X-Git-Url: http://git.osdn.net/view?a=blobdiff_plain;f=Rules.mak;h=00e8481b8564310160b4794e40e2ecd20d216fbf;hb=3457d04a3d79cd046ef5d1b000047805aa03ec97;hp=8cd666fe65ee26a61657dfdf4d4c809e696d5698;hpb=bda6117489ad3de5abfb008a8cb065c9059cd60c;p=uclinux-h8%2FuClibc.git diff --git a/Rules.mak b/Rules.mak index 8cd666fe6..00e8481b8 100644 --- a/Rules.mak +++ b/Rules.mak @@ -30,24 +30,24 @@ endif #----------------------------------------------------------- # If you are running a cross compiler, you will want to set -# 'CROSS' to something more interesting ... Target +# '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=arm-linux- +# make CROSS_COMPILE=arm-linux- # will build uClibc for 'arm'. +# CROSS is still supported for backward compatibily only -ifndef CROSS -CROSS= -endif -CC = $(CROSS)gcc -AR = $(CROSS)ar -LD = $(CROSS)ld -NM = $(CROSS)nm -OBJDUMP = $(CROSS)objdump -STRIPTOOL = $(CROSS)strip +CROSS_COMPILE ?= $(CROSS) + +CC = $(CROSS_COMPILE)gcc +AR = $(CROSS_COMPILE)ar +LD = $(CROSS_COMPILE)ld +NM = $(CROSS_COMPILE)nm +OBJDUMP = $(CROSS_COMPILE)objdump +STRIPTOOL = $(CROSS_COMPILE)strip INSTALL = install LN = ln @@ -93,7 +93,6 @@ endif export ARCH # Make certain these contain a final "/", but no "//"s. -TARGET_SUBARCH:=$(call qstrip,$(shell grep -s '^TARGET_SUBARCH' $(top_builddir)/.config | $(SED) -e 's/^TARGET_SUBARCH=//')) TARGET_SUBARCH:=$(call qstrip,$(TARGET_SUBARCH)) RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(call qstrip,$(RUNTIME_PREFIX))))) DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(call qstrip,$(DEVEL_PREFIX))))) @@ -105,8 +104,8 @@ export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_HEADERS MULTILIB_DIR # Now config hard core MAJOR_VERSION := 0 MINOR_VERSION := 9 -SUBLEVEL := 32 -EXTRAVERSION :=-rc3-git +SUBLEVEL := 34 +EXTRAVERSION :=-git VERSION := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL) ABI_VERSION := $(MAJOR_VERSION) ifneq ($(EXTRAVERSION),) @@ -118,7 +117,7 @@ export MAJOR_VERSION MINOR_VERSION SUBLEVEL VERSION ABI_VERSION LC_ALL LIBC := libc SHARED_LIBNAME := $(LIBC).so.$(ABI_VERSION) -UBACKTRACE_DSO := libubacktrace.so.$(MAJOR_VERSION) +UBACKTRACE_DSO := libubacktrace.so.$(ABI_VERSION) ifneq ($(findstring $(TARGET_ARCH) , hppa64 ia64 mips64 powerpc64 s390x sparc64 x86_64 ),) UCLIBC_LDSO_NAME := ld64-uClibc ARCH_NATIVE_BIT := 64 @@ -159,8 +158,8 @@ endif comma:=, space:= # -ifndef CROSS -CROSS=$(call qstrip,$(CROSS_COMPILER_PREFIX)) +ifeq ($(CROSS_COMPILE),) +CROSS_COMPILE=$(call qstrip,$(CROSS_COMPILER_PREFIX)) endif # A nifty macro to make testing gcc features easier @@ -174,6 +173,52 @@ 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, +# Check the C compiler to see if it supports . +# Export the variable CFLAG_ if it does. +define check-gcc-var +$(call check-tool-var,check_gcc,CFLAG,$(1)) +endef +# Usage: check-as-var, +# Check the assembler to see if it supports . Export the +# variable ASFLAG_ if it does (for invoking the assembler), +# as well CFLAG_-Wa (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)$$(ASFLAG_$(1))) +endef +# Usage: check-ld-var, +# Check the linker to see if it supports . Export the +# variable LDFLAG_ if it does (for invoking the linker), +# as well CFLAG_-Wl (for invoking the compiler driver). +define check-ld-var +$(call check-tool-var,check_ld,LDFLAG,$(1)) +_v = CFLAG_-Wl$(1) +export $$(_v) = $$(if $$(LDFLAG_$(1)),-Wl$$(comma)$$(LDFLAG_$(1))) +endef +# Usage: cache-output-var,, +# Execute