# Rules.make for uClibc
#
-# Copyright (C) 2000-200
6 Erik Andersen <andersen@uclibc.org>
+# Copyright (C) 2000-200
8 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 ($(findstring 3.7,$(MAKE_VERSION)),)
+ifneq ($(findstring x3.7,x$(MAKE_VERSION)),)
$(error Your make is too old $(MAKE_VERSION). Go get at least 3.80)
endif
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 -UUCLIBC_INTERNAL
+
# Select the compiler needed to build binaries for your development system
HOSTCC = gcc
-BUILD_CFLAGS = -O2 -Wall
+BUILD_CFLAGS = -Os -Wall
+export ARCH := $(shell uname -m | $(SED) -e s/i.86/i386/ \
+ -e s/sun.*/sparc/ -e s/sparc.*/sparc/ \
+ -e s/arm.*/arm/ -e s/sa110/arm/ \
+ -e s/sh.*/sh/ \
+ -e s/s390x/s390/ -e s/parisc.*/hppa/ \
+ -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
+ -e s/xtensa.*/xtensa/ )
#---------------------------------------------------------
# mortals. Unless you hang out with the gods, you should
# probably leave all this stuff alone.
+
# Pull in the user's uClibc configuration
ifeq ($(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' $(top_builddir)/.config | sed -e 's/^TARGET_ARCH=//' -e 's/"//g')
+TARGET_ARCH:=$(shell grep -s '^TARGET_ARCH' $(top_builddir)/.config | $(SED) -e 's/^TARGET_ARCH=//' -e 's/"//g')
TARGET_ARCH:=$(strip $(subst ",, $(strip $(TARGET_ARCH))))
+TARGET_SUBARCH:=$(shell grep -s '^TARGET_SUBARCH' $(top_builddir)/.config | $(SED) -e 's/^TARGET_SUBARCH=//' -e 's/"//g')
+TARGET_SUBARCH:=$(strip $(subst ",, $(strip $(TARGET_SUBARCH))))
RUNTIME_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(RUNTIME_PREFIX))))))
DEVEL_PREFIX:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(DEVEL_PREFIX))))))
-KERNEL_SOURCE:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(KERNEL_SOURCE))))))
-export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_SOURCE
+KERNEL_HEADERS:=$(strip $(subst //,/, $(subst ,/, $(subst ",, $(strip $(KERNEL_HEADERS))))))
+export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_HEADERS
# Now config hard core
MAJOR_VERSION := 0
MINOR_VERSION := 9
-SUBLEVEL := 29
+SUBLEVEL := 30
+EXTRAVERSION :=-svn
VERSION := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
+ifneq ($(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 LC_ALL
LIBC := libc
SHARED_MAJORNAME := $(LIBC).so.$(MAJOR_VERSION)
-ifneq ($(findstring $(TARGET_ARCH) , hppa64 ia64 mips64 powerpc64 s390x sh64 sparc64 x86_64 ),)
+ifneq ($(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 := $(UCLIBC_LDSO_NAME).so.$(MAJOR_VERSION)
NONSHARED_LIBNAME := uclibc_nonshared.a
libc := $(top_builddir)lib/$(SHARED_MAJORNAME)
+libc.depend := $(top_builddir)lib/$(SHARED_MAJORNAME:.$(MAJOR_VERSION)=)
interp := $(top_builddir)lib/interp.os
ldso := $(top_builddir)lib/$(UCLIBC_LDSO)
headers_dep := $(top_builddir)include/bits/sysnum.h
ldso :=
endif
+comma:=,
+space:= #
+
ifndef CROSS
-CROSS=$(subst ",, $(strip $(CROSS_COMPILER_PREFIX)))
+CROSS=$(strip $(subst ",, $(CROSS_COMPILER_PREFIX)))
endif
# A nifty macro to make testing gcc features easier
ARFLAGS:=cr
+
+# Flags in OPTIMIZATION are used only for non-debug builds
+
OPTIMIZATION:=
# Use '-Os' optimization if available, else use -O2, allow Config to override
OPTIMIZATION+=$(call check_gcc,-Os,-O2)
OPTIMIZATION+=$(call check_gcc,-fno-strength-reduce,)
endif
-PICFLAG:=-fPIC
+
+# 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
+
+CPU_CFLAGS-y += $(call check_gcc,-fno-asm,)
+
+LDADD_LIBFLOAT=
+ifeq ($(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 ($(TARGET_ARCH),sh)
+CPU_CFLAGS-y += -msoft-float
+endif
+endif
+endif
+ifeq ($(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
+
+CPU_CFLAGS-y += $(call check_gcc,-std=gnu99,)
+
+CPU_CFLAGS-$(UCLIBC_FORMAT_SHARED_FLAT) += -mid-shared-library
+CPU_CFLAGS-$(UCLIBC_FORMAT_FLAT_SEP_DATA) += -msep-data
+
+PICFLAG-y := -fPIC
+PICFLAG-$(UCLIBC_FORMAT_FDPIC_ELF) := -mfdpic
+PICFLAG := $(PICFLAG-y)
PIEFLAG_NAME:=-fPIE
# Some nice CPU specific optimizations
ifeq ($(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)
+ OPTIMIZATION+=$(call check_gcc,-fomit-frame-pointer,)
+
+ifeq ($(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
+ OPTIMIZATION+=$(call check_gcc,-mpreferred-stack-boundary=4,)
+endif
+
+ # Choice of alignment (please document why!)
