| # Rules.make for uClibc |
| # |
| # Copyright (C) 2000-2008 Erik Andersen <andersen@uclibc.org> |
| # |
| # Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. |
| # |
| |
| # make nano-doc |
| # FOO = bar -- recursively expanded variable. Value is remebered verbatim. |
| # If it contains references to other variables, these references |
| # are expanded whenever this variable is _substituted_. |
| # FOO := bar -- simply expanded variable. Right hand is expanded when |
| # the variable is _defined_. Therefore faster than =. |
| # FOO ?= bar -- set a value only if it is not already set |
| # (behaves as =, not :=). |
| # FOO += bar -- append; if FOO is not defined, acts like = (not :=). |
| |
| |
| # check for proper make version |
| ifneq ($(findstring x3.7,x$(MAKE_VERSION)),) |
| $(error Your make is too old $(MAKE_VERSION). Go get at least 3.80) |
| endif |
| |
| #----------------------------------------------------------- |
| # 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_COMPILE' 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_COMPILE=arm-linux- |
| # will build uClibc for 'arm'. |
| # CROSS is still supported for backward compatibily only |
| |
| CROSS_COMPILE ?= $(CROSS) |
| |
| CC = $(CROSS_COMPILE)gcc |
| AR = $(CROSS_COMPILE)ar |
| LD = $(CROSS_COMPILE)ld |
| NM = $(CROSS_COMPILE)nm |
| OBJDUMP = $(CROSS_COMPILE)objdump |
| STRIPTOOL = $(CROSS_COMPILE)strip |
| |
| INSTALL = install |
| LN = ln |
| RM = rm -f |
| TAR = tar |
| SED = sed |
| AWK = awk |
| |
| STRIP_FLAGS ?= -x -R .note -R .comment |
| |
| ## unused? if yes, remove after 0.9.31 |
| ## UNIFDEF := $(top_builddir)extra/scripts/unifdef |
| |
| # Select the compiler needed to build binaries for your development system |
| HOSTCC = gcc |
| BUILD_CFLAGS = -Os -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. |
| |
| # strip quotes |
| qstrip = $(strip $(subst ",,$(1))) |
| #")) |
| |
| # Pull in the user's uClibc configuration |
| ifeq ($(filter $(noconfig_targets),$(MAKECMDGOALS)),) |
| -include $(top_builddir).config |
| endif |
| TARGET_ARCH:=$(call qstrip,$(TARGET_ARCH)) |
| ifeq ($(TARGET_ARCH),) |
| ARCH ?= $(shell uname -m | $(SED) -e s/i.86/i386/ \ |
| -e s/sun.*/sparc/ -e s/sparc.*/sparc/ \ |
| -e s/arm.*/arm/ -e s/sa110/arm/ \ |
| -e s/sh.*/sh/ \ |
| -e s/s390x/s390/ -e s/parisc.*/hppa/ \ |
| -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \ |
| -e s/xtensa.*/xtensa/ ) |
| else |
| ARCH = $(TARGET_ARCH) |
| endif |
| export ARCH |
| |
| # Make certain these contain a final "/", but no "//"s. |
| TARGET_SUBARCH:=$(call qstrip,$(TARGET_SUBARCH)) |
| RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(call qstrip,$(RUNTIME_PREFIX))))) |
| DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(call qstrip,$(DEVEL_PREFIX))))) |
| MULTILIB_DIR:=$(strip $(subst //,/, $(subst ,/, $(call qstrip,$(MULTILIB_DIR))))) |
| KERNEL_HEADERS:=$(strip $(subst //,/, $(subst ,/, $(call qstrip,$(KERNEL_HEADERS))))) |
| export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_HEADERS MULTILIB_DIR |
| |