and cache the output in . +define cache-output-var +ifndef $(1) +$(1) := $$(shell $(2)) +export $(1) +endif +endef + + ARFLAGS:=cr @@ -181,24 +226,37 @@ ARFLAGS:=cr OPTIMIZATION:= # Use '-Os' optimization if available, else use -O2, allow Config to override -OPTIMIZATION+=$(call check_gcc,-Os,-O2) +$(eval $(call check-gcc-var,-Os)) +ifneq ($(CFLAG_-Os),) +OPTIMIZATION += $(CFLAG_-Os) +else +$(eval $(call check-gcc-var,-O2)) +OPTIMIZATION += $(CFLAG_-O2) +endif # Use the gcc 3.4 -funit-at-a-time optimization when available -OPTIMIZATION+=$(call check_gcc,-funit-at-a-time,) +$(eval $(call check-gcc-var,-funit-at-a-time)) +OPTIMIZATION += $(CFLAG_-funit-at-a-time) # shrinks code by about 0.1% -OPTIMIZATION+=$(call check_gcc,-fmerge-all-constants) -OPTIMIZATION+=$(call check_gcc,-fstrict-aliasing) +$(eval $(call check-gcc-var,-fmerge-all-constants)) +$(eval $(call check-gcc-var,-fstrict-aliasing)) +OPTIMIZATION += $(CFLAG_-fmerge-all-constants) $(CFLAG_-fstrict-aliasing) -GCC_MAJOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 1) -#GCC_MINOR_VER?=$(shell $(CC) -dumpversion | cut -d . -f 2) +$(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 ($(GCC_MAJOR_VER),4) # shrinks code, results are from 4.0.2 # 0.36% -OPTIMIZATION+=$(call check_gcc,-fno-tree-loop-optimize,) +$(eval $(call check-gcc-var,-fno-tree-loop-optimize)) +OPTIMIZATION += $(CFLAG_-fno-tree-loop-optimize) # 0.34% -OPTIMIZATION+=$(call check_gcc,-fno-tree-dominator-opts,) +$(eval $(call check-gcc-var,-fno-tree-dominator-opts)) +OPTIMIZATION += $(CFLAG_-fno-tree-dominator-opts) # 0.1% -OPTIMIZATION+=$(call check_gcc,-fno-strength-reduce,) +$(eval $(call check-gcc-var,-fno-strength-reduce)) +OPTIMIZATION += $(CFLAG_-fno-strength-reduce) endif @@ -209,7 +267,8 @@ endif # sign extension of 'char' type for 10 hours straight. Not fun. CPU_CFLAGS-y := -funsigned-char -fno-builtin -CPU_CFLAGS-y += $(call check_gcc,-fno-asm,) +$(eval $(call check-gcc-var,-fno-asm)) +CPU_CFLAGS-y += $(CFLAG_-fno-asm) LDADD_LIBFLOAT= ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y) @@ -232,7 +291,8 @@ ifeq ($(TARGET_ARCH),arm) endif endif -CPU_CFLAGS-y += $(call check_gcc,-std=gnu99,) +$(eval $(call check-gcc-var,-std=gnu99)) +CPU_CFLAGS-y += $(CFLAG_-std=gnu99) CPU_CFLAGS-$(UCLIBC_FORMAT_SHARED_FLAT) += -mid-shared-library CPU_CFLAGS-$(UCLIBC_FORMAT_FLAT_SEP_DATA) += -msep-data @@ -248,7 +308,8 @@ PIEFLAG_NAME:=-fPIE # Some nice CPU specific optimizations ifeq ($(TARGET_ARCH),i386) - OPTIMIZATION+=$(call check_gcc,-fomit-frame-pointer,) +$(eval $(call check-gcc-var,-fomit-frame-pointer)) + OPTIMIZATION += $(CFLAG_-fomit-frame-pointer) ifeq ($(CONFIG_386)$(CONFIG_486)$(CONFIG_586)$(CONFIG_586MMX),y) # Non-SSE capable processor. @@ -258,7 +319,8 @@ ifeq ($(CONFIG_386)$(CONFIG_486)$(CONFIG_586)$(CONFIG_586MMX),y) # -m32 is needed if host is 64-bit OPTIMIZATION+=$(call check_gcc,-m32 -mpreferred-stack-boundary=2,) else - OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=4,) +$(eval $(call check-gcc-var,-mpreferred-stack-boundary=4)) + OPTIMIZATION += $(CFLAG_-mpreferred-stack-boundary=4) endif # Choice of alignment (please document why!) @@ -297,13 +359,10 @@ endif # 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 += $(call check_gcc,-ffunction-sections -fdata-sections,) -ifneq ($(call check_ld,--sort-common),) - CPU_LDFLAGS-y += -Wl,--sort-common -endif -ifneq ($(call check_ld,--sort-section alignment),) - CPU_LDFLAGS-y += -Wl,--sort-section,alignment -endif + 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 += $(CFLAG_-Wl--sort-section=alignment) CPU_LDFLAGS-y+=-m32 CPU_CFLAGS-y+=-m32 @@ -335,25 +394,6 @@ endif ifeq ($(TARGET_ARCH),arm) 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=armv4t - CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4t - CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4t - CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4t - CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9e -march=armv5te - CPU_CFLAGS-$(CONFIG_ARM10T)+=-mtune=arm10tdmi -march=armv5t - CPU_CFLAGS-$(CONFIG_ARM1136JF_S)+=-mtune=arm1136jf-s -march=armv6 - CPU_CFLAGS-$(CONFIG_ARM1176JZ_S)+=-mtune=arm1176jz-s -march=armv6 - CPU_CFLAGS-$(CONFIG_ARM1176JZF_S)+=-mtune=arm1176jzf-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-$(CONFIG_ARM_XSCALE)+=-march=armv5te -Wa,-mcpu=xscale - CPU_CFLAGS-$(CONFIG_ARM_IWMMXT)+=-march=iwmmxt -Wa,-mcpu=iwmmxt -mabi=iwmmxt - CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M3)+=-mcpu=cortex-m3 - CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M1)+=-mcpu=cortex-m1 CPU_CFLAGS-$(COMPILE_IN_THUMB_MODE)+=-mthumb endif @@ -386,7 +426,8 @@ ifeq ($(TARGET_ARCH),nios) endif ifeq ($(TARGET_ARCH),sh) - OPTIMIZATION+= $(call check_gcc,-mprefergot,) +$(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 @@ -496,17 +537,16 @@ ifeq ($(TARGET_ARCH),c6x) CPU_LDFLAGS-y += $(CPU_CFLAGS) endif -# Keep the check_gcc from being needlessly executed -ifndef PIEFLAG -export PIEFLAG:=$(call check_gcc,$(PIEFLAG_NAME),$(PICFLAG)) +$(eval $(call check-gcc-var,$(PIEFLAG_NAME))) +PIEFLAG := $(CFLAG_$(PIEFLAG_NAME)) +ifeq ($(PIEFLAG),) +PIEFLAG := $(PICFLAG) endif # We need to keep track of both the CC PIE flag (above) as # well as the LD PIE flag (below) because we can't rely on # gcc passing -pie if we used -fPIE. We need to directly use -pie # instead of -Wl,-pie as gcc picks up the wrong startfile/endfile -ifndef LDPIEFLAG -export LDPIEFLAG:=$(shell $(LD) --help 2>/dev/null | grep -q -- -pie && echo "-pie") -endif +$(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 @@ -545,13 +585,9 @@ endif endif # Add a bunch of extra pedantic annoyingly strict checks -XWARNINGS=$(call qstrip,$(WARNINGS)) -XWARNINGS+=$(foreach w,\ - -Wstrict-prototypes \ - -Wstrict-aliasing \ - , $(call check_gcc,$(w),)) +WARNING_FLAGS = -Wstrict-prototypes -Wstrict-aliasing ifeq ($(EXTRA_WARNINGS),y) -XWARNINGS+=$(foreach w,\ +WARNING_FLAGS += \ -Wformat=2 \ -Wmissing-noreturn \ -Wmissing-format-attribute \ @@ -562,23 +598,32 @@ XWARNINGS+=$(foreach w,\ -Wold-style-declaration \ -Wold-style-definition \ -Wshadow \ - -Wundef \ - , $(call check_gcc,$(w),)) + -Wundef # Works only w/ gcc-3.4 and up, can't be checked for gcc-3.x w/ check_gcc() -#XWARNINGS+=-Wdeclaration-after-statement +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)) -SSP_DISABLE_FLAGS ?= $(call check_gcc,-fno-stack-protector,) +# Save the tested flag in a single variable and force it to be +# evaluated just once. Then use that computed value. +$(eval $(call check-gcc-var,-fno-stack-protector)) +SSP_DISABLE_FLAGS ?= $(CFLAG_-fno-stack-protector) ifeq ($(UCLIBC_BUILD_SSP),y) -SSP_CFLAGS := $(call check_gcc,-fno-stack-protector-all,) -SSP_CFLAGS += $(call check_gcc,-fstack-protector,) -SSP_ALL_CFLAGS ?