+++ /dev/null
-#
-# This file implements the support for external toolchains, i.e
-# toolchains that have not been produced by Buildroot itself and that
-# Buildroot can download from the Web or that are already available on
-# the system on which Buildroot runs. So far, we have tested this
-# with:
-#
-# * Toolchains generated by Crosstool-NG
-# * Toolchains generated by Buildroot
-# * ARM, MIPS and PowerPC toolchains made available by
-# Codesourcery. For the MIPS toolchain, the -muclibc variant isn't
-# supported yet, only the default glibc-based variant is.
-#
-# The basic principle is the following
-#
-# 1. If the toolchain is not pre-installed, download and extract it
-# in $(TOOLCHAIN_EXTERNAL_DIR).
-#
-# 2. For all external toolchains, perform some checks on the
-# conformity between the toolchain configuration described in the
-# Buildroot menuconfig system, and the real configuration of the
-# external toolchain. This is for example important to make sure that
-# the Buildroot configuration system knows whether the toolchain
-# supports RPC, IPv6, locales, large files, etc. Unfortunately, these
-# things cannot be detected automatically, since the value of these
-# options (such as BR2_TOOLCHAIN_HAS_NATIVE_RPC) are needed at
-# configuration time because these options are used as dependencies
-# for other options. And at configuration time, we are not able to
-# retrieve the external toolchain configuration.
-#
-# 3. Copy the libraries needed at runtime to the target directory,
-# $(TARGET_DIR). Obviously, things such as the C library, the dynamic
-# loader and a few other utility libraries are needed if dynamic
-# applications are to be executed on the target system.
-#
-# 4. Copy the libraries and headers to the staging directory. This
-# will allow all further calls to gcc to be made using --sysroot
-# $(STAGING_DIR), which greatly simplifies the compilation of the
-# packages when using external toolchains. So in the end, only the
-# cross-compiler binaries remains external, all libraries and headers
-# are imported into the Buildroot tree.
-#
-# 5. Build a toolchain wrapper which executes the external toolchain
-# with a number of arguments (sysroot/march/mtune/..) hardcoded,
-# so we're sure the correct configuration is always used and the
-# toolchain behaves similar to an internal toolchain.
-# This toolchain wrapper and symlinks are installed into
-# $(HOST_DIR)/usr/bin like for the internal toolchains, and the rest
-# of Buildroot is handled identical for the 2 toolchain types.
-
-LIB_EXTERNAL_LIBS=ld*.so libc.so libcrypt.so libdl.so libgcc_s.so libm.so libnsl.so libresolv.so librt.so libutil.so
-LIB_EXTERNAL_LIBS+=$(call qstrip,$(BR2_TOOLCHAIN_EXTRA_EXTERNAL_LIBS))
-ifeq ($(BR2_TOOLCHAIN_EXTERNAL_GLIBC),y)
-LIB_EXTERNAL_LIBS+=libnss_files.so libnss_dns.so
-endif
-
-ifeq ($(BR2_INSTALL_LIBSTDCPP),y)
-USR_LIB_EXTERNAL_LIBS+=libstdc++.so
-endif
-
-ifeq ($(BR2_TOOLCHAIN_HAS_THREADS),y)
-LIB_EXTERNAL_LIBS+=libpthread.so
-ifneq ($(BR2_PACKAGE_GDB_SERVER)$(BR2_TOOLCHAIN_EXTERNAL_GDB_SERVER_COPY),)
-LIB_EXTERNAL_LIBS+=libthread_db.so
-endif # gdbserver
-endif # ! no threads
-
-# Details about sysroot directory selection.
-#
-# To find the sysroot directory:
-#
-# * We first try the -print-sysroot option, available in gcc 4.4.x
-# and in some Codesourcery toolchains.
-#
-# * If this option is not available, we fallback to the value of
-# --with-sysroot as visible in CROSS-gcc -v.
-#
-# When doing those tests, we don't pass any option to gcc that could
-# select a multilib variant (such as -march) as we want the "main"
-# sysroot, which contains all variants of the C library in the case of
-# multilib toolchains. We use the TARGET_CC_NO_SYSROOT variable, which
-# is the path of the cross-compiler, without the
-# --sysroot=$(STAGING_DIR), since what we want to find is the location
-# of the original toolchain sysroot. This "main" sysroot directory is
-# stored in SYSROOT_DIR.
-#
-# Then, multilib toolchains are a little bit more complicated, since
-# they in fact have multiple sysroots, one for each variant supported
-# by the toolchain. So we need to find the particular sysroot we're
-# interested in.
-#
-# To do so, we ask the compiler where its sysroot is by passing all
-# flags (including -march and al.), except the --sysroot flag since we
-# want to the compiler to tell us where its original sysroot
-# is. ARCH_SUBDIR will contain the subdirectory, in the main
-# SYSROOT_DIR, that corresponds to the selected architecture
-# variant. ARCH_SYSROOT_DIR will contain the full path to this
-# location.
-#
-# One might wonder why we don't just bother with ARCH_SYSROOT_DIR. The
-# fact is that in multilib toolchains, the header files are often only
-# present in the main sysroot, and only the libraries are available in
-# each variant-specific sysroot directory.
-
-
-TOOLCHAIN_EXTERNAL_PREFIX=$(call qstrip,$(BR2_TOOLCHAIN_EXTERNAL_PREFIX))
-ifeq ($(BR2_TOOLCHAIN_EXTERNAL_DOWNLOAD),y)
-TOOLCHAIN_EXTERNAL_DIR=$(HOST_DIR)/opt/ext-toolchain
-else
-TOOLCHAIN_EXTERNAL_DIR=$(call qstrip,$(BR2_TOOLCHAIN_EXTERNAL_PATH))
-endif
-
-ifeq ($(TOOLCHAIN_EXTERNAL_DIR),)
-ifneq ($(TOOLCHAIN_EXTERNAL_PREFIX),)
-# if no path set, figure it out from path
-TOOLCHAIN_EXTERNAL_BIN := $(shell dirname $(shell which $(TOOLCHAIN_EXTERNAL_PREFIX)-gcc))
-endif
-else
-ifeq ($(BR2_bfin),y)
-TOOLCHAIN_EXTERNAL_BIN := $(TOOLCHAIN_EXTERNAL_DIR)/$(TOOLCHAIN_EXTERNAL_PREFIX)/bin
-else
-TOOLCHAIN_EXTERNAL_BIN := $(TOOLCHAIN_EXTERNAL_DIR)/bin
-endif
-endif
-
-TOOLCHAIN_EXTERNAL_CROSS=$(TOOLCHAIN_EXTERNAL_BIN)/$(TOOLCHAIN_EXTERNAL_PREFIX)-
-TOOLCHAIN_EXTERNAL_CC=$(TOOLCHAIN_EXTERNAL_CROSS)gcc
-TOOLCHAIN_EXTERNAL_CXX=$(TOOLCHAIN_EXTERNAL_CROSS)g++
-TOOLCHAIN_EXTERNAL_READELF=$(TOOLCHAIN_EXTERNAL_CROSS)readelf
-TOOLCHAIN_EXTERNAL_WRAPPER_ARGS = -DBR_SYSROOT='"$(STAGING_SUBDIR)"'
-
-ifeq ($(filter $(HOST_DIR)/%,$(TOOLCHAIN_EXTERNAL_BIN)),)
-# TOOLCHAIN_EXTERNAL_BIN points outside HOST_DIR => absolute path
-TOOLCHAIN_EXTERNAL_WRAPPER_ARGS += \
- -DBR_CROSS_PATH_ABS='"$(TOOLCHAIN_EXTERNAL_BIN)"'
-else
-# TOOLCHAIN_EXTERNAL_BIN points inside HOST_DIR => relative path
-TOOLCHAIN_EXTERNAL_WRAPPER_ARGS += \
- -DBR_CROSS_PATH_REL='"$(TOOLCHAIN_EXTERNAL_BIN:$(HOST_DIR)/%=%)"'
-endif
-
-CC_TARGET_TUNE_:=$(call qstrip,$(BR2_GCC_TARGET_TUNE))
-ifeq ($(call qstrip,$(BR2_GCC_TARGET_CPU_REVISION)),)
-CC_TARGET_CPU_:=$(call qstrip,$(BR2_GCC_TARGET_CPU))
-else
-CC_TARGET_CPU_:=$(call qstrip,$(BR2_GCC_TARGET_CPU)-$(BR2_GCC_TARGET_CPU_REVISION))
-endif
-CC_TARGET_ARCH_:=$(call qstrip,$(BR2_GCC_TARGET_ARCH))
-CC_TARGET_ABI_:=$(call qstrip,$(BR2_GCC_TARGET_ABI))
-CC_TARGET_FPU_:=$(call qstrip,$(BR2_GCC_TARGET_FPU))
-CC_TARGET_FLOAT_ABI_:=$(call qstrip,$(BR2_GCC_TARGET_FLOAT_ABI))
-CC_TARGET_MODE_:=$(call qstrip,$(BR2_GCC_TARGET_MODE))
-
-# march/mtune/floating point mode needs to be passed to the external toolchain
-# to select the right multilib variant
-ifeq ($(BR2_x86_64),y)
-TOOLCHAIN_EXTERNAL_CFLAGS += -m64
-TOOLCHAIN_EXTERNAL_WRAPPER_ARGS += -DBR_64
-endif
-ifneq ($(CC_TARGET_TUNE_),)
-TOOLCHAIN_EXTERNAL_CFLAGS += -mtune=$(CC_TARGET_TUNE_)
-TOOLCHAIN_EXTERNAL_WRAPPER_ARGS += -DBR_TUNE='"$(CC_TARGET_TUNE_)"'
-endif
-ifneq ($(CC_TARGET_ARCH_),)
-TOOLCHAIN_EXTERNAL_CFLAGS += -march=$(CC_TARGET_ARCH_)
-TOOLCHAIN_EXTERNAL_WRAPPER_ARGS += -DBR_ARCH='"$(CC_TARGET_ARCH_)"'
-endif
-ifneq ($(CC_TARGET_CPU_),)
-TOOLCHAIN_EXTERNAL_CFLAGS += -mcpu=$(CC_TARGET_CPU_)
-TOOLCHAIN_EXTERNAL_WRAPPER_ARGS += -DBR_CPU='"$(CC_TARGET_CPU_)"'
-endif
-ifneq ($(CC_TARGET_ABI_),)
-TOOLCHAIN_EXTERNAL_CFLAGS += -mabi=$(CC_TARGET_ABI_)
-TOOLCHAIN_EXTERNAL_WRAPPER_ARGS += -DBR_ABI='"$(CC_TARGET_ABI_)"'
-endif
-ifneq ($(CC_TARGET_FPU_),)
-TOOLCHAIN_EXTERNAL_CFLAGS += -mfpu=$(CC_TARGET_FPU_)
-TOOLCHAIN_EXTERNAL_WRAPPER_ARGS += -DBR_FPU='"$(CC_TARGET_FPU_)"'
-endif
-ifneq ($(CC_TARGET_FLOAT_ABI_),)
-TOOLCHAIN_EXTERNAL_CFLAGS += -mfloat-abi=$(CC_TARGET_FLOAT_ABI_)
-TOOLCHAIN_EXTERNAL_WRAPPER_ARGS += -DBR_FLOAT_ABI='"$(CC_TARGET_FLOAT_ABI_)"'
-endif
-ifneq ($(CC_TARGET_MODE_),)
-TOOLCHAIN_EXTERNAL_CFLAGS += -m$(CC_TARGET_MODE_)
-TOOLCHAIN_EXTERNAL_WRAPPER_ARGS += -DBR_MODE='"$(CC_TARGET_MODE_)"'
-endif
-ifeq ($(BR2_BINFMT_FLAT),y)
-TOOLCHAIN_EXTERNAL_CFLAGS += -Wl,-elf2flt
-TOOLCHAIN_EXTERNAL_WRAPPER_ARGS += -DBR_BINFMT_FLAT
-endif
-
-ifneq ($(BR2_TARGET_OPTIMIZATION),)
-TOOLCHAIN_EXTERNAL_CFLAGS += $(call qstrip,$(BR2_TARGET_OPTIMIZATION))
-# We create a list like '"-mfoo", "-mbar", "-mbarfoo"' so that each
-# flag is a separate argument when used in execv() by the external
-# toolchain wrapper.
