# Rules.make for uClibc # # Copyright (C) 2000 by Lineo, inc. # Copyright (C) 2000-2006 Erik Andersen # # Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. # #----------------------------------------------------------- # 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 = $(CROSS)strip INSTALL = install LN = ln RM = rm -f TAR = tar STRIP_FLAGS ?= -x -R .note -R .comment # Select the compiler needed to build binaries for your development system HOSTCC = gcc BUILD_CFLAGS = -O2 -Wall #--------------------------------------------------------- # Nothing beyond this point should ever be touched by mere # mortals. Unless you hang out with the gods, you should # probably leave all this stuff alone. # Pull in the user's uClibc configuration ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),) -include $(top_builddir).config endif # Make certain these contain a final "/", but no "//"s. TARGET_ARCH:=$(shell grep -s '^TARGET_ARCH' $(top_builddir)/.config | sed -e 's/^TARGET_ARCH=//' -e 's/"//g') TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH)))) RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(RUNTIME_PREFIX)))))) DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(DEVEL_PREFIX)))))) KERNEL_SOURCE:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(KERNEL_SOURCE)))))) export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_SOURCE # Now config hard core MAJOR_VERSION := 0 MINOR_VERSION := 9 SUBLEVEL := 28 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 LIBC := libc SHARED_MAJORNAME := $(LIBC).so.$(MAJOR_VERSION) ifneq ($(findstring $(TARGET_ARCH) , hppa64 ia64 mips64 powerpc64 s390x sh64 sparc64 x86_64 ),) UCLIBC_LDSO_NAME := ld64-uClibc else UCLIBC_LDSO_NAME := ld-uClibc endif UCLIBC_LDSO := $(UCLIBC_LDSO_NAME).so.$(MAJOR_VERSION) NONSHARED_LIBNAME := uclibc_nonshared.a libc := $(top_builddir)lib/$(SHARED_MAJORNAME) interp := $(top_builddir)lib/interp.os ldso := $(top_builddir)lib/$(UCLIBC_LDSO) headers_dep := $(top_builddir)include/bits/sysnum.h sub_headers := $(headers_dep) #LIBS :=$(interp) -L$(top_builddir)lib -lc LIBS := $(interp) -L$(top_builddir)lib $(libc:.$(MAJOR_VERSION)=) # Make sure DESTDIR and PREFIX can be used to install # PREFIX is a uClibcism while DESTDIR is a common GNUism ifndef PREFIX PREFIX = $(DESTDIR) endif ifneq ($(HAVE_SHARED),y) libc := interp := ldso := endif ifndef CROSS CROSS=$(subst ",, $(strip $(CROSS_COMPILER_PREFIX))) endif # A nifty macro to make testing gcc features easier check_gcc=$(shell \ if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; \ then echo "$(1)"; else echo "$(2)"; fi) check_as=$(shell \ if $(CC) -Wa,$(1) -Wa,-Z -c -o /dev/null -xassembler /dev/null > /dev/null 2>&1; \ then echo "-Wa,$(1)"; fi) check_ld=$(shell \ if $(LD) $(1) -o /dev/null -b binary /dev/null > /dev/null 2>&1; \ then echo "$(1)"; fi) ARFLAGS:=cr OPTIMIZATION:= # 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,) GCC_MAJOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 1) #GCC_MINOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 2) ifeq ($(GCC_MAJOR_VER),4) # shrinks code, results are from 4.0.2 # 0.36% OPTIMIZATION+=$(call check_gcc,-fno-tree-loop-optimize,) # 0.34% OPTIMIZATION+=$(call check_gcc,-fno-tree-dominator-opts,) # 0.1% OPTIMIZATION+=$(call check_gcc,-fno-strength-reduce,) endif PICFLAG:=-fPIC PIEFLAG_NAME:=-fPIE # Some nice CPU specific optimizations ifeq ($(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,-march=i686) $(call check_gcc,-falign-functions=4,-malign-functions=4) CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686 $(call check_gcc,-falign-functions=0,-malign-functions=0) CPU_CFLAGS-$(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) $(call check_gcc,-falign-functions=0,-malign-functions=0) CPU_CFLAGS-$(CONFIG_NEHEMIAH)+=$(call check_gcc,-march=c3-2,-march=i686) endif ifeq ($(TARGET_ARCH),sparc) CPU_CFLAGS-$(CONFIG_SPARC_V7)+=-mcpu=v7 CPU_CFLAGS-$(CONFIG_SPARC_V8)+=-mcpu=v8 