| |
| # Now config hard core |
| MAJOR_VERSION := 0 |
| MINOR_VERSION := 9 |
| SUBLEVEL := 33 |
| EXTRAVERSION :=.2 |
| VERSION := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL) |
| ABI_VERSION := $(MAJOR_VERSION) |
| ifneq ($(EXTRAVERSION),) |
| VERSION := $(VERSION)$(EXTRAVERSION) |
| endif |
| # Ensure consistent sort order, 'gcc -print-search-dirs' behavior, etc. |
| LC_ALL := C |
| export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION ABI_VERSION LC_ALL |
| |
| LIBC := libc |
| SHARED_LIBNAME := $(LIBC).so.$(ABI_VERSION) |
| UBACKTRACE_DSO := libubacktrace.so.$(ABI_VERSION) |
| ifneq ($(findstring $(TARGET_ARCH) , hppa64 ia64 mips64 powerpc64 s390x sparc64 x86_64 ),) |
| UCLIBC_LDSO_NAME := ld64-uClibc |
| ARCH_NATIVE_BIT := 64 |
| else |
| UCLIBC_LDSO_NAME := ld-uClibc |
| ARCH_NATIVE_BIT := 32 |
| endif |
| UCLIBC_LDSO := $(UCLIBC_LDSO_NAME).so.$(ABI_VERSION) |
| NONSHARED_LIBNAME := uclibc_nonshared.a |
| libc := $(top_builddir)lib/$(SHARED_LIBNAME) |
| libc.depend := $(top_builddir)lib/$(SHARED_LIBNAME:.$(ABI_VERSION)=) |
| ifneq ($(ARCH_HAS_NO_SHARED),y) |
| libdl.depend := $(top_builddir)lib/libdl.so |
| endif |
| ifneq ($(HAS_NO_THREADS),y) |
| libpthread.depend := $(top_builddir)lib/libpthread.so |
| endif |
| 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 $(libc:.$(ABI_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 |
| |
| comma:=, |
| space:= # |
| |
| ifeq ($(CROSS_COMPILE),) |
| CROSS_COMPILE=$(call qstrip,$(CROSS_COMPILER_PREFIX)) |
| endif |
| |
| # A nifty macro to make testing gcc features easier |
| check_gcc=$(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) |
| |
| # Use variable indirection here so that we can have variable |
| # names with fun chars in them like equal signs |
| define check-tool-var |
| ifeq ($(filter $(clean_targets) CLEAN_%,$(MAKECMDGOALS)),) |
| _v = $(2)_$(3) |
| ifndef $$(_v) |
| $$(_v) := $$(call $(1),$(subst %, ,$(3))) |
| export $$(_v) |
| endif |
| endif |
| endef |
| |
| # Usage: check-gcc-var,<flag> |
| # Check the C compiler to see if it supports <flag>. |
| # Export the variable CFLAG_<flag> if it does. |
| define check-gcc-var |
| $(call check-tool-var,check_gcc,CFLAG,$(1)) |
| endef |
| # Usage: check-as-var,<flag> |
| # Check the assembler to see if it supports <flag>. Export the |
| # variable ASFLAG_<flag> if it does (for invoking the assembler), |
| # as well CFLAG_-Wa<flag> (for invoking the compiler driver). |
| define check-as-var |
| $(call check-tool-var,check_as,ASFLAG,$(1)) |
| _v = CFLAG_-Wa$(1) |
| export $$(_v) = $$(if $$(ASFLAG_$(1)),-Wa$$(comma)$$(ASFLAG_$(1))) |
| endef |
| # Usage: check-ld-var,<flag> |
| # Check the linker to see if it supports <flag>. Export the |
| # variable LDFLAG_<flag> if it does (for invoking the linker), |
| # as well CFLAG_-Wl<flag> (for invoking the compiler driver). |
| define check-ld-var |
| $(call check-tool-var,check_ld,LDFLAG,$(1)) |
| _v = CFLAG_-Wl$(1) |
| export $$(_v) = $$(if $$(LDFLAG_$(1)),-Wl$$(comma)$$(LDFLAG_$(1))) |
| endef |