+ # -falign-labels: in-line labels
+ # (reachable by normal code flow, aligning will insert nops
+ # which will be executed - may even make things slower)
+ # -falign-jumps: reachable only by a jump
+ # Generic: no alignment at all (smallest code)
+ GCC_FALIGN=$(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 += $(call check_gcc,-ffunction-sections -fdata-sections,)
+ifneq ($(call check_ld,--sort-common,),)
+ CPU_LDFLAGS-y += -Wl,--sort-common
+endif
+ifneq ($(call check_ld,--sort-section alignment),)
+ CPU_LDFLAGS-y += -Wl,--sort-section,alignment
+endif
+
+ CPU_LDFLAGS-y+=-m32
+ CPU_CFLAGS-y+=-m32
CPU_CFLAGS-$(CONFIG_386)+=-march=i386
CPU_CFLAGS-$(CONFIG_486)+=-march=i486
CPU_CFLAGS-$(CONFIG_ELAN)+=-march=i486
CPU_CFLAGS-$(CONFIG_PENTIUMIII)+=$(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_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) $(call check_gcc,-falign-functions=0,-malign-functions=0)
+ CPU_CFLAGS-$(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),arm)
OPTIMIZATION+=-fstrict-aliasing
- CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
- CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
+ CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-Wl,-EL
+ CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-Wl,-EB
CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9tdmi -march=armv5t
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-$(CONFIG_ARM_CORTEX_M3)+=-mcpu=cortex-m3 -mthumb
+ CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M1)+=-mcpu=cortex-m1 -mthumb
endif
ifeq ($(TARGET_ARCH),mips)
- CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
- CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
+ CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-Wl,-EL
+ CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-Wl,-EB
CPU_CFLAGS-$(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-$(CONFIG_MIPS_ISA_MIPS32R2)+=-march=mips32r2 -mtune=mips32r2
CPU_CFLAGS-$(CONFIG_MIPS_ISA_MIPS64)+=-mips64 -mtune=mips32
ifeq ($(strip $(ARCH_BIG_ENDIAN)),y)
- CPU_LDFLAGS-$(CONFIG_MIPS_N64_ABI)+=-melf64btsmip
- CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-melf32btsmip
+ CPU_LDFLAGS-$(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)+=-melf64ltsmip
- CPU_LDFLAGS-$(CONFIG_MIPS_O32_ABI)+=-melf32ltsmip
+ CPU_LDFLAGS-$(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-$(CONFIG_MIPS_O32_ABI)+=-mabi=32
endif
ifeq ($(TARGET_ARCH),nios)
- CPU_LDFLAGS-y+=-m32
- CPU_CFLAGS-y+=-m32
+ CPU_LDFLAGS-y+=-Wl,-m32
+ CPU_CFLAGS-y+=-Wl,-m32
endif
ifeq ($(TARGET_ARCH),sh)
OPTIMIZATION+=-fstrict-aliasing
OPTIMIZATION+= $(call check_gcc,-mprefergot,)
- CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-EL
- CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-EB
+ CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN)+=-Wl,-EL
+ CPU_LDFLAGS-$(ARCH_BIG_ENDIAN)+=-Wl,-EB
CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-ml
CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mb
CPU_CFLAGS-$(CONFIG_SH2)+=-m2
ifeq ($(TARGET_ARCH),sh64)
