO))
 186    endif
 187 endif
 188 ifeq ($(strip $(DOPIC)),y)
 189     CFLAGS += -fPIC
 190 endif
 191 ifeq ($(strip $(UCLIBC_HAS_SOFT_FLOAT)),y)
 192     CFLAGS += $(call check_gcc,-msoft-float,)
 193 endif
 194
 195 LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
 196 LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
 197 LIBGCC_DIR:=$(dir $(LIBGCC))
 198
 199 # TARGET_PREFIX is the directory under which which the uClibc runtime
 200 # environment will be installed and used on the target system.   The
 201 # result will look something like the following:
 202 #   TARGET_PREFIX/
 203 #       lib/            <contains all runtime and static libs>
 204 #       usr/lib/        <this directory is searched for runtime libs>
 205 #       etc/            <weher the shared library cache and configuration
 206 #                       information go if you enabled LIBRARY_CACHE above>
 207 # Very few people will need to change this value from the default...
 208 TARGET_PREFIX = /
 209