| # Usage: cache-output-var,<variable>,<shell command> |
| # Execute <shell command> and cache the output in <variable>. |
| define cache-output-var |
| ifndef $(1) |
| $(1) := $$(shell $(2)) |
| export $(1) |
| endif |
| endef |
| |
| |
| ARFLAGS:=cr |
| |
| |
| # Flags in OPTIMIZATION are used only for non-debug builds |
| |
| OPTIMIZATION:= |
| # Use '-Os' optimization if available, else use -O2, allow Config to override |
| ifneq ($(TARGET_ARCH),m68k) |
| $(eval $(call check-gcc-var,-Os)) |
| ifneq ($(CFLAG_-Os),) |
| OPTIMIZATION += $(CFLAG_-Os) |
| else |
| $(eval $(call check-gcc-var,-O2)) |
| OPTIMIZATION += $(CFLAG_-O2) |
| endif |
| endif |
| # Use the gcc 3.4 -funit-at-a-time optimization when available |
| $(eval $(call check-gcc-var,-funit-at-a-time)) |
| OPTIMIZATION += $(CFLAG_-funit-at-a-time) |
| # shrinks code by about 0.1% |
| $(eval $(call check-gcc-var,-fmerge-all-constants)) |
| $(eval $(call check-gcc-var,-fstrict-aliasing)) |
| OPTIMIZATION += $(CFLAG_-fmerge-all-constants) $(CFLAG_-fstrict-aliasing) |
| |
| $(eval $(call cache-output-var,GCC_VER,$(CC) -dumpversion)) |
| GCC_VER := $(subst ., ,$(GCC_VER)) |
| GCC_MAJOR_VER ?= $(word 1,$(GCC_VER)) |
| #GCC_MINOR_VER ?= $(word 2,$(GCC_VER)) |
| |
| ifeq ($(GCC_MAJOR_VER),4) |
| # shrinks code, results are from 4.0.2 |
| # 0.36% |
| $(eval $(call check-gcc-var,-fno-tree-loop-optimize)) |
| OPTIMIZATION += $(CFLAG_-fno-tree-loop-optimize) |
| # 0.34% |
| $(eval $(call check-gcc-var,-fno-tree-dominator-opts)) |
| OPTIMIZATION += $(CFLAG_-fno-tree-dominator-opts) |
| # 0.1% |
| $(eval $(call check-gcc-var,-fno-strength-reduce)) |
| OPTIMIZATION += $(CFLAG_-fno-strength-reduce) |
| endif |
| |
| |
| # CPU_CFLAGS-y contain options which are not warnings, |
| # not include or library paths, and not optimizations. |
| |
| # Why -funsigned-char: I hunted a bug related to incorrect |
| # sign extension of 'char' type for 10 hours straight. Not fun. |
| CPU_CFLAGS-y := -funsigned-char -fno-builtin |
| |
| $(eval $(call check-gcc-var,-fno-asm)) |
| CPU_CFLAGS-y += $(CFLAG_-fno-asm) |
| |
| LDADD_LIBFLOAT= |
| ifeq ($(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) |
| ifneq ($(TARGET_ARCH),sh) |
| ifneq ($(TARGET_ARCH),c6x) |
| CPU_CFLAGS-y += -msoft-float |
| endif |
| endif |
| 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 |
| |
| $(eval $(call check-gcc-var,-std=gnu99)) |
| CPU_CFLAGS-y += $(CFLAG_-std=gnu99) |
| |
| CPU_CFLAGS-$(UCLIBC_FORMAT_SHARED_FLAT) += -mid-shared-library |
| CPU_CFLAGS-$(UCLIBC_FORMAT_FLAT_SEP_DATA) += -msep-data |
| |
| CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN) += -Wl,-EL |
| CPU_LDFLAGS-$(ARCH_BIG_ENDIAN) += -Wl,-EB |
| |
| PICFLAG-y := -fPIC |
| PICFLAG-$(UCLIBC_FORMAT_FDPIC_ELF) := -mfdpic |
| PICFLAG-$(UCLIBC_FORMAT_DSBT_ELF) := -mdsbt -fpic |
| PICFLAG := $(PICFLAG-y) |
| PIEFLAG_NAME:=-fPIE |
| |
| # Some nice CPU specific optimizations |
| ifeq ($(TARGET_ARCH),i386) |
| $(eval $(call check-gcc-var,-fomit-frame-pointer)) |
| OPTIMIZATION += $(CFLAG_-fomit-frame-pointer) |
| |
