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phoenix |
# Rules.make for uClibc
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#
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# Copyright (C) 2000 by Lineo, inc.
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# Copyright (C) 2000-2002 Erik Andersen
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#
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# This program is free software; you can redistribute it and/or modify it under
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# the terms of the GNU Library General Public License as published by the Free
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# Software Foundation; either version 2 of the License, or (at your option) any
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# later version.
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#
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# This program is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Library General Public License
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# along with this program; if not, write to the Free Software Foundation, Inc.,
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# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#--------------------------------------------------------
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# This file contains rules which are shared between multiple Makefiles.
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# All normal configuration options live in the file named ".config".
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# Don't mess with this file unless you know what you are doing.
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#--------------------------------------------------------
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# If you are running a cross compiler, you will want to set 'CROSS'
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# to something more interesting... Target architecture is determined
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# by asking the CC compiler what arch it compiles things for, so unless
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# your compiler is broken, you should not need to specify TARGET_ARCH
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#
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# Most people will set this stuff on the command line, i.e.
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# make CROSS=arm-linux-
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# will build uClibc for 'arm'.
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ifndef CROSS
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CROSS=
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endif
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CC= $(CROSS)gcc
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AR= $(CROSS)ar
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LD= $(CROSS)ld
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NM= $(CROSS)nm
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STRIPTOOL= $(CROSS)strip
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INSTALL= install
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LN= ln
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RM= rm -f
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# Select the compiler needed to build binaries for your development system
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HOSTCC=gcc
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HOSTCFLAGS=-O2 -Wall
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#--------------------------------------------------------
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# Nothing beyond this point should ever be touched by mere mortals.
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# Unless you hang out with the gods, you should probably leave all
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# this stuff alone.
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MAJOR_VERSION:=0
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MINOR_VERSION:=9
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SUBLEVEL:=26
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VERSION:=$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
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# Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc.
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LC_ALL:= C
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export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION LC_ALL
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SHARED_FULLNAME:=libuClibc-$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL).so
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SHARED_MAJORNAME:=libc.so.$(MAJOR_VERSION)
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UCLIBC_LDSO:=ld-uClibc.so.$(MAJOR_VERSION)
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LIBNAME:=libc.a
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LIBC:=$(TOPDIR)libc/$(LIBNAME)
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# Pull in the user's uClibc configuration
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ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),)
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-include $(TOPDIR).config
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endif
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# A nifty macro to make testing gcc features easier
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check_gcc=$(shell if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \
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then echo "$(1)"; else echo "$(2)"; fi)
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# Make certain these contain a final "/", but no "//"s.
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TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH))))
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RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(RUNTIME_PREFIX))))))
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DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(DEVEL_PREFIX))))))
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export RUNTIME_PREFIX DEVEL_PREFIX
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ARFLAGS:=r
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OPTIMIZATION:=
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PICFLAG:=-fPIC
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# Some nice CPU specific optimizations
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ifeq ($(strip $(TARGET_ARCH)),i386)
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OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,)
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OPTIMIZATION+=$(call check_gcc,-falign-jumps=0 -falign-loops=0,-malign-jumps=0 -malign-loops=0)
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CPU_CFLAGS-$(CONFIG_386)+=-march=i386
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CPU_CFLAGS-$(CONFIG_486)+=-march=i486
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CPU_CFLAGS-$(CONFIG_586)+=-march=i586
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CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586)
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CPU_CFLAGS-$(CONFIG_686)+=-march=i686
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CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686)
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CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686)
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CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586)
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CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-malign-functions=4 -march=i686)
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CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686 -malign-functions=0 -malign-jumps=0 -malign-loops=0
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CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586)
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CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586)
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CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i586)
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endif
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ifeq ($(strip $(TARGET_ARCH)),arm)
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OPTIMIZATION+=-fstrict-aliasing
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CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
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CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
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CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
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CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
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CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
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CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
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CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
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CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4
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CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4