-TOOLCHAIN_EXTERNAL_WRAPPER_ARGS += -DBR_ADDITIONAL_CFLAGS='$(foreach f,$(call qstrip,$(BR2_TARGET_OPTIMIZATION)),"$(f)",)'
-endif
-
-ifeq ($(BR2_SOFT_FLOAT),y)
-TOOLCHAIN_EXTERNAL_CFLAGS += -msoft-float
-TOOLCHAIN_EXTERNAL_WRAPPER_ARGS += -DBR_SOFTFLOAT=1
-endif
-
-ifeq ($(BR2_TOOLCHAIN_EXTERNAL_DOWNLOAD),y)
-TOOLCHAIN_EXTERNAL_DEPENDENCIES = $(TOOLCHAIN_EXTERNAL_DIR)/.extracted
-endif
-
-ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_ARM201109),y)
-TOOLCHAIN_EXTERNAL_SITE = http://sourcery.mentor.com/public/gnu_toolchain/arm-none-linux-gnueabi/
-TOOLCHAIN_EXTERNAL_SOURCE = arm-2011.09-70-arm-none-linux-gnueabi-i686-pc-linux-gnu.tar.bz2
-else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_ARM201203),y)
-TOOLCHAIN_EXTERNAL_SITE = http://sourcery.mentor.com/public/gnu_toolchain/arm-none-linux-gnueabi/
-TOOLCHAIN_EXTERNAL_SOURCE = arm-2012.03-57-arm-none-linux-gnueabi-i686-pc-linux-gnu.tar.bz2
-else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_ARM201305),y)
-TOOLCHAIN_EXTERNAL_SITE = http://sourcery.mentor.com/public/gnu_toolchain/arm-none-linux-gnueabi/
-TOOLCHAIN_EXTERNAL_SOURCE = arm-2013.05-24-arm-none-linux-gnueabi-i686-pc-linux-gnu.tar.bz2
-else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_ARAGO_ARMV7A_201109),y)
-TOOLCHAIN_EXTERNAL_SITE = http://software-dl.ti.com/sdoemb/sdoemb_public_sw/arago_toolchain/2011_09/exports/
-TOOLCHAIN_EXTERNAL_SOURCE = arago-2011.09-armv7a-linux-gnueabi-sdk.tar.bz2
-define TOOLCHAIN_EXTERNAL_FIXUP_CMDS
- mv $(@D)/arago-2011.09/armv7a/* $(@D)/
- rm -rf $(@D)/arago-2011.09/
-endef
-else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_ARAGO_ARMV5TE_201109),y)
-TOOLCHAIN_EXTERNAL_SITE = http://software-dl.ti.com/sdoemb/sdoemb_public_sw/arago_toolchain/2011_09/exports/
-TOOLCHAIN_EXTERNAL_SOURCE = arago-2011.09-armv5te-linux-gnueabi-sdk.tar.bz2
-define TOOLCHAIN_EXTERNAL_FIXUP_CMDS
- mv $(@D)/arago-2011.09/armv5te/* $(@D)/
- rm -rf $(@D)/arago-2011.09/
-endef
-else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_LINARO_2013_06),y)
-TOOLCHAIN_EXTERNAL_SITE = https://releases.linaro.org/13.06/components/toolchain/binaries/
-TOOLCHAIN_EXTERNAL_SOURCE = gcc-linaro-arm-linux-gnueabihf-4.8-2013.06_linux.tar.xz
-else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_LINARO_2013_07),y)
-TOOLCHAIN_EXTERNAL_SITE = http://releases.linaro.org/13.07/components/toolchain/binaries/
-TOOLCHAIN_EXTERNAL_SOURCE = gcc-linaro-arm-linux-gnueabihf-4.8-2013.07-1_linux.tar.xz
-else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_LINARO_2013_08),y)
-TOOLCHAIN_EXTERNAL_SITE = http://releases.linaro.org/13.08/components/toolchain/binaries/
-TOOLCHAIN_EXTERNAL_SOURCE = gcc-linaro-arm-linux-gnueabihf-4.8-2013.08_linux.tar.xz
-else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_MIPS201203),y)
-TOOLCHAIN_EXTERNAL_SITE = http://sourcery.mentor.com/public/gnu_toolchain/mips-linux-gnu/
-TOOLCHAIN_EXTERNAL_SOURCE = mips-2012.03-63-mips-linux-gnu-i686-pc-linux-gnu.tar.bz2
-else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_MIPS201209),y)
-TOOLCHAIN_EXTERNAL_SITE = http://sourcery.mentor.com/public/gnu_toolchain/mips-linux-gnu/
-TOOLCHAIN_EXTERNAL_SOURCE = mips-2012.09-99-mips-linux-gnu-i686-pc-linux-gnu.tar.bz2
-else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_MIPS201305),y)
-TOOLCHAIN_EXTERNAL_SITE = http://sourcery.mentor.com/public/gnu_toolchain/mips-linux-gnu/
-TOOLCHAIN_EXTERNAL_SOURCE = mips-2013.05-66-mips-linux-gnu-i686-pc-linux-gnu.tar.bz2
-else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_NIOSII201305),y)
-TOOLCHAIN_EXTERNAL_SITE = http://sourcery.mentor.com/public/gnu_toolchain/nios2-linux-gnu/
-TOOLCHAIN_EXTERNAL_SOURCE = sourceryg++-2013.05-43-nios2-linux-gnu-i686-pc-linux-gnu.tar.bz2
-else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_POWERPC201009),y)
-TOOLCHAIN_EXTERNAL_SITE = http://sourcery.mentor.com/public/gnu_toolchain/powerpc-linux-gnu/
-TOOLCHAIN_EXTERNAL_SOURCE = freescale-2010.09-55-powerpc-linux-gnu-i686-pc-linux-gnu.tar.bz2
-else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_POWERPC201103),y)
-TOOLCHAIN_EXTERNAL_SITE = http://sourcery.mentor.com/public/gnu_toolchain/powerpc-linux-gnu/
-TOOLCHAIN_EXTERNAL_SOURCE = freescale-2011.03-38-powerpc-linux-gnu-i686-pc-linux-gnu.tar.bz2
-else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_SH201103),y)
-TOOLCHAIN_EXTERNAL_SITE = http://sourcery.mentor.com/public/gnu_toolchain/sh-linux-gnu/
-TOOLCHAIN_EXTERNAL_SOURCE = renesas-2011.03-37-sh-linux-gnu-i686-pc-linux-gnu.tar.bz2
-else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_SH201203),y)
-TOOLCHAIN_EXTERNAL_SITE = http://sourcery.mentor.com/public/gnu_toolchain/sh-linux-gnu/
-TOOLCHAIN_EXTERNAL_SOURCE = renesas-2012.03-35-sh-linux-gnu-i686-pc-linux-gnu.tar.bz2
-else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_SH201209),y)
-TOOLCHAIN_EXTERNAL_SITE = https://sourcery.mentor.com/public/gnu_toolchain/sh-linux-gnu/
-TOOLCHAIN_EXTERNAL_SOURCE = renesas-2012.09-61-sh-linux-gnu-i686-pc-linux-gnu.tar.bz2
-else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_SH2A_201009),y)
-TOOLCHAIN_EXTERNAL_SITE = http://sourcery.mentor.com/public/gnu_toolchain/sh-uclinux/
-TOOLCHAIN_EXTERNAL_SOURCE = renesas-2010.09-60-sh-uclinux-i686-pc-linux-gnu.tar.bz2
-else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_SH2A_201103),y)
-TOOLCHAIN_EXTERNAL_SITE = http://sourcery.mentor.com/public/gnu_toolchain/sh-uclinux/
-TOOLCHAIN_EXTERNAL_SOURCE = renesas-2011.03-36-sh-uclinux-i686-pc-linux-gnu.tar.bz2
-else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_X86_201109),y)
-TOOLCHAIN_EXTERNAL_SITE = https://sourcery.mentor.com/public/gnu_toolchain/i686-pc-linux-gnu/