OPTIMIZATION+=-fstrict-aliasing
- CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):=-EL
- CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):=-EB
+ CPU_LDFLAGS-$(ARCH_LITTLE_ENDIAN):=-Wl,-EL
+ CPU_LDFLAGS-$(ARCH_BIG_ENDIAN):=-Wl,-EB
CPU_CFLAGS-$(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-$(CONFIG_H8S) += -ms8300s
+ SYMBOL_PREFIX=_
+ CPU_LDFLAGS-$(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),cris)
- CPU_LDFLAGS-$(CONFIG_CRIS)+=-mcrislinux
- CPU_LDFLAGS-$(CONFIG_CRISV32)+=-mcrislinux
+ CPU_LDFLAGS-$(CONFIG_CRIS)+=-Wl,-mcrislinux
+ CPU_LDFLAGS-$(CONFIG_CRISV32)+=-Wl,-mcrislinux
CPU_CFLAGS-$(CONFIG_CRIS)+=-mlinux
PICFLAG:=-fpic
PIEFLAG_NAME:=-fpie
# faster code.
PICFLAG:=-fpic
PIEFLAG_NAME:=-fpie
+ PPC_HAS_REL16:=$(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)
- PICFLAG:=-mfdpic
+ 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)+=-melf32frvfd
- CPU_CFLAGS-$(CONFIG_FRV)+=-mfdpic
+ CPU_LDFLAGS-$(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 -Bsymbolic
+ export LDPIEFLAG:=-Wl,-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),microblaze)
+ SYMBOL_PREFIX=_
+endif
+
+ifeq ($(TARGET_ARCH),v850)
+ SYMBOL_PREFIX=_
+endif
+
# Keep the check_gcc from being needlessly executed
ifndef PIEFLAG
-ifneq ($(UCLIBC_BUILD_PIE),y)
-export PIEFLAG:=
-else
export PIEFLAG:=$(call check_gcc,$(PIEFLAG_NAME),$(PICFLAG))
endif
-endif
# We need to keep track of both the CC PIE flag (above) as
# well as the LD PIE flag (below) because we can't rely on
-# gcc passing -pie if we used -fPIE
+# gcc passing -pie if we used -fPIE. We need to directly use -pie
+# instead of -Wl,-pie as gcc picks up the wrong startfile/endfile
ifndef LDPIEFLAG
-ifneq ($(UCLIBC_BUILD_PIE),y)
-export LDPIEFLAG:=
-else
-export LDPIEFLAG:=$(shell $(LD) --help 2>/dev/null | grep -q -- -pie && echo "-Wl,-pie")
+export LDPIEFLAG:=$(shell $(LD) --help 2>/dev/null | grep -q -- -pie && echo "-pie")
+endif
+
+# Check for --as-needed support in linker
+ifndef LD_FLAG_ASNEEDED
+_LD_FLAG_ASNEEDED:=$(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 $(and $(CC_FLAG_ASNEEDED),$(CC_FLAG_NO_ASNEEDED)),$(CC_FLAG_ASNEEDED) $(1) $(CC_FLAG_NO_ASNEEDED))
# Check for AS_NEEDED support in linker script (binutils>=2.16.1 has it)
ifndef ASNEEDED
-ifneq ($(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 $LD_TMP ) )
-endif
+export ASNEEDED:=$(shell $(LD) --help 2>/dev/null | grep -q -- --as-needed && echo "AS_NEEDED ( $(UCLIBC_LDSO) )" || echo "$(UCLIBC_LDSO)")
endif
# Add a bunch of extra pedantic annoyingly strict checks
ifeq ($(EXTRA_WARNINGS),y)
XWARNINGS+=-Wnested-externs -Wshadow -Wmissing-noreturn -Wmissing-format-attribute -Wformat=2
XWARNINGS+=-Wmissing-prototypes -Wmissing-declarations
-# works only w/ gcc-3.4 and up, can't be checked for gcc-3.x w/ check_gcc()
+XWARNINGS+=-Wnonnull -Wundef
+# Works only w/ gcc-3.4 and up, can't be checked for gcc-3.x w/ check_gcc()
#XWARNINGS+=-Wdeclaration-after-statement
endif
+# Seems to be unused (no ARCH_CFLAGS anywhere), delete?