| ifeq ($(CONFIG_386)$(CONFIG_486)$(CONFIG_586)$(CONFIG_586MMX),y) |
| # Non-SSE capable processor. |
| # NB: this may make SSE insns segfault! |
| # -O1 -march=pentium3, -Os -msse etc are known to be affected. |
| # See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13685 |
| # -m32 is needed if host is 64-bit |
| OPTIMIZATION+=$(call check_gcc,-m32 -mpreferred-stack-boundary=2,) |
| else |
| $(eval $(call check-gcc-var,-mpreferred-stack-boundary=4)) |
| OPTIMIZATION += $(CFLAG_-mpreferred-stack-boundary=4) |
| endif |
| |
| # Choice of alignment (please document why!) |
| # -falign-labels: in-line labels |
| # (reachable by normal code flow, aligning will insert nops |
| # which will be executed - may even make things slower) |
| # -falign-jumps: reachable only by a jump |
| # Generic: no alignment at all (smallest code) |
| GCC_FALIGN=$(call check_gcc,-falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1,-malign-jumps=1 -malign-loops=1) |
| ifeq ($(CONFIG_K7),y) |
| # Align functions to four bytes, use default for jumps and loops (why?) |
| GCC_FALIGN=$(call check_gcc,-falign-functions=4 -falign-labels=1,-malign-functions=4) |
| endif |
| ifeq ($(CONFIG_CRUSOE),y) |
| # Use compiler's default for functions, jumps and loops (why?) |
| GCC_FALIGN=$(call check_gcc,-falign-functions=0 -falign-labels=1,-malign-functions=0) |
| endif |
| ifeq ($(CONFIG_CYRIXIII),y) |
| # Use compiler's default for functions, jumps and loops (why?) |
| GCC_FALIGN=$(call check_gcc,-falign-functions=0 -falign-labels=1,-malign-functions=0) |
| endif |
| OPTIMIZATION+=$(GCC_FALIGN) |
| |
| # Putting each function and data object into its own section |
| # allows for kbytes of less text if users link against static uclibc |
| # using ld --gc-sections. |
| # ld 2.18 can't do that (yet?) for shared libraries, so we itself |
| # do not use --gc-sections at shared lib link time. |
| # However, in combination with sections being sorted by alignment |
| # it does result in much reduced padding: |
| # text data bss dec hex |
| # 235319 1472 5992 242783 3b45f old.so |
| # 234104 1472 5980 241556 3af94 new.so |
| # Without -ffunction-sections, all functions will get aligned |
| # to 4 byte boundary by as/ld. This is arguably a bug in as. |
| # It specifies 4 byte align for .text even if not told to do so: |
| # Idx Name Size VMA LMA File off Algn |
| # 0 .text xxxxxxxx 00000000 00000000 xxxxxxxx 2**2 <===! |
| CPU_CFLAGS-y += $(CFLAG_-ffunction-sections) $(CFLAG_-fdata-sections) |
| CPU_LDFLAGS-y += $(CFLAG_-Wl--sort-common) |
| $(eval $(call check-ld-var,--sort-section=alignment)) |
| CPU_LDFLAGS-y += $(CFLAG_-Wl--sort-section=alignment) |
| |
| CPU_LDFLAGS-y+=-m32 |
| CPU_CFLAGS-y+=-m32 |
| CPU_CFLAGS-$(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) |
| CPU_CFLAGS-$(CONFIG_CRUSOE)+=-march=i686 |
| CPU_CFLAGS-$(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)+=$(call check_gcc,-march=c3,-march=i486) |
| CPU_CFLAGS-$(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) |
| CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian |
| CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian |
| CPU_CFLAGS-$(COMPILE_IN_THUMB_MODE)+=-mthumb |
| endif |
| |
| ifeq ($(TARGET_ARCH),mips) |
| OPTIMIZATION+=-mno-split-addresses |
| 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_MIPS32R2)+=-march=mips32r2 -mtune=mips32r2 |
| CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32 |
| ifeq ($(strip $(ARCH_BIG_ENDIAN)),y) |
| CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64btsmip |
| CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32btsmip |
| endif |
| ifeq ($(strip $(ARCH_LITTLE_ENDIAN)),y) |
| CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-Wl,-melf64ltsmip |
| CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-Wl,-melf32ltsmip |
| endif |
| CPU_CFLAGS-$(CONFIG_MIPS_N64_ABI)+=-mabi=64 |
| CPU_CFLAGS-$(CONFIG_MIPS_O32_ABI)+=-mabi=32 |
| CPU_CFLAGS-$(CONFIG_MIPS_N32_ABI)+=-mabi=n32 |
| endif |
| |
| ifeq ($(TARGET_ARCH),nios) |
| OPTIMIZATION+=-funaligned-struct-hack |
| CPU_LDFLAGS-y+=-Wl,-m32 |
| CPU_CFLAGS-y+=-Wl,-m32 |
| endif |
| |
| ifeq ($(TARGET_ARCH),sh) |
| $(eval $(call check-gcc-var,-mprefergot)) |
| OPTIMIZATION += $(CFLAG_-mprefergot) |
| CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml |
| CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb |
| CPU_CFLAGS-$(CONFIG_SH2)+=-m2 |
| CPU_CFLAGS-$(CONFIG_SH3)+=-m3 |
| ifeq ($(UCLIBC_HAS_FPU),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 ($(TARGET_ARCH),sh64) |
| CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN):=-ml |
| CPU_CFLAGS-$(ARCH_BIG_ENDIAN):=-mb |
| CPU_CFLAGS-$(CONFIG_SH5)+=-m5-32media |
| endif |
| |
| ifeq ($(TARGET_ARCH),h8300) |
| SYMBOL_PREFIX=_ |
| CPU_LDFLAGS-$(CONFIG_H8300H)+= -Wl,-ms8300h |
| CPU_LDFLAGS-$(CONFIG_H8S) += -Wl,-ms8300s |
| CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32 |
| CPU_CFLAGS-$(CONFIG_H8S) += -ms -mint32 |
| endif |
| |
| ifeq ($(TARGET_ARCH),i960) |
| OPTIMIZATION+=-mh -mint32 #-fsigned-char |
| endif |
| |
| ifeq ($(TARGET_ARCH),e1) |
| OPTIMIZATION+=-mgnu-param |
| endif |
| |
| ifeq ($(TARGET_ARCH),cris) |
| CPU_LDFLAGS-$(CONFIG_CRIS)+=-Wl,-mcrislinux |
| CPU_LDFLAGS-$(CONFIG_CRISV32)+=-Wl,-mcrislinux |
| CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux |
| PICFLAG:=-fpic |
| PIEFLAG_NAME:=-fpie |
| endif |
| |
| ifeq ($(TARGET_ARCH),m68k) |
| # -fPIC is only supported for 68020 and above. It is not supported |
| # for 68000, 68010, or Coldfire. |
| PICFLAG:=-fpic |
| PIEFLAG_NAME:=-fpie |
| endif |
| |
| ifeq ($(TARGET_ARCH),powerpc) |
| # PowerPC can hold 8192 entries in its GOT with -fpic which is more than |
| # enough. Therefore use -fpic which will reduce code size and generates |
| # faster code. |
| PICFLAG:=-fpic |
| PIEFLAG_NAME:=-fpie |
| PPC_HAS_REL16:=$(shell echo -e "\t.text\n\taddis 11,30,_GLOBAL_OFFSET_TABLE_-.@ha" | $(CC) -c -x assembler -o /dev/null - 2> /dev/null && echo -n y || echo -n n) |
| CPU_CFLAGS-$(PPC_HAS_REL16)+= -DHAVE_ASM_PPC_REL16 |
| CPU_CFLAGS-$(CONFIG_E500) += "-D__NO_MATH_INLINES" |