-TOOLCHAIN_EXTERNAL_SOURCE = ia32-2011.09-24-i686-pc-linux-gnu-i386-linux.tar.bz2
-else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_X86_201203),y)
-TOOLCHAIN_EXTERNAL_SITE = http://sourcery.mentor.com/public/gnu_toolchain/i686-pc-linux-gnu/
-TOOLCHAIN_EXTERNAL_SOURCE = ia32-2012.03-27-i686-pc-linux-gnu-i386-linux.tar.bz2
-else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_X86_201209),y)
-TOOLCHAIN_EXTERNAL_SITE = https://sourcery.mentor.com/public/gnu_toolchain/i686-pc-linux-gnu/
-TOOLCHAIN_EXTERNAL_SOURCE = ia32-2012.09-62-i686-pc-linux-gnu-i386-linux.tar.bz2
-else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_BLACKFIN_UCLINUX_2012R1),y)
-TOOLCHAIN_EXTERNAL_SITE_1 = http://blackfin.uclinux.org/gf/download/frsrelease/559/9858/
-TOOLCHAIN_EXTERNAL_SOURCE_1 = blackfin-toolchain-2012R1-RC2.i386.tar.bz2
-TOOLCHAIN_EXTERNAL_SITE_2 = http://blackfin.uclinux.org/gf/download/frsrelease/559/9866/
-TOOLCHAIN_EXTERNAL_SOURCE_2 = blackfin-toolchain-uclibc-full-2012R1-RC2.i386.tar.bz2
-TOOLCHAIN_EXTERNAL_SOURCE = $(TOOLCHAIN_EXTERNAL_SOURCE_1) $(TOOLCHAIN_EXTERNAL_SOURCE_2)
-else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_BLACKFIN_UCLINUX_2012R2),y)
-TOOLCHAIN_EXTERNAL_SITE_1 = http://blackfin.uclinux.org/gf/download/frsrelease/588/10139/
-TOOLCHAIN_EXTERNAL_SOURCE_1 = blackfin-toolchain-2012R2-RC2.i386.tar.bz2
-TOOLCHAIN_EXTERNAL_SITE_2 = http://blackfin.uclinux.org/gf/download/frsrelease/588/10147/
-TOOLCHAIN_EXTERNAL_SOURCE_2 = blackfin-toolchain-uclibc-full-2012R2-RC2.i386.tar.bz2
-TOOLCHAIN_EXTERNAL_SOURCE = $(TOOLCHAIN_EXTERNAL_SOURCE_1) $(TOOLCHAIN_EXTERNAL_SOURCE_2)
-else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_XILINX_MICROBLAZEEL_14_3),y)
-TOOLCHAIN_EXTERNAL_SITE = http://sources.buildroot.net/
-TOOLCHAIN_EXTERNAL_SOURCE = lin32-microblazeel-unknown-linux-gnu_14.3_early.tar.xz
-else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_XILINX_MICROBLAZEEL_V2),y)
-TOOLCHAIN_EXTERNAL_SITE = http://sources.buildroot.net/
-TOOLCHAIN_EXTERNAL_SOURCE = microblazeel-unknown-linux-gnu.tgz
-else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_XILINX_MICROBLAZEBE_14_3),y)
-TOOLCHAIN_EXTERNAL_SITE = http://sources.buildroot.net/
-TOOLCHAIN_EXTERNAL_SOURCE = lin32-microblaze-unknown-linux-gnu_14.3_early.tar.xz
-else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_XILINX_MICROBLAZEBE_V2),y)
-TOOLCHAIN_EXTERNAL_SITE = http://sources.buildroot.net/
-TOOLCHAIN_EXTERNAL_SOURCE = microblaze-unknown-linux-gnu.tgz
-else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_LINARO_AARCH64_13_06),y)
-TOOLCHAIN_EXTERNAL_SITE = https://releases.linaro.org/13.06/components/toolchain/binaries/
-TOOLCHAIN_EXTERNAL_SOURCE = gcc-linaro-aarch64-linux-gnu-4.8-2013.06_linux.tar.xz
-else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_LINARO_AARCH64_13_07),y)
-TOOLCHAIN_EXTERNAL_SITE = http://releases.linaro.org/13.07/components/toolchain/binaries/
-TOOLCHAIN_EXTERNAL_SOURCE = gcc-linaro-aarch64-linux-gnu-4.8-2013.07-1_linux.tar.xz
-else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_LINARO_AARCH64_13_08),y)
-TOOLCHAIN_EXTERNAL_SITE = http://releases.linaro.org/13.08/components/toolchain/binaries/
-TOOLCHAIN_EXTERNAL_SOURCE = gcc-linaro-aarch64-linux-gnu-4.8-2013.08_linux.tar.xz
-else
-# Custom toolchain
-TOOLCHAIN_EXTERNAL_SITE = $(dir $(call qstrip,$(BR2_TOOLCHAIN_EXTERNAL_URL)))
-TOOLCHAIN_EXTERNAL_SOURCE = $(notdir $(call qstrip,$(BR2_TOOLCHAIN_EXTERNAL_URL)))
-
-# A value must be set (even if unused), otherwise the
-# $(DL_DIR)/$(TOOLCHAIN_EXTERNAL_SOURCE) rule would override the main
-# $(DL_DIR) rule
-ifeq (,$(TOOLCHAIN_EXTERNAL_SOURCE))
-TOOLCHAIN_EXTERNAL_SOURCE = none
-endif
-endif
-
-# Special handling for Blackfin toolchain, because of the split in two
-# tarballs, and the organization of tarball contents. The tarballs
-# contain ./opt/uClinux/{bfin-uclinux,bfin-linux-uclibc} directories,
-# which themselves contain the toolchain. This is why we strip more
-# components than usual.
-ifeq ($(BR2_TOOLCHAIN_EXTERNAL_BLACKFIN_UCLINUX_2012R1)$(BR2_TOOLCHAIN_EXTERNAL_BLACKFIN_UCLINUX_2012R2),y)
-$(DL_DIR)/$(TOOLCHAIN_EXTERNAL_SOURCE_1):
- $(call DOWNLOAD,$(TOOLCHAIN_EXTERNAL_SITE_1:/=)/$(TOOLCHAIN_EXTERNAL_SOURCE_1))
-
-$(DL_DIR)/$(TOOLCHAIN_EXTERNAL_SOURCE_2):
- $(call DOWNLOAD,$(TOOLCHAIN_EXTERNAL_SITE_2:/=)/$(TOOLCHAIN_EXTERNAL_SOURCE_2))
-
-$(TOOLCHAIN_EXTERNAL_DIR)/.extracted: $(DL_DIR)/$(TOOLCHAIN_EXTERNAL_SOURCE_1) $(DL_DIR)/$(TOOLCHAIN_EXTERNAL_SOURCE_2)
- mkdir -p $(@D)
- $(call suitable-extractor,$(TOOLCHAIN_EXTERNAL_SOURCE_1)) $(DL_DIR)/$(TOOLCHAIN_EXTERNAL_SOURCE_1) | \
- $(TAR) $(TAR_STRIP_COMPONENTS)=3 --hard-dereference -C $(@D) $(TAR_OPTIONS) -
- $(call suitable-extractor,$(TOOLCHAIN_EXTERNAL_SOURCE_2)) $(DL_DIR)/$(TOOLCHAIN_EXTERNAL_SOURCE_2) | \
- $(TAR) $(TAR_STRIP_COMPONENTS)=3 --hard-dereference -C $(@D) $(TAR_OPTIONS) -
- $(Q)touch $@
-else
-# Download and extraction of a toolchain
-$(DL_DIR)/$(TOOLCHAIN_EXTERNAL_SOURCE):
- $(call DOWNLOAD,$(TOOLCHAIN_EXTERNAL_SITE)$(TOOLCHAIN_EXTERNAL_SOURCE),$(TOOLCHAIN_EXTERNAL_SOURCE))
-
-$(TOOLCHAIN_EXTERNAL_DIR)/.extracted: $(DL_DIR)/$(TOOLCHAIN_EXTERNAL_SOURCE)
- mkdir -p $(@D)
- $(call suitable-extractor,$(TOOLCHAIN_EXTERNAL_SOURCE)) $^ | \
- $(TAR) $(TAR_STRIP_COMPONENTS)=1 --exclude='usr/lib/locale/*' -C $(@D) $(TAR_OPTIONS) -
- $(TOOLCHAIN_EXTERNAL_FIXUP_CMDS)
- $(Q)touch $@
-endif
-
-# Checks for an already installed toolchain: check the toolchain
-# location, check that it supports sysroot, and then verify that it
-# matches the configuration provided in Buildroot: ABI, C++ support,
-# type of C library and all C library features.