+# if yes, remove after 0.9.31
XARCH_CFLAGS=$(subst ",, $(strip $(ARCH_CFLAGS)))
CPU_CFLAGS=$(subst ",, $(strip $(CPU_CFLAGS-y)))
SSP_CFLAGS := $(SSP_DISABLE_FLAGS)
endif
-# Some nice CFLAGS to work with
+NOSTDLIB_CFLAGS:=$(call check_gcc,-nostdlib,)
+
+# Collect all CFLAGS components
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
+ -nostdinc -I$(top_builddir)include -I. \
+ -I$(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH)
+ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS)),"")
+CFLAGS += $(subst ",, $(UCLIBC_EXTRA_CFLAGS))
endif
-# Make sure "char" behavior is the same everywhere
-CFLAGS += -fsigned-char
+# Please let us see private headers' parts
+# Deprecated: _LIBC serves the same purpose
+CFLAGS += -DUCLIBC_INTERNAL
# We need this to be checked within libc-symbols.h
ifneq ($(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:=$(CPU_LDFLAGS-y) -Wl,-shared \
+ -Wl,--warn-common -Wl,--warn-once -Wl,-z,combreloc
# binutils-2.16.1 warns about ignored sections, 2.16.91.0.3 and newer are ok
#LDFLAGS_NOSTRIP+=$(call check_ld,--gc-sections)
ifeq ($(UCLIBC_BUILD_RELRO),y)
-LDFLAGS_NOSTRIP+=-z relro
+LDFLAGS_NOSTRIP+=-Wl,-z,relro
endif
ifeq ($(UCLIBC_BUILD_NOW),y)
-LDFLAGS_NOSTRIP+=-z now
+LDFLAGS_NOSTRIP+=-Wl,-z,now
endif
-LDFLAGS:=$(LDFLAGS_NOSTRIP) -z defs
+ifeq ($(LDSO_GNU_HASH_SUPPORT),y)
+# Be sure that binutils support it
+LDFLAGS_GNUHASH:=$(call check_ld,--hash-style=gnu)
+ifeq ($(LDFLAGS_GNUHASH),)
+ifneq ($(filter-out install_headers,$(MAKECMDGOALS)),)
+$(error Your binutils don't support --hash-style option, while you want to use it)
+endif
+else
+LDFLAGS_NOSTRIP += -Wl,$(LDFLAGS_GNUHASH)
+endif
+endif
+
+LDFLAGS:=$(LDFLAGS_NOSTRIP) -Wl,-z,defs
ifeq ($(DODEBUG),y)
-#CFLAGS += -g3
CFLAGS += -O0 -g3
else
CFLAGS += $(OPTIMIZATION) $(XARCH_CFLAGS)
endif
ifeq ($(DOSTRIP),y)
-LDFLAGS += -s
+LDFLAGS += -Wl,-s
else
STRIPTOOL := true -Stripping_disabled
endif
DOMULTI:=n
endif
+ifneq ($(strip $(UCLIBC_EXTRA_LDFLAGS)),"")
+LDFLAGS += $(subst ",, $(UCLIBC_EXTRA_LDFLAGS))
+endif
+
ifeq ($(UCLIBC_HAS_THREADS),y)
ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
PTNAME := nptl
PTNAME :=
PTINC :=
endif
+CFLAGS += -I$(KERNEL_HEADERS)
-# 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)
+#CFLAGS += -iwithprefix include-fixed -iwithprefix include
+CC_IPREFIX := $(shell $(CC) --print-file-name=include)
+CC_INC := -I$(dir $(CC_IPREFIX))include-fixed -I$(CC_IPREFIX)
+CFLAGS += $(CC_INC)
ifneq ($(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)
+ifeq ($(SYMBOL_PREFIX),_)
+CFLAGS+=-D__UCLIBC_UNDERSCORES__
endif
# Keep the check_as from being needlessly executed
SHARED_END_FILES:=$(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
+LOCAL_INSTALL_PATH := install_dir
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