| |
| endif |
| |
| ifeq ($(TARGET_ARCH),bfin) |
| SYMBOL_PREFIX=_ |
| ifeq ($(UCLIBC_FORMAT_FDPIC_ELF),y) |
| CPU_CFLAGS-y:=-mfdpic |
| CPU_LDFLAGS-y += -Wl,-melf32bfinfd |
| PICFLAG:=-fpic |
| PIEFLAG_NAME:=-fpie |
| endif |
| ifeq ($(UCLIBC_FORMAT_SHARED_FLAT),y) |
| PICFLAG := -mleaf-id-shared-library |
| endif |
| endif |
| |
| ifeq ($(TARGET_ARCH),frv) |
| CPU_LDFLAGS-$(CONFIG_FRV)+=-Wl,-melf32frvfd |
| # 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 -Wl,-Bsymbolic |
| UCLIBC_LDSO=ld.so.1 |
| endif |
| |
| ifeq ($(strip $(TARGET_ARCH)),avr32) |
| CPU_CFLAGS-$(CONFIG_AVR32_AP7) += -march=ap |
| CPU_CFLAGS-$(CONFIG_LINKRELAX) += -mrelax |
| CPU_LDFLAGS-$(CONFIG_LINKRELAX) += --relax |
| endif |
| |
| ifeq ($(TARGET_ARCH),i960) |
| SYMBOL_PREFIX=_ |
| endif |
| |
| ifeq ($(TARGET_ARCH),v850) |
| SYMBOL_PREFIX=_ |
| endif |
| |
| ifeq ($(TARGET_ARCH),c6x) |
| PIEFLAG:= |
| CPU_CFLAGS-$(CONFIG_TMS320C64X) += -march=c64x |
| CPU_CFLAGS-$(CONFIG_TMS320C64XPLUS) += -march=c64x+ |
| CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian |
| CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian |
| CPU_LDFLAGS-y += $(CPU_CFLAGS) |
| endif |
| |
| $(eval $(call check-gcc-var,$(PIEFLAG_NAME))) |
| PIEFLAG := $(CFLAG_$(PIEFLAG_NAME)) |
| ifeq ($(PIEFLAG),) |
| PIEFLAG := $(PICFLAG) |
| 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. We need to directly use -pie |
| # instead of -Wl,-pie as gcc picks up the wrong startfile/endfile |
| $(eval $(call cache-output-var,LDPIEFLAG,$(LD) --help 2>/dev/null | grep -q -- -pie && echo "-pie")) |
| |
| # Check for --as-needed support in linker |
| ifndef LD_FLAG_ASNEEDED |
| _LD_FLAG_ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -- --as-needed) |
| ifneq ($(_LD_FLAG_ASNEEDED),) |
| export LD_FLAG_ASNEEDED:=--as-needed |
| endif |
| endif |
| ifndef LD_FLAG_NO_ASNEEDED |
| ifdef LD_FLAG_ASNEEDED |
| export LD_FLAG_NO_ASNEEDED:=--no-as-needed |
| endif |
| endif |
| ifndef CC_FLAG_ASNEEDED |
| ifdef LD_FLAG_ASNEEDED |
| export CC_FLAG_ASNEEDED:=-Wl,$(LD_FLAG_ASNEEDED) |
| endif |
| endif |
| ifndef CC_FLAG_NO_ASNEEDED |
| ifdef LD_FLAG_NO_ASNEEDED |
| export CC_FLAG_NO_ASNEEDED:=-Wl,$(LD_FLAG_NO_ASNEEDED) |
| endif |
| endif |
| link.asneeded = $(if $(findstring yy,$(CC_FLAG_ASNEEDED)$(CC_FLAG_NO_ASNEEDED)),$(CC_FLAG_ASNEEDED) $(1) $(CC_FLAG_NO_ASNEEDED)) |
| |
| # Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it) |
| ifndef ASNEEDED |
| export ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -q -- --as-needed && echo "AS_NEEDED ( $(UCLIBC_LDSO) )" || echo "$(UCLIBC_LDSO)") |
| ifeq ($(UCLIBC_HAS_BACKTRACE),y) |
| # Only used in installed libc.so linker script |
| UBACKTRACE_FULL_NAME := $(RUNTIME_PREFIX)lib/$(UBACKTRACE_DSO) |
| export UBACKTRACE_ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -q -- --as-needed && echo "AS_NEEDED ( $(UBACKTRACE_FULL_NAME) )" || echo "$(UBACKTRACE_FULL_NAME)") |
| else |
| export UBACKTRACE_ASNEEDED:="" |
| endif |
| endif |
| |
| # Add a bunch of extra pedantic annoyingly strict checks |