-$(STAMP_DIR)/ext-toolchain-checked: $(TOOLCHAIN_EXTERNAL_DEPENDENCIES)
- @$(call MESSAGE,"Checking external toolchain settings")
- $(Q)$(call check_cross_compiler_exists,$(TOOLCHAIN_EXTERNAL_CC))
- $(Q)LIBC_A_LOCATION=`readlink -f $$(LANG=C $(TOOLCHAIN_EXTERNAL_CC) -print-file-name=libc.a)` ; \
- SYSROOT_DIR=`echo $${LIBC_A_LOCATION} | sed -r -e 's:usr/lib(32|64)?/(.*/)?libc\.a::'` ; \
- if test -z "$${SYSROOT_DIR}" ; then \
- @echo "External toolchain doesn't support --sysroot. Cannot use." ; \
- exit 1 ; \
- fi ; \
- if test "$(BR2_arm)" = "y" ; then \
- $(call check_arm_abi,\
- "$(TOOLCHAIN_EXTERNAL_CC) $(TOOLCHAIN_EXTERNAL_CFLAGS)",\
- $(TOOLCHAIN_EXTERNAL_READELF)) ; \
- fi ; \
- if test "$(BR2_INSTALL_LIBSTDCPP)" = "y" ; then \
- $(call check_cplusplus,$(TOOLCHAIN_EXTERNAL_CXX)) ; \
- fi ; \
- if test "$(BR2_TOOLCHAIN_EXTERNAL_UCLIBC)" = "y" ; then \
- $(call check_uclibc,$${SYSROOT_DIR}) ; \
- else \
- $(call check_glibc,$${SYSROOT_DIR}) ; \
- fi
- $(Q)touch $@
-
-# Integration of the toolchain into Buildroot: find the main sysroot
-# and the variant-specific sysroot, then copy the needed libraries to
-# the $(TARGET_DIR) and copy the whole sysroot (libraries and headers)
-# to $(STAGING_DIR).
-#
-# Variables are defined as follows:
-#
-# LIBC_A_LOCATION: location of the libc.a file in the default
-# multilib variant (allows to find the main
-# sysroot directory)
-# Ex: /x-tools/mips-2011.03/mips-linux-gnu/libc/usr/lib/libc.a
-#
-# SYSROOT_DIR: the main sysroot directory, deduced from
-# LIBC_A_LOCATION by removing the
-# usr/lib[32|64]/libc.a part of the path.
-# Ex: /x-tools/mips-2011.03/mips-linux-gnu/libc/
-#
-# ARCH_LIBC_A_LOCATION: location of the libc.a file in the selected
-# multilib variant (taking into account the
-# CFLAGS). Allows to find the sysroot of the
-# selected multilib variant.
-# Ex: /x-tools/mips-2011.03/mips-linux-gnu/libc/mips16/soft-float/el/usr/lib/libc.a
-#
-# ARCH_SYSROOT_DIR: the sysroot of the selected multilib variant,
-# deduced from ARCH_LIBC_A_LOCATION by removing
-# usr/lib[32|64]/libc.a at the end of the path.
-# Ex: /x-tools/mips-2011.03/mips-linux-gnu/libc/mips16/soft-float/el/
-#
-# ARCH_LIB_DIR: 'lib', 'lib32' or 'lib64' depending on where libraries
-# are stored. Deduced from ARCH_LIBC_A_LOCATION by
-# looking at usr/lib??/libc.a.
-# Ex: lib
-#
-# ARCH_SUBDIR: the relative location of the sysroot of the selected
-# multilib variant compared to the main sysroot.
-# Ex: mips16/soft-float/el
-#
-# SUPPORT_LIB_DIR: some toolchains, such as recent Linaro toolchains,
-# store GCC support libraries (libstdc++,
-# libgcc_s, etc.) outside of the sysroot. In
-# this case, SUPPORT_LIB_DIR is set to a
-# non-empty value, and points to the directory
-# where these support libraries are
-# available. Those libraries will be copied to
-# our sysroot, and the directory will also be
-# considered when searching libraries for copy
-# to the target filesystem.
-
-$(STAMP_DIR)/ext-toolchain-installed: $(STAMP_DIR)/ext-toolchain-checked
- $(Q)LIBC_A_LOCATION=`readlink -f $$(LANG=C $(TOOLCHAIN_EXTERNAL_CC) -print-file-name=libc.a)` ; \
- SYSROOT_DIR=`echo $${LIBC_A_LOCATION} | sed -r -e 's:usr/lib(32|64)?/(.*/)?libc\.a::'` ; \
- if test -z "$${SYSROOT_DIR}" ; then \
- @echo "External toolchain doesn't support --sysroot. Cannot use." ; \
- exit 1 ; \
- fi ; \
- ARCH_LIBC_A_LOCATION=`readlink -f $$(LANG=C $(TOOLCHAIN_EXTERNAL_CC) $(TOOLCHAIN_EXTERNAL_CFLAGS) -print-file-name=libc.a)` ; \
- ARCH_SYSROOT_DIR=`echo $${ARCH_LIBC_A_LOCATION} | sed -r -e 's:usr/lib(32|64)?/(.*/)?libc\.a::'` ; \
- ARCH_LIB_DIR=`echo $${ARCH_LIBC_A_LOCATION} | sed -r -e 's:.*/usr/(lib(32|64)?)/(.*/)?libc.a:\1:'` ; \
- SUPPORT_LIB_DIR="" ; \
- if test `find $${ARCH_SYSROOT_DIR} -name 'libstdc++.a' | wc -l` -eq 0 ; then \
- LIBSTDCPP_A_LOCATION=$$(LANG=C $(TOOLCHAIN_EXTERNAL_CC) $(TOOLCHAIN_EXTERNAL_CFLAGS) -print-file-name=libstdc++.a) ; \
- if [ -e "$${LIBSTDCPP_A_LOCATION}" ]; then \
- SUPPORT_LIB_DIR=`readlink -f $${LIBSTDCPP_A_LOCATION} | sed -r -e 's:libstdc\+\+\.a::'` ; \
- fi ; \
- fi ; \
- ARCH_SUBDIR=`echo $${ARCH_SYSROOT_DIR} | sed -r -e "s:^$${SYSROOT_DIR}(.*)/$$:\1:"` ; \
- if test -z "$(BR2_PREFER_STATIC_LIB)" ; then \
- $(call MESSAGE,"Copying external toolchain libraries to target...") ; \
- for libs in $(LIB_EXTERNAL_LIBS); do \
- $(call copy_toolchain_lib_root,$${ARCH_SYSROOT_DIR},$${SUPPORT_LIB_DIR},$${ARCH_LIB_DIR},$$libs,/lib); \
- done ; \
- for libs in $(USR_LIB_EXTERNAL_LIBS); do \
- $(call copy_toolchain_lib_root,$${ARCH_SYSROOT_DIR},$${SUPPORT_LIB_DIR},$${ARCH_LIB_DIR},$$libs,/usr/lib); \
- done ; \
- fi ; \
- $(call MESSAGE,"Copying external toolchain sysroot to staging...") ; \
- $(call copy_toolchain_sysroot,$${SYSROOT_DIR},$${ARCH_SYSROOT_DIR},$${ARCH_SUBDIR},$${ARCH_LIB_DIR},$${SUPPORT_LIB_DIR}) ; \
- if test "$(BR2_TOOLCHAIN_EXTERNAL_GDB_SERVER_COPY)" = "y"; then \
- $(call MESSAGE,"Copying gdbserver") ; \
- gdbserver_found=0 ; \
- for d in $${ARCH_SYSROOT_DIR}/usr $${ARCH_SYSROOT_DIR}/../debug-root/usr $${ARCH_SYSROOT_DIR}/usr/$${ARCH_LIB_DIR} ; do \
- if test -f $${d}/bin/gdbserver ; then \
- install -m 0755 -D $${d}/bin/gdbserver $(TARGET_DIR)/usr/bin/gdbserver ; \
- gdbserver_found=1 ; \
- break ; \
- fi ; \
- done ; \
- if [ $${gdbserver_found} -eq 0 ] ; then \
- echo "Could not find gdbserver in external toolchain" ; \
- exit 1 ; \
- fi ; \
- fi ; \
- touch $@
-
-# Special installation target used on the Blackfin architecture when
-# FDPIC is not the primary binary format being used, but the user has
-# nonetheless requested the installation of the FDPIC libraries to the
-# target filesystem.
-$(STAMP_DIR)/ext-toolchain-bfin-fdpic-shared-installed: $(STAMP_DIR)/ext-toolchain-checked
- $(Q)$(call MESSAGE,"Install external toolchain FDPIC libraries to target...") ; \
- FDPIC_EXTERNAL_CC=$(dir $(TOOLCHAIN_EXTERNAL_CC))/../../bfin-linux-uclibc/bin/bfin-linux-uclibc-gcc ; \
- FDPIC_LIBC_A_LOCATION=`readlink -f $$(LANG=C $${FDPIC_EXTERNAL_CC} $(TOOLCHAIN_EXTERNAL_CFLAGS) -print-file-name=libc.a)` ; \
- FDPIC_SYSROOT_DIR=`echo $${FDPIC_LIBC_A_LOCATION} | sed -r -e 's:usr/lib(32|64)?/(.*/)?libc\.a::'` ; \
- FDPIC_LIB_DIR=`echo $${FDPIC_LIBC_A_LOCATION} | sed -r -e 's:.*/usr/(lib(32|64)?)/(.*/)?libc.a:\1:'` ; \
- FDPIC_SUPPORT_LIB_DIR="" ; \
- if test `find $${FDPIC_SYSROOT_DIR} -name 'libstdc++.a' | wc -l` -eq 0 ; then \
- FDPIC_LIBSTDCPP_A_LOCATION=$$(LANG=C $${FDPIC_EXTERNAL_CC} $(TOOLCHAIN_EXTERNAL_CFLAGS) -print-file-name=libstdc++.a) ; \
- if [ -e "$${FDPIC_LIBSTDCPP_A_LOCATION}" ]; then \
- FDPIC_SUPPORT_LIB_DIR=`readlink -f $${FDPIC_LIBSTDCPP_A_LOCATION} | sed -r -e 's:libstdc\+\+\.a::'` ; \
- fi ; \
- fi ; \
- for libs in $(LIB_EXTERNAL_LIBS); do \
- $(call copy_toolchain_lib_root,$${FDPIC_SYSROOT_DIR},$${FDPIC_SUPPORT_LIB_DIR},$${FDPIC_LIB_DIR},$$libs,/lib); \
- done ; \
- for libs in $(USR_LIB_EXTERNAL_LIBS); do \
- $(call copy_toolchain_lib_root,$${FDPIC_SYSROOT_DIR},$${FDPIC_SUPPORT_LIB_DIR},$${FDPIC_LIB_DIR},$$libs,/usr/lib); \
- done ; \
- touch $@
-
-# Special installation target used on the Blackfin architecture when
-# shared FLAT is not the primary format being used, but the user has
-# nonetheless requested the installation of the shared FLAT libraries
-# to the target filesystem. The flat libraries are found and linked
-# according to the index in name "libN.so". Index 1 is reserved for
-# the standard C library. Customer libraries can use 4 and above.