CPU_CFLAGS-$(CONFIG_SPARC_V9)+=-mcpu=v9 CPU_CFLAGS-$(CONFIG_SPARC_V9B)+=$(call check_gcc,-mcpu=v9b,-mcpu=ultrasparc) endif ifeq ($(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_ARM7TDMI)+=-mtune=arm7tdmi -march=armv4 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=armv5 CPU_CFLAGS-$(CONFIG_ARM1136JF_S)+=-mtune=arm1136jf-s -march=armv6 CPU_CFLAGS-$(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 ($(TARGET_ARCH),mips) CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB CPU_CFLAGS-$(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-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32 endif ifeq ($(TARGET_ARCH),nios) CPU_LDFLAGS-y+=-m32 CPU_CFLAGS-y+=-m32 endif ifeq ($(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-$(CONFIG_SH3)+=-m3 ifeq ($(UCLIBC_HAS_FLOATS),y) CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a CPU_CFLAGS-$(CONFIG_SH4)+=-m4 else CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu endif endif ifeq ($(TARGET_ARCH),sh64) OPTIMIZATION+=-fstrict-aliasing CPU_LDFLAGS-$(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 ($(TARGET_ARCH),h8300) CPU_LDFLAGS-$(CONFIG_H8300H)+= -ms8300h CPU_LDFLAGS-$(CONFIG_H8S) += -ms8300s CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32 CPU_CFLAGS-$(CONFIG_H8S) += -ms -mint32 endif ifeq ($(TARGET_ARCH),cris) CPU_LDFLAGS-$(CONFIG_CRIS)+=-mcrislinux CPU_LDFLAGS-$(CONFIG_CRISV32)+=-mcrislinux CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux PICFLAG:=-fpic PIEFLAG_NAME:=-fpie endif ifeq ($(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_NAME:=-fpie endif ifeq ($(TARGET_ARCH),bfin) # This should also work, but why bother ? ;) #PICFLAG:=-fPIC -mid-shared-library PICFLAG:=-fpic endif ifeq ($(TARGET_ARCH),frv) CPU_LDFLAGS-$(CONFIG_FRV)+=-melf32frvfd CPU_CFLAGS-$(CONFIG_FRV)+=-mfdpic # 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. export LDPIEFLAG:=-shared -Bsymbolic UCLIBC_LDSO=ld.so.1 endif # Keep the check_gcc from being needlessly executed ifndef PIEFLAG ifneq ($(UCLIBC_BUILD_PIE),y) export PIEFLAG:= else export PIEFLAG:=$(call check_gcc,$(PIEFLAG_NAME),$(PICFLAG)) endif endif # We need to keep track of both the CC PIE flag (above) as # well as the LD PIE flag (below) because we can't rely on # gcc passing -pie if we used -fPIE ifndef LDPIEFLAG ifneq ($(UCLIBC_BUILD_PIE),y) export LDPIEFLAG:= else export LDPIEFLAG:=$(shell $(LD) --help | grep -q pie && echo "-Wl,-pie") endif endif # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it) ifndef ASNEEDED ifneq ($(UCLIBC_HAS_SSP),y) export ASNEEDED:= else export ASNEEDED:=$(shell (LD_TMP=$(mktemp LD_XXXXXX) ; echo "GROUP ( AS_NEEDED ( /usr/lib/libc.so ) )" > $LD_TMP && if $(LD) -T $LD_TMP -o /dev/null > /dev/null 2>&1; then echo "AS_NEEDED ( $(UCLIBC_LDSO) )"; else echo "$(UCLIBC_LDSO)"; fi; rm -f $LD_TMP ) ) endif endif # Add a bunch of extra pedantic annoyingly strict checks XWARNINGS=$(subst ",, $(strip $(WARNINGS))) -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing ifeq ($(EXTRA_WARNINGS),y) XWARNINGS+=-Wnested-externs -Wshadow -Wmissing-noreturn -Wmissing-format-attribute -Wformat=2 XWARNINGS+=-Wmissing-prototypes -Wmissing-declarations # works only w/ gcc-3.4 and up, can't be checked for gcc-3.x w/ check_gcc() #XWARNINGS+=-Wdeclaration-after-statement endif XARCH_CFLAGS=$(subst ",, $(strip $(ARCH_CFLAGS))) CPU_CFLAGS=$(subst ",, $(strip $(CPU_CFLAGS-y))) 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 := -include $(top_builddir)include/libc-symbols.h \ $(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \ -fno-builtin -nostdinc -I$(top_builddir)include -I. LDADD_LIBFLOAT= ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y) # If -msoft-float isn't supported, we want an error anyway. # Hmm... might need to revisit this for arm since it has 2 different # soft float encodings. ifneq ($(TARGET_ARCH),nios) ifneq ($(TARGET_ARCH),nios2) CFLAGS += -msoft-float endif endif ifeq ($(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 # Make sure "char" behavior is the same everywhere CFLAGS += -fsigned-char # We need this to be checked within libc-symbols.h ifneq ($(HAVE_SHARED),y) CFLAGS += -DSTATIC endif # only i386 is known to work if compile.S gets -D__ASSEMBLER__ #CFLAGS += $(call check_gcc,-std=c99,) LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -shared --warn-common --warn-once -z combreloc LDFLAGS_NOSTRIP+=$(call check_ld,--gc-sections) ifeq ($(UCLIBC_BUILD_RELRO),y) LDFLAGS_NOSTRIP+=-z relro endif ifeq ($(UCLIBC_BUILD_NOW),y) LDFLAGS_NOSTRIP+=-z now endif LDFLAGS:=$(LDFLAGS_NOSTRIP) -z defs ifeq ($(DODEBUG),y) #CFLAGS += -g3 CFLAGS += -O0 -g3 else CFLAGS += $(OPTIMIZATION) $(XARCH_CFLAGS) endif ifeq ($(NOSTRIP),y) STRIPTOOL := true -Stripping_disabled else LDFLAGS += -s endif ifeq ($(DOMULTI),y) # we try to compile all sources at once into an object (IMA), but # gcc-3.3.x does not support it # gcc-3.4.x supports it, but does not need and support --combine. though fails on many sources # gcc-4.0.x supports it, supports the --combine flag, but does not need it # gcc-4.1(200506xx) supports it, but needs the --combine flag, else libs are useless ifeq ($(GCC_MAJOR_VER),3) DOMULTI:=n else CFLAGS+=$(call check_gcc,--combine,) endif else DOMULTI:=n endif ifeq ($(UCLIBC_HAS_THREADS),y) ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y) PTNAME := nptl else ifeq ($(LINUXTHREADS_OLD),y) PTNAME := linuxthreads.old else PTNAME := linuxthreads endif endif PTDIR := $(top_builddir)libpthread/$(PTNAME) # set up system dependencies include dirs (NOTE: order matters!) ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y) PTINC:= -I$(PTDIR) \ -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \ -I$(PTDIR)/sysdeps/$(TARGET_ARCH) \ -I$(PTDIR)/sysdeps/unix/sysv/linux \ -I$(PTDIR)/sysdeps/pthread \ -I$(PTDIR)/sysdeps/pthread/bits \ -I$(PTDIR)/sysdeps/generic \ -I$(top_srcdir)ldso/ldso/$(TARGET_ARCH) \ -I$(top_srcdir)ldso/include # # Test for TLS if NPTL support was selected. # GCC_HAS_TLS=$(shell \ echo "extern __thread int foo;" | $(CC) -o /dev/null -S -xc - 2>&1) ifneq ($(GCC_HAS_TLS),) gcc_tls_test_fail: @echo "####"; @echo "#### Your compiler does not support TLS and you are trying to build uClibc"; @echo "#### with NPTL support. Upgrade your binutils and gcc to versions which"; @echo "#### support TLS for your architecture. Do not contact uClibc maintainers"; @echo "#### about this problem."; @echo "####"; @echo "#### Exiting..."; @echo "####"; @exit 1; endif else PTINC := \ -I$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \ -I$(PTDIR)/sysdeps/$(TARGET_ARCH) \ -I$(PTDIR)/sysdeps/unix/sysv/linux \ -I$(PTDIR)/sysdeps/pthread \ -I$(PTDIR) \ -I$(top_builddir)libpthread endif CFLAGS+=$(PTINC) else PTNAME := PTINC := endif # Sigh, some stupid versions of gcc can't seem to cope with '-iwithprefix include' #CFLAGS+=-iwithprefix include CFLAGS+=-isystem $(shell $(CC) -print-file-name=include) ifneq ($(DOASSERTS),y) CFLAGS+=-DNDEBUG endif # moved from ldso/{ldso,libdl} # BEWARE!!! At least mips* will die if -O0 is used!!! ifeq ($(TARGET_ARCH),mips) CFLAGS:=$(CFLAGS:-O0=-O1) endif # Keep the check_as from being needlessly executed ifndef ASFLAGS_NOEXEC ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y) export ASFLAGS_NOEXEC := $(call check_as,--noexecstack) else export ASFLAGS_NOEXEC := endif endif ASFLAGS = $(ASFLAGS_NOEXEC) LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y) LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name) LIBGCC_DIR:=$(dir $(LIBGCC)) # moved from libpthread/linuxthreads ifeq ($(UCLIBC_CTOR_DTOR),y) SHARED_START_FILES:=$(top_builddir)lib/crti.o $(LIBGCC_DIR)crtbeginS.o SHARED_END_FILES:=$(LIBGCC_DIR)crtendS.o $(top_builddir)lib/crtn.o endif ######################################## # # uClinux shared lib support # ifeq ($(CONFIG_BINFMT_SHARED_FLAT),y) # 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