# Rules.make for uClibc # # Copyright (C) 2000 by Lineo, inc. # Copyright (C) 2000-2002 Erik Andersen # # This program is free software; you can redistribute it and/or modify it under # the terms of the GNU Library General Public License as published by the Free # Software Foundation; either version 2 of the License, or (at your option) any # later version. # # This program is distributed in the hope that it will be useful, but WITHOUT # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS # FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more # details. # # You should have received a copy of the GNU Library General Public License # along with this program; if not, write to the Free Software Foundation, Inc., # 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA #-------------------------------------------------------- # This file contains rules which are shared between multiple Makefiles. # All normal configuration options live in the file named ".config". # Don't mess with this file unless you know what you are doing. #-------------------------------------------------------- # If you are running a cross compiler, you will want to set 'CROSS' # to something more interesting... Target architecture is determined # by asking the CC compiler what arch it compiles things for, so unless # your compiler is broken, you should not need to specify TARGET_ARCH # # Most people will set this stuff on the command line, i.e. # make CROSS=arm-linux- # will build uClibc for 'arm'. ifndef CROSS CROSS= endif CC= $(CROSS)gcc AR= $(CROSS)ar LD= $(CROSS)ld NM= $(CROSS)nm STRIPTOOL= $(CROSS)strip INSTALL= install LN= ln RM= rm -f # Select the compiler needed to build binaries for your development system HOSTCC=gcc HOSTCFLAGS=-O2 -Wall #-------------------------------------------------------- # Nothing beyond this point should ever be touched by mere mortals. # Unless you hang out with the gods, you should probably leave all # this stuff alone. MAJOR_VERSION:=0 MINOR_VERSION:=9 SUBLEVEL:=27 VERSION:=$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL) # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc. LC_ALL:= C export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION LC_ALL SHARED_FULLNAME:=libuClibc-$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL).so SHARED_MAJORNAME:=libc.so.$(MAJOR_VERSION) UCLIBC_LDSO:=ld-uClibc.so.$(MAJOR_VERSION) LIBNAME:=libc.a LIBC:=$(TOPDIR)libc/$(LIBNAME) # Pull in the user's uClibc configuration ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),) -include $(TOPDIR).config endif # A nifty macro to make testing gcc features easier check_gcc=$(shell if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \ then echo "$(1)"; else echo "$(2)"; fi) # Make certain these contain a final "/", but no "//"s. TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH)))) RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(RUNTIME_PREFIX)))))) DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(DEVEL_PREFIX)))))) export RUNTIME_PREFIX DEVEL_PREFIX ARFLAGS:=r OPTIMIZATION:= PICFLAG:=-fPIC PIEFLAG:=$(call check_gcc,-fPIE,) ifeq ($(strip $(PIEFLAG)),-fPIE) LDPIEFLAG:=$(shell $(LD) --help | grep -q pie && echo "-Wl,-pie") endif # Some nice CPU specific optimizations ifeq ($(strip $(TARGET_ARCH)),i386) OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=2,) OPTIMIZATION+=$(call check_gcc,-falign-jumps=0 -falign-loops=0,-malign-jumps=0 -malign-loops=0) CPU_CFLAGS-$(CONFIG_386)+=-march=i386 CPU_CFLAGS-$(CONFIG_486)+=-march=i486 CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486 