-$(STAMP_DIR)/ext-toolchain-bfin-shared-flat-installed: $(STAMP_DIR)/ext-toolchain-checked
- $(Q)$(call MESSAGE,"Install external toolchain FLAT libraries to target...") ; \
- FLAT_EXTERNAL_CC=$(dir $(TOOLCHAIN_EXTERNAL_CC))../../bfin-uclinux/bin/bfin-uclinux-gcc ; \
- FLAT_LIBC_A_LOCATION=`$${FLAT_EXTERNAL_CC} $(TOOLCHAIN_EXTERNAL_CFLAGS) -mid-shared-library -print-file-name=libc`; \
- if [ -f $${FLAT_LIBC_A_LOCATION} -a ! -h $${FLAT_LIBC_A_LOCATION} ] ; then \
- $(INSTALL) -D $${FLAT_LIBC_A_LOCATION} $(TARGET_DIR)/lib/lib1.so; \
- fi ; \
- touch $@
-
-TOOLCHAIN_EXTERNAL_INSTALL = $(STAMP_DIR)/ext-toolchain-installed
-
-ifeq ($(BR2_BFIN_INSTALL_FDPIC_SHARED),y)
-TOOLCHAIN_EXTERNAL_INSTALL += $(STAMP_DIR)/ext-toolchain-bfin-fdpic-shared-installed
-endif
-
-ifeq ($(BR2_BFIN_INSTALL_FLAT_SHARED),y)
-TOOLCHAIN_EXTERNAL_INSTALL += $(STAMP_DIR)/ext-toolchain-bfin-shared-flat-installed
-endif
-
-# Build toolchain wrapper for preprocessor, C and C++ compiler and setup
-# symlinks for everything else. Skip gdb symlink when we are building our
-# own gdb to prevent two gdb's in output/host/usr/bin.
-$(HOST_DIR)/usr/bin/ext-toolchain-wrapper: $(TOOLCHAIN_EXTERNAL_INSTALL)
- $(Q)$(call MESSAGE,"Building ext-toolchain wrapper")
- mkdir -p $(HOST_DIR)/usr/bin; cd $(HOST_DIR)/usr/bin; \
- for i in $(TOOLCHAIN_EXTERNAL_CROSS)*; do \
- base=$${i##*/}; \
- case "$$base" in \
- *cc|*cc-*|*++|*++-*|*cpp) \
- ln -sf $(@F) $$base; \
- ;; \
- *gdb|*gdbtui) \
- if test "$(BR2_PACKAGE_HOST_GDB)" != "y"; then \
- ln -sf $$(echo $$i | sed 's%^$(HOST_DIR)%../..%') .; \
- fi \
- ;; \
- *) \
- ln -sf $$(echo $$i | sed 's%^$(HOST_DIR)%../..%') .; \
- ;; \
- esac; \
- done ;
- # We use --hash-style=both to increase the compatibility of
- # the generated binary with older platforms
- $(HOSTCC) $(HOST_CFLAGS) $(TOOLCHAIN_EXTERNAL_WRAPPER_ARGS) -s -Wl,--hash-style=both \
- toolchain/toolchain-external/ext-toolchain-wrapper.c -o $@
-
-toolchain-external: dependencies $(HOST_DIR)/usr/bin/ext-toolchain-wrapper
-
-ifeq ($(BR2_TOOLCHAIN_EXTERNAL_DOWNLOAD),y)
-# download ext toolchain if so configured
-toolchain-external-source: $(addprefix $(DL_DIR)/,$(TOOLCHAIN_EXTERNAL_SOURCE))
-endif
--- /dev/null
+################################################################################
+#
+# toolchain-external
+#
+################################################################################
+
+#
+# This package implements the support for external toolchains, i.e
+# toolchains that have not been produced by Buildroot itself and that
+# Buildroot can download from the Web or that are already available on
+# the system on which Buildroot runs. So far, we have tested this
+# with:
+#
+# * Toolchains generated by Crosstool-NG
+# * Toolchains generated by Buildroot
+# * ARM, MIPS and PowerPC toolchains made available by
+# Codesourcery. For the MIPS toolchain, the -muclibc variant isn't
+# supported yet, only the default glibc-based variant is.
+#
+# The basic principle is the following
+#
+# 1. If the toolchain is not pre-installed, download and extract it
+# in $(TOOLCHAIN_EXTERNAL_INSTALL_DIR).
+#
+# 2. For all external toolchains, perform some checks on the
+# conformity between the toolchain configuration described in the
+# Buildroot menuconfig system, and the real configuration of the
+# external toolchain. This is for example important to make sure that
+# the Buildroot configuration system knows whether the toolchain
+# supports RPC, IPv6, locales, large files, etc. Unfortunately, these
+# things cannot be detected automatically, since the value of these
+# options (such as BR2_TOOLCHAIN_HAS_NATIVE_RPC) are needed at
+# configuration time because these options are used as dependencies
+# for other options. And at configuration time, we are not able to
+# retrieve the external toolchain configuration.
+#
+# 3. Copy the libraries needed at runtime to the target directory,
+# $(TARGET_DIR). Obviously, things such as the C library, the dynamic
+# loader and a few other utility libraries are needed if dynamic
+# applications are to be executed on the target system.
+#
+# 4. Copy the libraries and headers to the staging directory. This
+# will allow all further calls to gcc to be made using --sysroot
+# $(STAGING_DIR), which greatly simplifies the compilation of the
+# packages when using external toolchains. So in the end, only the
+# cross-compiler binaries remains external, all libraries and headers
+# are imported into the Buildroot tree.
+#
+# 5. Build a toolchain wrapper which executes the external toolchain
+# with a number of arguments (sysroot/march/mtune/..) hardcoded,
+# so we're sure the correct configuration is always used and the
+# toolchain behaves similar to an internal toolchain.
+# This toolchain wrapper and symlinks are installed into
+# $(HOST_DIR)/usr/bin like for the internal toolchains, and the rest
+# of Buildroot is handled identical for the 2 toolchain types.
+
+LIB_EXTERNAL_LIBS=ld*.so libc.so libcrypt.so libdl.so libgcc_s.so libm.so libnsl.so libresolv.so librt.so libutil.so
+LIB_EXTERNAL_LIBS+=$(call qstrip,$(BR2_TOOLCHAIN_EXTRA_EXTERNAL_LIBS))
+ifeq ($(BR2_TOOLCHAIN_EXTERNAL_GLIBC),y)
+LIB_EXTERNAL_LIBS+=libnss_files.so libnss_dns.so
+endif
+
+ifeq ($(BR2_INSTALL_LIBSTDCPP),y)
+USR_LIB_EXTERNAL_LIBS+=libstdc++.so
+endif
+
+ifeq ($(BR2_TOOLCHAIN_HAS_THREADS),y)
+LIB_EXTERNAL_LIBS+=libpthread.so
+ifneq ($(BR2_PACKAGE_GDB_SERVER)$(BR2_TOOLCHAIN_EXTERNAL_GDB_SERVER_COPY),)
+LIB_EXTERNAL_LIBS+=libthread_db.so
+endif # gdbserver
+endif # ! no threads
+
+# Details about sysroot directory selection.
+#
+# To find the sysroot directory:
+#
+# * We first try the -print-sysroot option, available in gcc 4.4.x
+# and in some Codesourcery toolchains.
+#
+# * If this option is not available, we fallback to the value of
+# --with-sysroot as visible in CROSS-gcc -v.
+#
+# When doing those tests, we don't pass any option to gcc that could
+# select a multilib variant (such as -march) as we want the "main"
+# sysroot, which contains all variants of the C library in the case of
+# multilib toolchains. We use the TARGET_CC_NO_SYSROOT variable, which
+# is the path of the cross-compiler, without the
+# --sysroot=$(STAGING_DIR), since what we want to find is the location
+# of the original toolchain sysroot. This "main" sysroot directory is
+# stored in SYSROOT_DIR.
+#
+# Then, multilib toolchains are a little bit more complicated, since
+# they in fact have multiple sysroots, one for each variant supported
+# by the toolchain. So we need to find the particular sysroot we're
+# interested in.
+#
+# To do so, we ask the compiler where its sysroot is by passing all
+# flags (including -march and al.), except the --sysroot flag since we
+# want to the compiler to tell us where its original sysroot
+# is. ARCH_SUBDIR will contain the subdirectory, in the main
+# SYSROOT_DIR, that corresponds to the selected architecture
+# variant. ARCH_SYSROOT_DIR will contain the full path to this
+# location.
+#
+# One might wonder why we don't just bother with ARCH_SYSROOT_DIR. The
+# fact is that in multilib toolchains, the header files are often only
+# present in the main sysroot, and only the libraries are available in
+# each variant-specific sysroot directory.