= $(call check_gcc,-fstack-protector-all,) +$(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 := $(SSP_DISABLE_FLAGS) endif -NOSTDLIB_CFLAGS:=$(call check_gcc,-nostdlib,) +$(eval $(call check-gcc-var,-nostdlib)) # Collect all CFLAGS components CFLAGS := -include $(top_srcdir)include/libc-symbols.h \ @@ -586,22 +631,23 @@ CFLAGS := -include $(top_srcdir)include/libc-symbols.h \ -nostdinc -I$(top_builddir)include -I$(top_srcdir)include -I. \ -I$(top_srcdir)libc/sysdeps/linux \ -I$(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH) -ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS)),"") -CFLAGS += $(call qstrip,$(UCLIBC_EXTRA_CFLAGS)) -endif # We need this to be checked within libc-symbols.h ifneq ($(HAVE_SHARED),y) CFLAGS += -DSTATIC endif -LDFLAG_WARN_ONCE:=$(if $(call check_ld,--warn-once),-Wl$(comma)--warn-once) -LDFLAG_SORT_COMMON:=$(if $(call check_ld,--sort-common),-Wl$(comma)--sort-common) -LDFLAG_DISCARD_ALL:=$(if $(call check_ld,--discard-all),-Wl$(comma)--discard-all) +$(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 $(LDFLAG_WARN_ONCE) -Wl,-z,combreloc + -Wl,--warn-common $(CFLAG_-Wl--warn-once) -Wl,-z,combreloc # binutils-2.16.1 warns about ignored sections, 2.16.91.0.3 and newer are ok -#LDFLAGS_NOSTRIP+=$(call check_ld,--gc-sections) +#$(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 @@ -613,13 +659,13 @@ endif ifeq ($(LDSO_GNU_HASH_SUPPORT),y) # Be sure that binutils support it -LDFLAGS_GNUHASH:=$(call check_ld,--hash-style=gnu) -ifeq ($(LDFLAGS_GNUHASH),) -ifneq ($(filter-out $(clean_targets) install_headers headers-y,$(MAKECMDGOALS)),) +$(eval $(call check-ld-var,--hash-style=gnu)) +ifeq ($(LDFLAG_--hash-style=gnu),) +ifneq ($(filter-out $(clean_targets) CLEAN_% install_headers headers-y,$(MAKECMDGOALS)),) $(error Your binutils do not support --hash-style option, while you want to use it) endif else -LDFLAGS_NOSTRIP += -Wl,$(LDFLAGS_GNUHASH) +LDFLAGS_NOSTRIP += $(CFLAG_-Wl--hash-style=gnu) endif endif @@ -634,6 +680,9 @@ LDFLAGS += -Wl,-s else STRIPTOOL := true -Stripping_disabled endif +ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS)),"") +CFLAGS += $(call qstrip,$(UCLIBC_EXTRA_CFLAGS)) +endif ifeq ($(DOMULTI),y) # we try to compile all sources at once into an object (IMA), but @@ -644,7 +693,8 @@ ifeq ($(DOMULTI),y) ifeq ($(GCC_MAJOR_VER),3) DOMULTI:=n else -CFLAGS+=$(call check_gcc,--combine,) +$(eval $(call check-gcc-var,--combine)) +CFLAGS += $(CFLAG_--combine) endif else DOMULTI:=n @@ -716,7 +766,7 @@ CFLAGS += -I$(top_srcdir)libc/sysdeps/linux/common CFLAGS += -I$(KERNEL_HEADERS) #CFLAGS += -iwithprefix include-fixed -iwithprefix include -CC_IPREFIX := $(shell $(CC) --print-file-name=include) +$(eval $(call cache-output-var,CC_IPREFIX,$(CC) -print-file-name=include)) CC_INC := -isystem $(dir $(CC_IPREFIX))include-fixed -isystem $(CC_IPREFIX) CFLAGS += $(CC_INC) @@ -729,17 +779,13 @@ CFLAGS+=-D__UCLIBC_UNDERSCORES__ endif # Keep the check_as from being needlessly executed -ifndef ASFLAGS_NOEXEC ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y) -export ASFLAGS_NOEXEC := $(call check_as,--noexecstack) -else -export ASFLAGS_NOEXEC := -endif +$(eval $(call check-as-var,--noexecstack)) endif -ASFLAGS = $(ASFLAGS_NOEXEC) +ASFLAGS = $(ASFLAG_--noexecstack) LIBGCC_CFLAGS ?= $(CFLAGS) $(CPU_CFLAGS-y) -LIBGCC:=$(shell $(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name) +$(eval $(call cache-output-var,LIBGCC,$(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name)) LIBGCC_DIR:=$(dir $(LIBGCC)) # moved from libpthread/linuxthreads