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- # Rules.mak for uClibc-ng
- #
- # Copyright (C) 2000-2008 Erik Andersen <andersen@uclibc.org>
- # Copyright (C) 2015-2018 Waldemar Brodkorb <wbx@uclibc-ng.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.
- clean_targets := clean realclean distclean \
- objclean-y headers_clean-y CLEAN_utils
- noconfig_targets := menuconfig config nconfig \
- oldaskconfig silentoldconfig oldconfig allnoconfig allyesconfig \
- alldefconfig randconfig defconfig savedefconfig listnewconfig \
- olddefconfig \
- xconfig gconfig update-po-config mconf qconf gconf nconf conf \
- release dist tags help
- #-----------------------------------------------------------
- # 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-ng 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
- # Select the compiler needed to build binaries for your development system
- HOSTCC = gcc
- BUILD_CFLAGS = -Os
- #---------------------------------------------------------
- # 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)))
- #"))
- # kconfig stuff
- KCONFIG_CONFIG ?= $(top_builddir).config
- KCONFIG_CONFIG := $(abspath $(KCONFIG_CONFIG))
- export KCONFIG_CONFIG
- KCONFIG_AUTOCONFIG := $(dir $(KCONFIG_CONFIG))include/config/auto.conf
- export KCONFIG_AUTOCONFIG
- KCONFIG_TRISTATE := $(dir $(KCONFIG_CONFIG))include/config/tristate.conf
- export KCONFIG_TRISTATE
- srctree := $(abspath $(top_srcdir))
- export srctree
- KCONFIG_AUTOHEADER := $(dir $(KCONFIG_CONFIG))include/generated/autoconf.h
- export KCONFIG_AUTOHEADER
- Kconfig := $(abspath $(top_srcdir)extra/Configs/Config.in)
- # Pull in the user's uClibc-ng configuration
- ifeq ($(filter $(noconfig_targets) clean CLEAN_%,$(MAKECMDGOALS)),)
- -include $(KCONFIG_CONFIG)
- endif
- TARGET_ARCH:=$(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/nds32.*/nds32/ \
- -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.
- scrub_path = $(strip $(subst //,/, $(subst ,/, $(call qstrip,$(1)))))
- TARGET_SUBARCH := $(call qstrip,$(TARGET_SUBARCH))
- RUNTIME_PREFIX := $(call scrub_path,$(RUNTIME_PREFIX))
- DEVEL_PREFIX := $(call scrub_path,$(DEVEL_PREFIX))
- MULTILIB_DIR := $(call scrub_path,$(MULTILIB_DIR))
- KERNEL_HEADERS := $(call scrub_path,$(KERNEL_HEADERS))
- export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_HEADERS MULTILIB_DIR
- # Now config hard core
- MAJOR_VERSION := 1
- MINOR_VERSION := 0
- SUBLEVEL := 37
- EXTRAVERSION :=
- 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)
- UCLIBC_LDSO_NAME := ld-uClibc
- ARCH_NATIVE_BIT := 32
- ifneq ($(findstring $(TARGET_ARCH) , hppa64 ia64 powerpc64 s390x sparc64 x86_64 kvx ),)
- UCLIBC_LDSO_NAME := ld64-uClibc
- ARCH_NATIVE_BIT := 64
- else
- ifeq ($(CONFIG_MIPS_N64_ABI),y)
- UCLIBC_LDSO_NAME := ld64-uClibc
- ARCH_NATIVE_BIT := 64
- endif
- endif
- UCLIBC_LDSO := $(UCLIBC_LDSO_NAME).so.$(ABI_VERSION)
- NONSHARED_LIBNAME := uclibc_nonshared.a
- NONSHARED_LIBPTHREAD := libpthread_nonshared.a
- libc := $(top_builddir)lib/$(SHARED_LIBNAME)
- libc.depend := $(top_builddir)lib/$(SHARED_LIBNAME:.$(ABI_VERSION)=)