+
+
+TOOLCHAIN_EXTERNAL_PREFIX=$(call qstrip,$(BR2_TOOLCHAIN_EXTERNAL_PREFIX))
+ifeq ($(BR2_TOOLCHAIN_EXTERNAL_DOWNLOAD),y)
+TOOLCHAIN_EXTERNAL_INSTALL_DIR=$(HOST_DIR)/opt/ext-toolchain
+else
+TOOLCHAIN_EXTERNAL_INSTALL_DIR=$(call qstrip,$(BR2_TOOLCHAIN_EXTERNAL_PATH))
+endif
+
+ifeq ($(TOOLCHAIN_EXTERNAL_INSTALL_DIR),)
+ifneq ($(TOOLCHAIN_EXTERNAL_PREFIX),)
+# if no path set, figure it out from path
+TOOLCHAIN_EXTERNAL_BIN := $(shell dirname $(shell which $(TOOLCHAIN_EXTERNAL_PREFIX)-gcc))
+endif
+else
+ifeq ($(BR2_bfin),y)
+TOOLCHAIN_EXTERNAL_BIN := $(TOOLCHAIN_EXTERNAL_INSTALL_DIR)/$(TOOLCHAIN_EXTERNAL_PREFIX)/bin
+else
+TOOLCHAIN_EXTERNAL_BIN := $(TOOLCHAIN_EXTERNAL_INSTALL_DIR)/bin
+endif
+endif
+
+TOOLCHAIN_EXTERNAL_CROSS=$(TOOLCHAIN_EXTERNAL_BIN)/$(TOOLCHAIN_EXTERNAL_PREFIX)-
+TOOLCHAIN_EXTERNAL_CC=$(TOOLCHAIN_EXTERNAL_CROSS)gcc
+TOOLCHAIN_EXTERNAL_CXX=$(TOOLCHAIN_EXTERNAL_CROSS)g++
+TOOLCHAIN_EXTERNAL_READELF=$(TOOLCHAIN_EXTERNAL_CROSS)readelf
+TOOLCHAIN_EXTERNAL_WRAPPER_ARGS = -DBR_SYSROOT='"$(STAGING_SUBDIR)"'
+
+ifeq ($(filter $(HOST_DIR)/%,$(TOOLCHAIN_EXTERNAL_BIN)),)
+# TOOLCHAIN_EXTERNAL_BIN points outside HOST_DIR => absolute path
+TOOLCHAIN_EXTERNAL_WRAPPER_ARGS += \
+ -DBR_CROSS_PATH_ABS='"$(TOOLCHAIN_EXTERNAL_BIN)"'
+else
+# TOOLCHAIN_EXTERNAL_BIN points inside HOST_DIR => relative path
+TOOLCHAIN_EXTERNAL_WRAPPER_ARGS += \
+ -DBR_CROSS_PATH_REL='"$(TOOLCHAIN_EXTERNAL_BIN:$(HOST_DIR)/%=%)"'
+endif
+
+CC_TARGET_TUNE_:=$(call qstrip,$(BR2_GCC_TARGET_TUNE))
+ifeq ($(call qstrip,$(BR2_GCC_TARGET_CPU_REVISION)),)
+CC_TARGET_CPU_:=$(call qstrip,$(BR2_GCC_TARGET_CPU))
+else
+CC_TARGET_CPU_:=$(call qstrip,$(BR2_GCC_TARGET_CPU)-$(BR2_GCC_TARGET_CPU_REVISION))
+endif
+CC_TARGET_ARCH_:=$(call qstrip,$(BR2_GCC_TARGET_ARCH))
+CC_TARGET_ABI_:=$(call qstrip,$(BR2_GCC_TARGET_ABI))
+CC_TARGET_FPU_:=$(call qstrip,$(BR2_GCC_TARGET_FPU))
+CC_TARGET_FLOAT_ABI_:=$(call qstrip,$(BR2_GCC_TARGET_FLOAT_ABI))
+CC_TARGET_MODE_:=$(call qstrip,$(BR2_GCC_TARGET_MODE))
+
+# march/mtune/floating point mode needs to be passed to the external toolchain
+# to select the right multilib variant
+ifeq ($(BR2_x86_64),y)
+TOOLCHAIN_EXTERNAL_CFLAGS += -m64
+TOOLCHAIN_EXTERNAL_WRAPPER_ARGS += -DBR_64
+endif
+ifneq ($(CC_TARGET_TUNE_),)
+TOOLCHAIN_EXTERNAL_CFLAGS += -mtune=$(CC_TARGET_TUNE_)
+TOOLCHAIN_EXTERNAL_WRAPPER_ARGS += -DBR_TUNE='"$(CC_TARGET_TUNE_)"'
+endif
+ifneq ($(CC_TARGET_ARCH_),)
+TOOLCHAIN_EXTERNAL_CFLAGS += -march=$(CC_TARGET_ARCH_)
+TOOLCHAIN_EXTERNAL_WRAPPER_ARGS += -DBR_ARCH='"$(CC_TARGET_ARCH_)"'
+endif
+ifneq ($(CC_TARGET_CPU_),)
+TOOLCHAIN_EXTERNAL_CFLAGS += -mcpu=$(CC_TARGET_CPU_)
+TOOLCHAIN_EXTERNAL_WRAPPER_ARGS += -DBR_CPU='"$(CC_TARGET_CPU_)"'
+endif
+ifneq ($(CC_TARGET_ABI_),)
+TOOLCHAIN_EXTERNAL_CFLAGS += -mabi=$(CC_TARGET_ABI_)
+TOOLCHAIN_EXTERNAL_WRAPPER_ARGS += -DBR_ABI='"$(CC_TARGET_ABI_)"'
+endif
+ifneq ($(CC_TARGET_FPU_),)
+TOOLCHAIN_EXTERNAL_CFLAGS += -mfpu=$(CC_TARGET_FPU_)
+TOOLCHAIN_EXTERNAL_WRAPPER_ARGS += -DBR_FPU='"$(CC_TARGET_FPU_)"'
+endif
+ifneq ($(CC_TARGET_FLOAT_ABI_),)
+TOOLCHAIN_EXTERNAL_CFLAGS += -mfloat-abi=$(CC_TARGET_FLOAT_ABI_)
+TOOLCHAIN_EXTERNAL_WRAPPER_ARGS += -DBR_FLOAT_ABI='"$(CC_TARGET_FLOAT_ABI_)"'
+endif
+ifneq ($(CC_TARGET_MODE_),)
+TOOLCHAIN_EXTERNAL_CFLAGS += -m$(CC_TARGET_MODE_)
+TOOLCHAIN_EXTERNAL_WRAPPER_ARGS += -DBR_MODE='"$(CC_TARGET_MODE_)"'
+endif
+ifeq ($(BR2_BINFMT_FLAT),y)
+TOOLCHAIN_EXTERNAL_CFLAGS += -Wl,-elf2flt
+TOOLCHAIN_EXTERNAL_WRAPPER_ARGS += -DBR_BINFMT_FLAT
+endif
+
+ifneq ($(BR2_TARGET_OPTIMIZATION),)
+TOOLCHAIN_EXTERNAL_CFLAGS += $(call qstrip,$(BR2_TARGET_OPTIMIZATION))
+# We create a list like '"-mfoo", "-mbar", "-mbarfoo"' so that each
+# flag is a separate argument when used in execv() by the external
+# toolchain wrapper.
+TOOLCHAIN_EXTERNAL_WRAPPER_ARGS += -DBR_ADDITIONAL_CFLAGS='$(foreach f,$(call qstrip,$(BR2_TARGET_OPTIMIZATION)),"$(f)",)'
+endif
+
+ifeq ($(BR2_SOFT_FLOAT),y)
+TOOLCHAIN_EXTERNAL_CFLAGS += -msoft-float
+TOOLCHAIN_EXTERNAL_WRAPPER_ARGS += -DBR_SOFTFLOAT=1
+endif
+
+ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_ARM201109),y)
+TOOLCHAIN_EXTERNAL_SITE = http://sourcery.mentor.com/public/gnu_toolchain/arm-none-linux-gnueabi/
+TOOLCHAIN_EXTERNAL_SOURCE = arm-2011.09-70-arm-none-linux-gnueabi-i686-pc-linux-gnu.tar.bz2
+else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_ARM201203),y)
+TOOLCHAIN_EXTERNAL_SITE = http://sourcery.mentor.com/public/gnu_toolchain/arm-none-linux-gnueabi/
+TOOLCHAIN_EXTERNAL_SOURCE = arm-2012.03-57-arm-none-linux-gnueabi-i686-pc-linux-gnu.tar.bz2
+else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_ARM201305),y)
+TOOLCHAIN_EXTERNAL_SITE = http://sourcery.mentor.com/public/gnu_toolchain/arm-none-linux-gnueabi/
+TOOLCHAIN_EXTERNAL_SOURCE = arm-2013.05-24-arm-none-linux-gnueabi-i686-pc-linux-gnu.tar.bz2
+else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_ARAGO_ARMV7A_201109),y)
+TOOLCHAIN_EXTERNAL_SITE = http://software-dl.ti.com/sdoemb/sdoemb_public_sw/arago_toolchain/2011_09/exports/
+TOOLCHAIN_EXTERNAL_SOURCE = arago-2011.09-armv7a-linux-gnueabi-sdk.tar.bz2
+define TOOLCHAIN_EXTERNAL_FIXUP_CMDS
+ mv $(TOOLCHAIN_EXTERNAL_INSTALL_DIR)/arago-2011.09/armv7a/* $(TOOLCHAIN_EXTERNAL_INSTALL_DIR)/
+ rm -rf $(TOOLCHAIN_EXTERNAL_INSTALL_DIR)/arago-2011.09/
+endef
+else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_ARAGO_ARMV5TE_201109),y)
+TOOLCHAIN_EXTERNAL_SITE = http://software-dl.ti.com/sdoemb/sdoemb_public_sw/arago_toolchain/2011_09/exports/
+TOOLCHAIN_EXTERNAL_SOURCE = arago-2011.09-armv5te-linux-gnueabi-sdk.tar.bz2
+define TOOLCHAIN_EXTERNAL_FIXUP_CMDS
+ mv $(TOOLCHAIN_EXTERNAL_INSTALL_DIR)/arago-2011.09/armv5te/* $(TOOLCHAIN_EXTERNAL_INSTALL_DIR)/
+ rm -rf $(TOOLCHAIN_EXTERNAL_INSTALL_DIR)/arago-2011.09/
+endef
+else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_LINARO_2013_06),y)
+TOOLCHAIN_EXTERNAL_SITE = https://releases.linaro.org/13.06/components/toolchain/binaries/
+TOOLCHAIN_EXTERNAL_SOURCE = gcc-linaro-arm-linux-gnueabihf-4.8-2013.06_linux.tar.xz
+else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_LINARO_2013_07),y)
+TOOLCHAIN_EXTERNAL_SITE = http://releases.linaro.org/13.07/components/toolchain/binaries/
+TOOLCHAIN_EXTERNAL_SOURCE = gcc-linaro-arm-linux-gnueabihf-4.8-2013.07-1_linux.tar.xz
+else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_LINARO_2013_08),y)
+TOOLCHAIN_EXTERNAL_SITE = http://releases.linaro.org/13.08/components/toolchain/binaries/
+TOOLCHAIN_EXTERNAL_SOURCE = gcc-linaro-arm-linux-gnueabihf-4.8-2013.08_linux.tar.xz