| WARNING_FLAGS = -Wstrict-prototypes -Wstrict-aliasing |
| ifeq ($(EXTRA_WARNINGS),y) |
| WARNING_FLAGS += \ |
| -Wformat=2 \ |
| -Wmissing-noreturn \ |
| -Wmissing-format-attribute \ |
| -Wmissing-prototypes \ |
| -Wmissing-declarations \ |
| -Wnested-externs \ |
| -Wnonnull \ |
| -Wold-style-declaration \ |
| -Wold-style-definition \ |
| -Wshadow \ |
| -Wundef |
| # Works only w/ gcc-3.4 and up, can't be checked for gcc-3.x w/ check_gcc() |
| WARNING_FLAGS-gcc-4 += -Wdeclaration-after-statement |
| endif |
| WARNING_FLAGS += $(WARNING_FLAGS-gcc-$(GCC_MAJOR_VER)) |
| $(foreach w,$(WARNING_FLAGS),$(eval $(call check-gcc-var,$(w)))) |
| XWARNINGS = $(call qstrip,$(WARNINGS)) $(foreach w,$(WARNING_FLAGS),$(CFLAG_$(w))) |
| |
| CPU_CFLAGS=$(call qstrip,$(CPU_CFLAGS-y)) |
| |
| # Save the tested flag in a single variable and force it to be |
| # evaluated just once. Then use that computed value. |
| $(eval $(call check-gcc-var,-fno-stack-protector)) |
| SSP_DISABLE_FLAGS ?= $(CFLAG_-fno-stack-protector) |
| ifeq ($(UCLIBC_BUILD_SSP),y) |
| $(eval $(call check-gcc-var,-fno-stack-protector-all)) |
| $(eval $(call check-gcc-var,-fstack-protector)) |
| $(eval $(call check-gcc-var,-fstack-protector-all)) |
| SSP_CFLAGS := $(CFLAG_-fno-stack-protector-all) |
| SSP_CFLAGS += $(CFLAG_-fstack-protector) |
| SSP_ALL_CFLAGS ?= $(CFLAG_-fstack-protector-all) |
| else |
| SSP_CFLAGS := $(SSP_DISABLE_FLAGS) |
| endif |
| |
| $(eval $(call check-gcc-var,-nostdlib)) |
| |
| # Collect all CFLAGS components |
| CFLAGS := -include $(top_srcdir)include/libc-symbols.h \ |
| $(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \ |
| -nostdinc -I$(top_builddir)include -I$(top_srcdir)include -I. \ |
| -I$(top_srcdir)libc/sysdeps/linux \ |
| -I$(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH) |
| |
| # We need this to be checked within libc-symbols.h |
| ifneq ($(HAVE_SHARED),y) |
| CFLAGS += -DSTATIC |
| endif |
| |
| $(eval $(call check-ld-var,--warn-once)) |
| $(eval $(call check-ld-var,--sort-common)) |
| $(eval $(call check-ld-var,--discard-all)) |
| LDFLAGS_NOSTRIP:=$(CPU_LDFLAGS-y) -shared \ |
| -Wl,--warn-common $(CFLAG_-Wl--warn-once) -Wl,-z,combreloc |
| # binutils-2.16.1 warns about ignored sections, 2.16.91.0.3 and newer are ok |
| #$(eval $(call check-ld-var,--gc-sections)) |
| #LDFLAGS_NOSTRIP += $(LDFLAG_--gc-sections) |
| |
| $(eval $(call check-gcc-var,-fdata-sections)) |
| $(eval $(call check-gcc-var,-ffunction-sections)) |
| |
| ifeq ($(UCLIBC_BUILD_RELRO),y) |
| LDFLAGS_NOSTRIP+=-Wl,-z,relro |
| endif |
| |
| ifeq ($(UCLIBC_BUILD_NOW),y) |
| LDFLAGS_NOSTRIP+=-Wl,-z,now |
| endif |
| |
| ifeq ($(LDSO_GNU_HASH_SUPPORT),y) |
| # Be sure that binutils support it |
| $(eval $(call check-ld-var,--hash-style=gnu)) |
| ifeq ($(LDFLAG_--hash-style=gnu),) |
| ifneq ($(filter-out $(clean_targets) CLEAN_% install_headers headers-y,$(MAKECMDGOALS)),) |
| $(error Your binutils do not support --hash-style option, while you want to use it) |
| endif |
| else |
| LDFLAGS_NOSTRIP += $(CFLAG_-Wl--hash-style=gnu) |