- interp := $(top_builddir)lib/interp.os
- ldso := $(top_builddir)lib/$(UCLIBC_LDSO)
- headers_dep := $(top_builddir)include/bits/sysnum.h \
- $(top_builddir)include/bits/uClibc_config.h
- sub_headers := $(headers_dep)
- 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 \
- tf="/tmp/cgccucl$$$$.o"; \
- if $(CC) $(1) -S -o $$tf -xc /dev/null > /dev/null 2>&1; \
- then echo "$(1)"; else echo "$(2)"; fi; rm -f $$tf )
- check_as=$(shell \
- tf="/tmp/casucl$$$$.o"; \
- if $(CC) -Wa,$(1) -Wa,-Z -c -o $$tf -xassembler /dev/null > /dev/null 2>&1; \
- then echo "-Wa,$(1)"; fi; rm -f $$tf )
- check_ld=$(shell \
- tf="/tmp/clducl$$$$.c"; echo "int _start(){return 0;}int main(){return 0;}" >$$tf; \
- if $(CC) $(LDFLAG-fuse-ld) $(CFLAG_-Wl--no-warn-mismatch) -Wl,$(1) $(CFLAG_-nostdlib) -o /dev/null $$tf > /dev/null 2>&1; \
- then echo "$(1)"; fi; rm -f $$tf )
- # 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
- # Note: The check for -nostdlib has to be before all calls to check_ld
- $(eval $(call check-gcc-var,-nostdlib))
- $(eval $(call check-gcc-var,-nostartfiles))
- # deliberately not named CFLAG-fuse-ld since unchecked and from user
- LDFLAG-fuse-ld := $(filter -fuse-ld=%,$(call qstrip,$(UCLIBC_EXTRA_CFLAGS)))
- # failed to merge target specific data of file /dev/null
- # Could use -Wl,--script,$(top_srcdir)extra/scripts/none.lds as well.
- $(eval $(call check-ld-var,--no-warn-mismatch))
- $(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))
- # Flags in OPTIMIZATION are used only for non-debug builds
- OPTIMIZATION:=
- OPTIMIZATION-$(GCC_MAJOR_VER):=
- OPTIMIZATION-$(GCC_MAJOR_VER).$(GCC_MINOR_VER):=
- # Use '-Os' optimization if available, else use -O2, allow Config to override
- $(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
- $(eval $(call check-gcc-var,-funit-at-a-time))
- OPTIMIZATION-3.4 += $(CFLAG_-funit-at-a-time)
- $(eval $(call check-gcc-var,-fstrict-aliasing))
- OPTIMIZATION += $(CFLAG_-fstrict-aliasing)
- # 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 -fcommon
- $(eval $(call check-gcc-var,-fno-asm))
- CPU_CFLAGS-y += $(CFLAG_-fno-asm)
- $(eval $(call check-gcc-var,-fmerge-all-constants))
- CPU_CFLAGS-y += $(CFLAG_-fmerge-all-constants)
- ifeq ($(UCLIBC_HAS_SOFT_FLOAT),y)
- ifneq ($(TARGET_ARCH),bfin)
- ifneq ($(TARGET_ARCH),lm32)
- ifneq ($(TARGET_ARCH),nios2)
- ifneq ($(TARGET_ARCH),nds32)
- ifneq ($(TARGET_ARCH),sh)
- ifneq ($(TARGET_ARCH),c6x)
- ifneq ($(TARGET_ARCH),h8300)
- ifneq ($(TARGET_ARCH),arc)
- ifneq ($(TARGET_ARCH),aarch64)
- CPU_CFLAGS-y += -msoft-float
- endif
- endif
- endif
- endif
- endif
- endif
- endif
- endif
- endif
- endif
- ifeq ($(TARGET_ARCH),aarch64)
- CPU_CFLAGS-y += -ftls-model=initial-exec
- 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
- $(eval $(call check-gcc-var,-fdata-sections))
- $(eval $(call check-gcc-var,-ffunction-sections))
- # 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),y)
- # TODO: Change this to a gcc version check. This bug
- # should be fixed with at least gcc-4.3.