+else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_MIPS201203),y)
+TOOLCHAIN_EXTERNAL_SITE = http://sourcery.mentor.com/public/gnu_toolchain/mips-linux-gnu/
+TOOLCHAIN_EXTERNAL_SOURCE = mips-2012.03-63-mips-linux-gnu-i686-pc-linux-gnu.tar.bz2
+else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_MIPS201209),y)
+TOOLCHAIN_EXTERNAL_SITE = http://sourcery.mentor.com/public/gnu_toolchain/mips-linux-gnu/
+TOOLCHAIN_EXTERNAL_SOURCE = mips-2012.09-99-mips-linux-gnu-i686-pc-linux-gnu.tar.bz2
+else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_MIPS201305),y)
+TOOLCHAIN_EXTERNAL_SITE = http://sourcery.mentor.com/public/gnu_toolchain/mips-linux-gnu/
+TOOLCHAIN_EXTERNAL_SOURCE = mips-2013.05-66-mips-linux-gnu-i686-pc-linux-gnu.tar.bz2
+else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_NIOSII201305),y)
+TOOLCHAIN_EXTERNAL_SITE = http://sourcery.mentor.com/public/gnu_toolchain/nios2-linux-gnu/
+TOOLCHAIN_EXTERNAL_SOURCE = sourceryg++-2013.05-43-nios2-linux-gnu-i686-pc-linux-gnu.tar.bz2
+else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_POWERPC201009),y)
+TOOLCHAIN_EXTERNAL_SITE = http://sourcery.mentor.com/public/gnu_toolchain/powerpc-linux-gnu/
+TOOLCHAIN_EXTERNAL_SOURCE = freescale-2010.09-55-powerpc-linux-gnu-i686-pc-linux-gnu.tar.bz2
+else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_POWERPC201103),y)
+TOOLCHAIN_EXTERNAL_SITE = http://sourcery.mentor.com/public/gnu_toolchain/powerpc-linux-gnu/
+TOOLCHAIN_EXTERNAL_SOURCE = freescale-2011.03-38-powerpc-linux-gnu-i686-pc-linux-gnu.tar.bz2
+else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_SH201103),y)
+TOOLCHAIN_EXTERNAL_SITE = http://sourcery.mentor.com/public/gnu_toolchain/sh-linux-gnu/
+TOOLCHAIN_EXTERNAL_SOURCE = renesas-2011.03-37-sh-linux-gnu-i686-pc-linux-gnu.tar.bz2
+else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_SH201203),y)
+TOOLCHAIN_EXTERNAL_SITE = http://sourcery.mentor.com/public/gnu_toolchain/sh-linux-gnu/
+TOOLCHAIN_EXTERNAL_SOURCE = renesas-2012.03-35-sh-linux-gnu-i686-pc-linux-gnu.tar.bz2
+else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_SH201209),y)
+TOOLCHAIN_EXTERNAL_SITE = https://sourcery.mentor.com/public/gnu_toolchain/sh-linux-gnu/
+TOOLCHAIN_EXTERNAL_SOURCE = renesas-2012.09-61-sh-linux-gnu-i686-pc-linux-gnu.tar.bz2
+else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_SH2A_201009),y)
+TOOLCHAIN_EXTERNAL_SITE = http://sourcery.mentor.com/public/gnu_toolchain/sh-uclinux/
+TOOLCHAIN_EXTERNAL_SOURCE = renesas-2010.09-60-sh-uclinux-i686-pc-linux-gnu.tar.bz2
+else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_SH2A_201103),y)
+TOOLCHAIN_EXTERNAL_SITE = http://sourcery.mentor.com/public/gnu_toolchain/sh-uclinux/
+TOOLCHAIN_EXTERNAL_SOURCE = renesas-2011.03-36-sh-uclinux-i686-pc-linux-gnu.tar.bz2
+else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_X86_201109),y)
+TOOLCHAIN_EXTERNAL_SITE = https://sourcery.mentor.com/public/gnu_toolchain/i686-pc-linux-gnu/
+TOOLCHAIN_EXTERNAL_SOURCE = ia32-2011.09-24-i686-pc-linux-gnu-i386-linux.tar.bz2
+else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_X86_201203),y)
+TOOLCHAIN_EXTERNAL_SITE = http://sourcery.mentor.com/public/gnu_toolchain/i686-pc-linux-gnu/
+TOOLCHAIN_EXTERNAL_SOURCE = ia32-2012.03-27-i686-pc-linux-gnu-i386-linux.tar.bz2
+else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_X86_201209),y)
+TOOLCHAIN_EXTERNAL_SITE = https://sourcery.mentor.com/public/gnu_toolchain/i686-pc-linux-gnu/
+TOOLCHAIN_EXTERNAL_SOURCE = ia32-2012.09-62-i686-pc-linux-gnu-i386-linux.tar.bz2
+else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_BLACKFIN_UCLINUX_2012R1),y)
+TOOLCHAIN_EXTERNAL_SITE = http://downloads.sourceforge.net/projects/adi-toolchain/files/2012R1-BF60X/2012R1-RC2-BF60X/i386/
+TOOLCHAIN_EXTERNAL_SOURCE = blackfin-toolchain-2012R1-RC2.i386.tar.bz2
+TOOLCHAIN_EXTERNAL_EXTRA_DOWNLOADS = blackfin-toolchain-uclibc-full-2012R1-RC2.i386.tar.bz2
+else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_BLACKFIN_UCLINUX_2012R2),y)
+TOOLCHAIN_EXTERNAL_SITE = http://downloads.sourceforge.net/project/adi-toolchain/2012R2/2012R2-RC2/i386/
+TOOLCHAIN_EXTERNAL_SOURCE = blackfin-toolchain-2012R2-RC2.i386.tar.bz2
+TOOLCHAIN_EXTERNAL_EXTRA_DOWNLOADS = blackfin-toolchain-uclibc-full-2012R2-RC2.i386.tar.bz2
+else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_XILINX_MICROBLAZEEL_14_3),y)
+TOOLCHAIN_EXTERNAL_SITE = http://sources.buildroot.net/
+TOOLCHAIN_EXTERNAL_SOURCE = lin32-microblazeel-unknown-linux-gnu_14.3_early.tar.xz
+else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_XILINX_MICROBLAZEEL_V2),y)
+TOOLCHAIN_EXTERNAL_SITE = http://sources.buildroot.net/
+TOOLCHAIN_EXTERNAL_SOURCE = microblazeel-unknown-linux-gnu.tgz
+else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_XILINX_MICROBLAZEBE_14_3),y)
+TOOLCHAIN_EXTERNAL_SITE = http://sources.buildroot.net/
+TOOLCHAIN_EXTERNAL_SOURCE = lin32-microblaze-unknown-linux-gnu_14.3_early.tar.xz
+else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_XILINX_MICROBLAZEBE_V2),y)
+TOOLCHAIN_EXTERNAL_SITE = http://sources.buildroot.net/
+TOOLCHAIN_EXTERNAL_SOURCE = microblaze-unknown-linux-gnu.tgz
+else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_LINARO_AARCH64_13_06),y)
+TOOLCHAIN_EXTERNAL_SITE = https://releases.linaro.org/13.06/components/toolchain/binaries/
+TOOLCHAIN_EXTERNAL_SOURCE = gcc-linaro-aarch64-linux-gnu-4.8-2013.06_linux.tar.xz
+else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_LINARO_AARCH64_13_07),y)
+TOOLCHAIN_EXTERNAL_SITE = http://releases.linaro.org/13.07/components/toolchain/binaries/
+TOOLCHAIN_EXTERNAL_SOURCE = gcc-linaro-aarch64-linux-gnu-4.8-2013.07-1_linux.tar.xz
+else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_LINARO_AARCH64_13_08),y)
+TOOLCHAIN_EXTERNAL_SITE = http://releases.linaro.org/13.08/components/toolchain/binaries/
+TOOLCHAIN_EXTERNAL_SOURCE = gcc-linaro-aarch64-linux-gnu-4.8-2013.08_linux.tar.xz
+else
+# Custom toolchain
+TOOLCHAIN_EXTERNAL_SITE = $(dir $(call qstrip,$(BR2_TOOLCHAIN_EXTERNAL_URL)))
+TOOLCHAIN_EXTERNAL_SOURCE = $(notdir $(call qstrip,$(BR2_TOOLCHAIN_EXTERNAL_URL)))
+endif
+
+TOOLCHAIN_EXTERNAL_INSTALL_STAGING = YES
+
+ifeq ($(BR2_TOOLCHAIN_EXTERNAL_BLACKFIN_UCLINUX_2012R1)$(BR2_TOOLCHAIN_EXTERNAL_BLACKFIN_UCLINUX_2012R2),y)
+# Special handling for Blackfin toolchain, because of the split in two
+# tarballs, and the organization of tarball contents. The tarballs
+# contain ./opt/uClinux/{bfin-uclinux,bfin-linux-uclibc} directories,
+# which themselves contain the toolchain. This is why we strip more
+# components than usual.