| endif |
| endif |
| |
| LDFLAGS:=$(LDFLAGS_NOSTRIP) -Wl,-z,defs |
| ifeq ($(DODEBUG),y) |
| CFLAGS += -O0 -g3 -DDEBUG |
| else |
| CFLAGS += $(OPTIMIZATION) -g3 |
| endif |
| ifeq ($(DOSTRIP),y) |
| LDFLAGS += -Wl,-s |
| else |
| STRIPTOOL := true -Stripping_disabled |
| endif |
| ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS)),"") |
| CFLAGS += $(call qstrip,$(UCLIBC_EXTRA_CFLAGS)) |
| 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 |
| $(eval $(call check-gcc-var,--combine)) |
| CFLAGS += $(CFLAG_--combine) |
| endif |
| else |
| DOMULTI:=n |
| endif |
| |
| ifneq ($(strip $(UCLIBC_EXTRA_LDFLAGS)),"") |
| LDFLAGS += $(call qstrip,$(UCLIBC_EXTRA_LDFLAGS)) |
| endif |
| |
| ifeq ($(UCLIBC_HAS_THREADS),y) |
| ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y) |
| PTNAME := nptl |
| CFLAGS += -DHAVE_FORCED_UNWIND |
| else |
| ifeq ($(LINUXTHREADS_OLD),y) |
| PTNAME := linuxthreads.old |
| else |
| PTNAME := linuxthreads |
| endif |
| endif |
| PTDIR := libpthread/$(PTNAME) |
| # set up system dependencies include dirs (NOTE: order matters!) |
| ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y) |
| PTINC:= -I$(top_builddir)$(PTDIR) \ |
| -I$(top_srcdir)$(PTDIR) \ |
| $(if $(TARGET_ARCH),-I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH)/$(TARGET_SUBARCH)) \ |
| -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \ |
| -I$(top_builddir)$(PTDIR)/sysdeps/$(TARGET_ARCH) \ |
| -I$(top_srcdir)$(PTDIR)/sysdeps/$(TARGET_ARCH) \ |
| -I$(top_builddir)$(PTDIR)/sysdeps/unix/sysv/linux \ |
| -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux \ |
| -I$(top_srcdir)$(PTDIR)/sysdeps/pthread \ |
| -I$(top_srcdir)$(PTDIR)/sysdeps/pthread/bits \ |
| -I$(top_srcdir)$(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$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux/$(TARGET_ARCH) \ |
| -I$(top_srcdir)$(PTDIR)/sysdeps/$(TARGET_ARCH) \ |
| -I$(top_srcdir)$(PTDIR)/sysdeps/unix/sysv/linux \ |
| -I$(top_srcdir)$(PTDIR)/sysdeps/pthread \ |
| -I$(top_srcdir)$(PTDIR) \ |
| -I$(top_srcdir)libpthread |
| endif |
| CFLAGS+=$(PTINC) |
| else |
| PTNAME := |
| PTINC := |
| endif |
| CFLAGS += -I$(top_srcdir)libc/sysdeps/linux/common |
| CFLAGS += -I$(KERNEL_HEADERS) |
| |
| #CFLAGS += -iwithprefix include-fixed -iwithprefix include |
| $(eval $(call cache-output-var,CC_IPREFIX,$(CC) -print-file-name=include)) |
| CC_INC := -isystem $(dir $(CC_IPREFIX))include-fixed -isystem $(CC_IPREFIX) |
| CFLAGS += $(CC_INC) |
| |
| ifneq ($(DOASSERTS),y) |
| CFLAGS+=-DNDEBUG |
| endif |
| |
| ifeq ($(SYMBOL_PREFIX),_) |
| CFLAGS+=-D__UCLIBC_UNDERSCORES__ |
| endif |
| |
| # Keep the check_as from being needlessly executed |
| ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y) |
| $(eval $(call check-as-var,--noexecstack)) |
| endif |
| ASFLAGS = $(ASFLAG_--noexecstack) |
| |
| LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y) |
| $(eval $(call cache-output-var,LIBGCC,$(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 |
| |
| LOCAL_INSTALL_PATH := install_dir |