CPU_CFLAGS-$(CONFIG_586)+=-march=i586 CPU_CFLAGS-$(CONFIG_586MMX)+=$(call check_gcc,-march=pentium-mmx,-march=i586) CPU_CFLAGS-$(CONFIG_686)+=-march=i686 CPU_CFLAGS-$(CONFIG_PENTIUMII)+=$(call check_gcc,-march=pentium2,-march=i686) CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(call check_gcc,-march=pentium3,-march=i686) CPU_CFLAGS-$(CONFIG_PENTIUM4)+=$(call check_gcc,-march=pentium4,-march=i686) CPU_CFLAGS-$(CONFIG_K6)+=$(call check_gcc,-march=k6,-march=i586) CPU_CFLAGS-$(CONFIG_K7)+=$(call check_gcc,-march=athlon,-malign-functions=4 -march=i686) CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686 -malign-functions=0 -malign-jumps=0 -malign-loops=0 CPU_CFLAGS-$(CONFIG_WINCHIPC6)+=$(call check_gcc,-march=winchip-c6,-march=i586) CPU_CFLAGS-$(CONFIG_WINCHIP2)+=$(call check_gcc,-march=winchip2,-march=i586) CPU_CFLAGS-$(CONFIG_CYRIXIII)+=$(call check_gcc,-march=c3,-march=i486) -malign-functions=0 -malign-jumps=0 -malign-loops=0 CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686) endif ifeq ($(strip $(TARGET_ARCH)),arm) OPTIMIZATION+=-fstrict-aliasing CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+= CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3 CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3 CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4 CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4 CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4 CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv4 CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4 CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4 CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110) CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv4 -Wa,-mcpu=xscale endif ifeq ($(strip $(TARGET_ARCH)),mips) CPU_CFLAGS-$(CONFIG_MIPS_ISA_1)+=-mips1 CPU_CFLAGS-$(CONFIG_MIPS_ISA_2)+=-mips2 -mtune=mips2 CPU_CFLAGS-$(CONFIG_MIPS_ISA_3)+=-mips3 -mtune=mips3 CPU_CFLAGS-$(CONFIG_MIPS_ISA_4)+=-mips4 -mtune=mips4 CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS32)+=-mips32 -mtune=mips32 CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32 endif ifeq ($(strip $(TARGET_ARCH)),sh) OPTIMIZATION+=-fstrict-aliasing OPTIMIZATION+= $(call check_gcc,-mprefergot,) CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb CPU_CFLAGS-$(CONFIG_SH2)+=-m2 CPU_CFLAGS-$(CONFIG_SH3)+=-m3 CPU_CFLAGS-$(CONFIG_SH4)+=-m4 endif ifeq ($(strip $(TARGET_ARCH)),sh64) OPTIMIZATION+=-fstrict-aliasing CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):=-EL CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):=-EB CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media endif ifeq ($(strip $(TARGET_ARCH)),h8300) CPU_LDFLAGS-$(CONFIG_H8300H)+= -ms8300h CPU_LDFLAGS-$(CONFIG_H8S) += -ms8300s CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32 -fsigned-char CPU_CFLAGS-$(CONFIG_H8S) += -ms -mint32 -fsigned-char endif ifeq ($(strip $(TARGET_ARCH)),cris) CPU_LDFLAGS-$(CONFIG_CRIS)+=-mcrislinux CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux PICFLAG:=-fpic PIEFLAG:=$(call check_gcc,-fpie,) endif ifeq ($(strip $(TARGET_ARCH)),powerpc) # PowerPC can hold 8192 entries in its GOT with -fpic which is more than # enough. Therefore use -fpic which will reduce code size and generates # faster code. PICFLAG:=-fpic PIEFLAG:=$(call check_gcc,-fpie,) endif ifeq ($(strip $(TARGET_ARCH)),frv) CPU_LDFLAGS-$(CONFIG_FRV)+=-melf32frvfd CPU_CFLAGS-$(CONFIG_FRV)+=-mfdpic PICFLAG=-fPIC -DPIC # Using -pie causes the program to have an interpreter, which is # forbidden, so we must make do with -shared. Unfortunately, # -shared by