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CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4
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CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv4
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CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
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CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
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CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
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CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv4 -Wa,-mcpu=xscale
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endif
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ifeq ($(strip $(TARGET_ARCH)),mips)
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CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1
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CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2
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CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3
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CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4
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CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32
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CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
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endif
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ifeq ($(strip $(TARGET_ARCH)),sh)
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OPTIMIZATION+=-fstrict-aliasing
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OPTIMIZATION+= $(call check_gcc,-mprefergot,)
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CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
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CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
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CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
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CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
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CPU_CFLAGS-$(CONFIG_SH2)+=-m2
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CPU_CFLAGS-$(CONFIG_SH3)+=-m3
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CPU_CFLAGS-$(CONFIG_SH4)+=-m4
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endif
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ifeq ($(strip $(TARGET_ARCH)),sh64)
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OPTIMIZATION+=-fstrict-aliasing
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CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):=-EL
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CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):=-EB
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CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml
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CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb
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CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media
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endif
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ifeq ($(strip $(TARGET_ARCH)),h8300)
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CPU_LDFLAGS-$(CONFIG_H8300H)+= -ms8300h
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CPU_LDFLAGS-$(CONFIG_H8S) += -ms8300s
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CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32 -fsigned-char
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CPU_CFLAGS-$(CONFIG_H8S) += -ms -mint32 -fsigned-char
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endif
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ifeq ($(strip $(TARGET_ARCH)),cris)
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CPU_LDFLAGS-$(CONFIG_CRIS)+=-mcrislinux
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CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
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PICFLAG=-fpic
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endif
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# use '-Os' optimization if available, else use -O2, allow Config to override
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OPTIMIZATION+=$(call check_gcc,-Os,-O2)
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# Add a bunch of extra pedantic annoyingly strict checks
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XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing
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XARCH_CFLAGS=$(subst ",, $(strip $(ARCH_CFLAGS)))
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CPU_CFLAGS=$(subst ",, $(strip $(CPU_CFLAGS-y)))
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LDADD_LIBFLOAT=
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ifeq ($(strip $(UCLIBC_HAS_SOFT_FLOAT)),y)
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# Add -msoft-float to the CPU_FLAGS since ldso and libdl ignore CFLAGS.
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# If -msoft-float isn't supported, we want an error anyway.
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CPU_CFLAGS += -msoft-float
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ifeq ($(strip $(TARGET_ARCH)),arm)
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LDADD_LIBFLOAT=-lfloat
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endif
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endif
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# Some nice CFLAGS to work with
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CFLAGS=$(XWARNINGS) $(OPTIMIZATION) $(XARCH_CFLAGS) $(CPU_CFLAGS) \
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-fno-builtin -nostdinc -D_LIBC -I$(TOPDIR)include -I.
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ifeq ($(DODEBUG),y)
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#CFLAGS += -g3
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CFLAGS = $(XWARNINGS) -O0 -g3 $(CPU_CFLAGS) -fno-builtin -nostdinc -D_LIBC -I$(TOPDIR)include -I.
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LDFLAGS:= $(CPU_LDFLAGS-y) -shared --warn-common --warn-once -z combreloc
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STRIPTOOL:= true -Since_we_are_debugging
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else
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LDFLAGS := $(CPU_LDFLAGS-y) -s -shared --warn-common --warn-once -z combreloc
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endif
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# Sigh, some stupid versions of gcc can't seem to cope with '-iwithprefix include'
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#CFLAGS+=-iwithprefix include
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CFLAGS+=$(shell $(CC) -print-search-dirs | sed -ne "s/install: *\(.*\)/-I\1include/gp")
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ifneq ($(DOASSERTS),y)
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CFLAGS += -DNDEBUG
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endif
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ifeq ($(HAVE_SHARED),y)
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LIBRARY_CACHE:=#-DUSE_CACHE
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ifeq ($(BUILD_UCLIBC_LDSO),y)
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LDSO:=$(TOPDIR)lib/$(UCLIBC_LDSO)
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DYNAMIC_LINKER:=$(SHARED_LIB_LOADER_PREFIX)/$(UCLIBC_LDSO)
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else
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LDSO:=$(SYSTEM_LDSO)
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DYNAMIC_LINKER:=/lib/$(strip $(subst ",, $(notdir $(SYSTEM_LDSO))))
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endif
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endif
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CFLAGS_NOPIC:=$(CFLAGS)
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ifeq ($(DOPIC),y)
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CFLAGS += $(PICFLAG)
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endif
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LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y)
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LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)
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LIBGCC_DIR:=$(dir $(LIBGCC))
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########################################
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#
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# uClinux shared lib support
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#
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ifeq ($(CONFIG_BINFMT_SHARED_FLAT),y)
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# For the shared version of this, we specify no stack and its library ID
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FLTFLAGS += -s 0
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LIBID=1
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export LIBID FLTFLAGS
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SHARED_TARGET = lib/libc
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endif
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TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH))))
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