- # 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)
- 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
- 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
- endif
- ifeq ($(TARGET_ARCH),metag)
- SYMBOL_PREFIX=_
- CPU_CFLAGS-$(CONFIG_META_1_2)+=
- CPU_CFLAGS-$(CONFIG_META_2_1)+=-Wa,-mcpu=metac21
- endif
- ifeq ($(TARGET_ARCH),mips)
- OPTIMIZATION+=-mno-split-addresses
- CPU_CFLAGS-$(CONFIG_MIPS_N64_ABI)+=-mabi=64
- CPU_CFLAGS-$(CONFIG_MIPS_O32_ABI)+=-mabi=32
- CPU_CFLAGS-$(CONFIG_MIPS_N32_ABI)+=-mabi=n32
- CPU_CFLAGS-$(CONFIG_MIPS_NAN_LEGACY)+=$(call check_gcc,-mnan=legacy)
- CPU_CFLAGS-$(CONFIG_MIPS_NAN_2008)+=$(call check_gcc,-mnan=2008)
- CPU_LDFLAGS-y += $(CPU_CFLAGS)
- endif
- ifeq ($(TARGET_ARCH),nds32)
- CPU_CFLAGS-$(CONFIG_NDS32_ISA)+=-march=nds32
- CFLAGS-.os+= -DPIC
- CFLAGS-.oS+= -DPIC
- 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
- CPU_CFLAGS-$(CONFIG_SH4A)+=-m4a
- else
- CPU_CFLAGS-$(CONFIG_SH2A)+=-m2a-nofpu
- CPU_CFLAGS-$(CONFIG_SH4)+=-m4-nofpu
- CPU_CFLAGS-$(CONFIG_SH4A)+=-m4a-nofpu
- endif
- endif
- ifeq ($(TARGET_ARCH),h8300)
- CPU_CFLAGS-$(CONFIG_H8300H) += -mh -mint32
- CPU_CFLAGS-$(CONFIG_H8S) += -ms -mint32
- 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),csky)
- # In csky gas implement, we use $t and $d to detect .text or literal pool.
- # So we couldn't strip them for objdump.
- STRIP_FLAGS += -K "$$"t -K "$$"d
- CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN) += -mlittle-endian
- CPU_CFLAGS-$(ARCH_BIG_ENDIAN) += -mbig-endian
- endif
- ifeq ($(TARGET_ARCH),kvx)
- CPU_CFLAGS-$(CONFIG_KVX) += -march=kvx
- 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 printf "\t.text\n\taddis 11,30,_GLOBAL_OFFSET_TABLE_-.@ha\n" | $(CC) -c -x assembler -o /dev/null - 2> /dev/null && echo -n y || echo -n n)
- CPU_CFLAGS-$(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 ($(TARGET_ARCH),frv)
- # Using -pie causes the program to have an interpreter, which is
- # forbidden, so we must make do with -shared. Unfortunately,
- # -shared by itself would get us global function descriptors
- # and calls through PLTs, dynamic resolution of symbols, etc,
- # which would break as well, but -Bsymbolic comes to the rescue.
- CPU_LDFLAGS-y += -Wl,-melf32frvfd -Wl,-Bsymbolic
- endif
- ifeq ($(strip $(TARGET_ARCH)),avr32)
- CPU_CFLAGS-$(CONFIG_AVR32_AP7) += -march=ap
- CPU_CFLAGS-$(CONFIG_LINKRELAX) += -mrelax
- CPU_LDFLAGS-$(CONFIG_LINKRELAX) += --relax
- endif
- ifeq ($(TARGET_ARCH),c6x)
- PIEFLAG:=
- CPU_CFLAGS-$(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 $(call cache-output-var,LDPIEFLAG,$(CC) -Wl$(comma)--help 2>/dev/null | grep -q -- -pie && echo "-pie"))
- # Check for --as-needed support in linker
- ifndef LD_FLAG_ASNEEDED
- _LD_FLAG_ASNEEDED:=$(shell $(CC) -Wl,--help 2>/dev/null | grep -- --as-needed)
- ifneq ($(_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 $(CC_FLAG_ASNEEDED),$(if $(CC_FLAG_NO_ASNEEDED),$(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 $(CC) -Wl,--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
- WARNING_FLAGS = -Wstrict-prototypes -Wstrict-aliasing -Wno-nonnull-compare
- ifeq ($(EXTRA_WARNINGS),y)
- WARNING_FLAGS += \
- -Wnonnull-compare \
- -Wnodeclaration-after-statement \
- -Wformat=2 \
- -Wmissing-noreturn \
- -Wmissing-format-attribute \
- -Wmissing-prototypes \
- -Wmissing-declarations \
- -Wnested-externs \
- -Wnonnull \
- -Wold-style-declaration \
- -Wold-style-definition \
- -Wshadow \
- -Wundef
- 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
- # Collect all CFLAGS components
- CFLAGS := $(XWARNINGS) $(CPU_CFLAGS) $(SSP_CFLAGS) \
- -nostdinc -I$(top_builddir)include \
- -I$(top_srcdir)include -include libc-symbols.h \
- -I$(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH) \
- -I$(top_srcdir)libc/sysdeps/linux \
- -I$(top_srcdir)ldso/ldso/$(TARGET_ARCH) \
- -I$(top_srcdir)ldso/include -I.