itself would get us global function descriptors # and calls through PLTs, dynamic resolution of symbols, etc, # which would break as well, but -Bsymbolic comes to the rescue. LDPIEFLAG=-shared -Bsymbolic UCLIBC_LDSO=ld.so.1 endif # Use '-Os' optimization if available, else use -O2, allow Config to override OPTIMIZATION+=$(call check_gcc,-Os,-O2) # Use the gcc 3.4 -funit-at-a-time optimization when available OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,) # Add a bunch of extra pedantic annoyingly strict checks XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing XARCH_CFLAGS=$(subst ",, $(strip $(ARCH_CFLAGS))) CPU_CFLAGS=$(subst ",, $(strip $(CPU_CFLAGS-y))) LDADD_LIBFLOAT= ifeq ($(strip $(UCLIBC_HAS_SOFT_FLOAT)),y) # Add -msoft-float to the CPU_FLAGS since ldso and libdl ignore CFLAGS. # If -msoft-float isn't supported, we want an error anyway. # Hmm... might need to revisit this for arm since it has 2 different # soft float encodings. # msoft-float changes m68k target arch, do not add it ifneq ($(strip $(TARGET_ARCH)),m68k) CPU_CFLAGS += -msoft-float endif ifeq ($(strip $(TARGET_ARCH)),arm) # No longer needed with current toolchains, but leave it here for now. # If anyone is actually still using gcc 2.95 (say), they can uncomment it. # LDADD_LIBFLOAT=-lfloat endif endif ifneq ($(UCLIBC_BUILD_PIE),y) PIEFLAG= LDPIEFLAG= endif SSP_DISABLE_FLAGS=$(call check_gcc,-fno-stack-protector,) ifeq ($(UCLIBC_BUILD_SSP),y) SSP_CFLAGS=$(call check_gcc,-fno-stack-protector-all,) SSP_CFLAGS+=$(call check_gcc,-fstack-protector,) SSP_ALL_CFLAGS=$(call check_gcc,-fstack-protector-all,) else SSP_CFLAGS=$(SSP_DISABLE_FLAGS) endif # Some nice CFLAGS to work with CFLAGS=$(XWARNINGS) $(OPTIMIZATION) $(XARCH_CFLAGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \ -fno-builtin -nostdinc -D_LIBC -I$(TOPDIR)include -I. ifeq ($(DODEBUG),y) #CFLAGS += -g3 CFLAGS = $(XWARNINGS) -O0 -g3 $(CPU_CFLAGS) $(SSP_CFLAGS) \ -fno-builtin -nostdinc -D_LIBC -I$(TOPDIR)include -I. LDFLAGS:= $(CPU_LDFLAGS-y) -shared --warn-common --warn-once -z combreloc STRIPTOOL:= true -Since_we_are_debugging else LDFLAGS := $(CPU_LDFLAGS-y) -shared --warn-common --warn-once -z combreloc endif ifeq ($(UCLIBC_BUILD_RELRO),y) LDFLAGS+=-z relro endif ifeq ($(UCLIBC_BUILD_NOW),y) LDFLAGS+=-z now endif # Sigh, some stupid versions of gcc can't seem to cope with '-iwithprefix include' #CFLAGS+=-iwithprefix include CFLAGS+=-isystem $(shell $(CC) -print-file-name=include || echo) ifneq ($(DOASSERTS),y) CFLAGS += -DNDEBUG endif ifeq ($(HAVE_SHARED),y) ifeq ($(BUILD_UCLIBC_LDSO),y) LDSO:=$(TOPDIR)lib/$(UCLIBC_LDSO) DYNAMIC_LINKER:=$(SHARED_LIB_LOADER_PREFIX)/$(UCLIBC_LDSO) else LDSO:=$(SYSTEM_LDSO) DYNAMIC_LINKER:=/lib/$(strip $(subst ",, $(notdir $(SYSTEM_LDSO)))) endif endif CFLAGS_NOPIC:=$(CFLAGS) ifeq ($(DOPIC),y) CFLAGS += $(PICFLAG) endif ASFLAGS = $(CFLAGS) ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y) check_as_noexecstack=$(shell if $(LD) --help | grep -q "z noexecstack"; then echo "-Wa,--noexecstack"; fi) ASFLAGS += $(check_as_noexecstack) endif LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y) LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name || echo) LIBGCC_DIR:=$(dir $(LIBGCC)) ######################################## # # uClinux shared lib support # ifeq ($(CONFIG_BINFMT_SHARED_FLAT),y) ifndef DISABLE_SHARED_LIBS # For the shared version of this, we specify no stack and its library ID FLTFLAGS += -s 0 LIBID=1 export LIBID FLTFLAGS SHARED_TARGET = lib/libc endif endif TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH))))