- # We need this to be checked within libc-symbols.h
- ifneq ($(HAVE_SHARED),y)
- CFLAGS += -DSTATIC
- endif
- $(eval $(call check-ld-var,--warn-once))
- $(eval $(call check-ld-var,--sort-common))
- $(eval $(call check-ld-var,--discard-all))
- LDFLAGS_NOSTRIP:=$(LDFLAG-fuse-ld) $(CPU_LDFLAGS-y) -shared \
- -Wl,--warn-common $(CFLAG_-Wl--warn-once) -Wl,-z,combreloc
- ifeq ($(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 += $(CFLAG_-Wl--hash-style=gnu)
- endif
- endif
- ifeq ($(DODEBUG),y)
- CFLAGS += -O0 -g3 -DDEBUG
- else
- CFLAGS += $(OPTIMIZATION)
- CFLAGS += $(OPTIMIZATION-$(GCC_MAJOR_VER))
- CFLAGS += $(OPTIMIZATION-$(GCC_MAJOR_VER).$(GCC_MINOR_VER))
- $(eval $(call check-ld-var,-O2))
- LDFLAGS_NOSTRIP += $(CFLAG_-Wl-O2)
- endif
- LDFLAGS:=$(LDFLAGS_NOSTRIP) -Wl,-z,defs
- ifeq ($(DOSTRIP),y)
- LDFLAGS += -Wl,-s
- else
- STRIPTOOL := true -Stripping_disabled
- endif
- ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS)),"")
- CFLAGS += $(call qstrip,$(UCLIBC_EXTRA_CFLAGS))
- endif
- ifneq ($(strip $(UCLIBC_EXTRA_LDFLAGS)),"")
- LDFLAGS += $(call qstrip,$(UCLIBC_EXTRA_LDFLAGS))
- endif
- ifeq ($(UCLIBC_HAS_STDIO_FUTEXES),y)
- CFLAGS += -D__USE_STDIO_FUTEXES__
- endif
- ifeq ($(UCLIBC_HAS_THREADS),y)
- ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
- PTNAME := nptl
- CFLAGS += -DHAVE_FORCED_UNWIND -D_LIBC_REENTRANT
- else
- ifeq ($(UCLIBC_HAS_LINUXTHREADS),y)
- 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 $(TARGET_SUBARCH),-I$(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
- #
- # 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-ng";
- @echo "#### with NPTL support. Upgrade your binutils and gcc to versions which";
- @echo "#### support TLS for your architecture. Do not contact uClibc-ng 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 += -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 += $(CC_INC)
- CFLAGS += -I$(KERNEL_HEADERS)
- 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 $(call cache-output-var,LIBGCC_A,$(CC) $(LIBGCC_CFLAGS) -print-libgcc-file-name))
- $(eval $(call cache-output-var,LIBGCC_EH,$(CC) $(LIBGCC_CFLAGS) -print-file-name=libgcc_eh.a))
- # with -O0 we (e.g. lockf) might end up with references to
- # _Unwind_Resume, so pull in gcc_eh in this case..
- # with a --disable-shared toolchain, libgcc_eh.a and libgcc.a are combined
- # in libgcc.a, so check if the printed file exist, before adding to the commandline
- LIBGCC_EH_FILE := $(shell if [ -f $(LIBGCC_EH) ]; then echo $(LIBGCC_EH); fi)
- LIBGCC_DIR := $(dir $(LIBGCC_A))
- LIBGCC := $(LIBGCC_A) $(if $(DODEBUG),$(LIBGCC_EH_FILE))
- # 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 := $(if $(O),$(O)/)install_dir
- PTHREAD_GENERATE_MANGLE ?= -n "s/^.*@@@name@@@\([^@]*\)@@@value@@@[^0-9Xxa-fA-F-]*\([0-9Xxa-fA-F-][0-9Xxa-fA-F-]*\).*@@@end@@@.*\$$/\#define \1 \2/p"
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