+define TOOLCHAIN_EXTERNAL_EXTRACT_CMDS
+ mkdir -p $(TOOLCHAIN_EXTERNAL_INSTALL_DIR)
+ $(call suitable-extractor,$(TOOLCHAIN_EXTERNAL_SOURCE)) $(DL_DIR)/$(TOOLCHAIN_EXTERNAL_SOURCE) | \
+ $(TAR) $(TAR_STRIP_COMPONENTS)=3 --hard-dereference -C $(TOOLCHAIN_EXTERNAL_INSTALL_DIR) $(TAR_OPTIONS) -
+ $(call suitable-extractor,$(TOOLCHAIN_EXTERNAL_EXTRA_DOWNLOADS)) $(DL_DIR)/$(TOOLCHAIN_EXTERNAL_EXTRA_DOWNLOADS) | \
+ $(TAR) $(TAR_STRIP_COMPONENTS)=3 --hard-dereference -C $(TOOLCHAIN_EXTERNAL_INSTALL_DIR) $(TAR_OPTIONS) -
+endef
+else ifneq ($(TOOLCHAIN_EXTERNAL_SOURCE),)
+# Normal handling of toolchain tarball extraction.
+define TOOLCHAIN_EXTERNAL_EXTRACT_CMDS
+ mkdir -p $(TOOLCHAIN_EXTERNAL_INSTALL_DIR)
+ $(call suitable-extractor,$(TOOLCHAIN_EXTERNAL_SOURCE)) $(DL_DIR)/$(TOOLCHAIN_EXTERNAL_SOURCE) | \
+ $(TAR) $(TAR_STRIP_COMPONENTS)=1 --exclude='usr/lib/locale/*' -C $(TOOLCHAIN_EXTERNAL_INSTALL_DIR) $(TAR_OPTIONS) -
+ $(TOOLCHAIN_EXTERNAL_FIXUP_CMDS)
+endef
+endif
+
+# Checks for an already installed toolchain: check the toolchain
+# location, check that it supports sysroot, and then verify that it
+# matches the configuration provided in Buildroot: ABI, C++ support,
+# type of C library and all C library features.
+define TOOLCHAIN_EXTERNAL_CONFIGURE_CMDS
+ $(Q)$(call check_cross_compiler_exists,$(TOOLCHAIN_EXTERNAL_CC))
+ $(Q)LIBC_A_LOCATION=`readlink -f $$(LANG=C $(TOOLCHAIN_EXTERNAL_CC) -print-file-name=libc.a)` ; \
+ SYSROOT_DIR=`echo $${LIBC_A_LOCATION} | sed -r -e 's:usr/lib(32|64)?/(.*/)?libc\.a::'` ; \
+ if test -z "$${SYSROOT_DIR}" ; then \
+ @echo "External toolchain doesn't support --sysroot. Cannot use." ; \
+ exit 1 ; \
+ fi ; \
+ if test "$(BR2_arm)" = "y" ; then \
+ $(call check_arm_abi,\
+ "$(TOOLCHAIN_EXTERNAL_CC) $(TOOLCHAIN_EXTERNAL_CFLAGS)",\
+ $(TOOLCHAIN_EXTERNAL_READELF)) ; \
+ fi ; \
+ if test "$(BR2_INSTALL_LIBSTDCPP)" = "y" ; then \
+ $(call check_cplusplus,$(TOOLCHAIN_EXTERNAL_CXX)) ; \
+ fi ; \
+ if test "$(BR2_TOOLCHAIN_EXTERNAL_UCLIBC)" = "y" ; then \
+ $(call check_uclibc,$${SYSROOT_DIR}) ; \
+ else \
+ $(call check_glibc,$${SYSROOT_DIR}) ; \
+ fi
+endef
+
+# Integration of the toolchain into Buildroot: find the main sysroot
+# and the variant-specific sysroot, then copy the needed libraries to
+# the $(TARGET_DIR) and copy the whole sysroot (libraries and headers)
+# to $(STAGING_DIR).
+#
+# Variables are defined as follows:
+#
+# LIBC_A_LOCATION: location of the libc.a file in the default
+# multilib variant (allows to find the main
+# sysroot directory)
+# Ex: /x-tools/mips-2011.03/mips-linux-gnu/libc/usr/lib/libc.a
+#
+# SYSROOT_DIR: the main sysroot directory, deduced from
+# LIBC_A_LOCATION by removing the
+# usr/lib[32|64]/libc.a part of the path.
+# Ex: /x-tools/mips-2011.03/mips-linux-gnu/libc/
+#
+# ARCH_LIBC_A_LOCATION: location of the libc.a file in the selected
+# multilib variant (taking into account the
+# CFLAGS). Allows to find the sysroot of the
+# selected multilib variant.
+# Ex: /x-tools/mips-2011.03/mips-linux-gnu/libc/mips16/soft-float/el/usr/lib/libc.a
+#
+# ARCH_SYSROOT_DIR: the sysroot of the selected multilib variant,
+# deduced from ARCH_LIBC_A_LOCATION by removing
+# usr/lib[32|64]/libc.a at the end of the path.
+# Ex: /x-tools/mips-2011.03/mips-linux-gnu/libc/mips16/soft-float/el/
+#
+# ARCH_LIB_DIR: 'lib', 'lib32' or 'lib64' depending on where libraries
+# are stored. Deduced from ARCH_LIBC_A_LOCATION by
+# looking at usr/lib??/libc.a.
+# Ex: lib
+#
+# ARCH_SUBDIR: the relative location of the sysroot of the selected
+# multilib variant compared to the main sysroot.
+# Ex: mips16/soft-float/el
+#
+# SUPPORT_LIB_DIR: some toolchains, such as recent Linaro toolchains,
+# store GCC support libraries (libstdc++,
+# libgcc_s, etc.) outside of the sysroot. In
+# this case, SUPPORT_LIB_DIR is set to a
+# non-empty value, and points to the directory
+# where these support libraries are
+# available. Those libraries will be copied to
+# our sysroot, and the directory will also be
+# considered when searching libraries for copy
+# to the target filesystem.
+
+define TOOLCHAIN_EXTERNAL_INSTALL_CORE
+ $(Q)LIBC_A_LOCATION=`readlink -f $$(LANG=C $(TOOLCHAIN_EXTERNAL_CC) -print-file-name=libc.a)` ; \
+ SYSROOT_DIR=`echo $${LIBC_A_LOCATION} | sed -r -e 's:usr/lib(32|64)?/(.*/)?libc\.a::'` ; \
+ if test -z "$${SYSROOT_DIR}" ; then \
+ @echo "External toolchain doesn't support --sysroot. Cannot use." ; \
+ exit 1 ; \
+ fi ; \
+ ARCH_LIBC_A_LOCATION=`readlink -f $$(LANG=C $(TOOLCHAIN_EXTERNAL_CC) $(TOOLCHAIN_EXTERNAL_CFLAGS) -print-file-name=libc.a)` ; \
+ ARCH_SYSROOT_DIR=`echo $${ARCH_LIBC_A_LOCATION} | sed -r -e 's:usr/lib(32|64)?/(.*/)?libc\.a::'` ; \
+ ARCH_LIB_DIR=`echo $${ARCH_LIBC_A_LOCATION} | sed -r -e 's:.*/usr/(lib(32|64)?)/(.*/)?libc.a:\1:'` ; \
+ SUPPORT_LIB_DIR="" ; \
+ if test `find $${ARCH_SYSROOT_DIR} -name 'libstdc++.a' | wc -l` -eq 0 ; then \
+ LIBSTDCPP_A_LOCATION=$$(LANG=C $(TOOLCHAIN_EXTERNAL_CC) $(TOOLCHAIN_EXTERNAL_CFLAGS) -print-file-name=libstdc++.a) ; \
+ if [ -e "$${LIBSTDCPP_A_LOCATION}" ]; then \
+ SUPPORT_LIB_DIR=`readlink -f $${LIBSTDCPP_A_LOCATION} | sed -r -e 's:libstdc\+\+\.a::'` ; \
+ fi ; \
+ fi ; \
+ ARCH_SUBDIR=`echo $${ARCH_SYSROOT_DIR} | sed -r -e "s:^$${SYSROOT_DIR}(.*)/$$:\1:"` ; \
+ if test -z "$(BR2_PREFER_STATIC_LIB)" ; then \
+ $(call MESSAGE,"Copying external toolchain libraries to target...") ; \
+ for libs in $(LIB_EXTERNAL_LIBS); do \
+ $(call copy_toolchain_lib_root,$${ARCH_SYSROOT_DIR},$${SUPPORT_LIB_DIR},$${ARCH_LIB_DIR},$$libs,/lib); \
+ done ; \
+ for libs in $(USR_LIB_EXTERNAL_LIBS); do \
+ $(call copy_toolchain_lib_root,$${ARCH_SYSROOT_DIR},$${SUPPORT_LIB_DIR},$${ARCH_LIB_DIR},$$libs,/usr/lib); \
+ done ; \
+ fi ; \
+ $(call MESSAGE,"Copying external toolchain sysroot to staging...") ; \
+ $(call copy_toolchain_sysroot,$${SYSROOT_DIR},$${ARCH_SYSROOT_DIR},$${ARCH_SUBDIR},$${ARCH_LIB_DIR},$${SUPPORT_LIB_DIR}) ; \
+ if test "$(BR2_TOOLCHAIN_EXTERNAL_GDB_SERVER_COPY)" = "y"; then \
+ $(call MESSAGE,"Copying gdbserver") ; \
+ gdbserver_found=0 ; \
+ for d in $${ARCH_SYSROOT_DIR}/usr $${ARCH_SYSROOT_DIR}/../debug-root/usr $${ARCH_SYSROOT_DIR}/usr/$${ARCH_LIB_DIR} ; do \
+ if test -f $${d}/bin/gdbserver ; then \
+ install -m 0755 -D $${d}/bin/gdbserver $(TARGET_DIR)/usr/bin/gdbserver ; \
+ gdbserver_found=1 ; \
+ break ; \
+ fi ; \
+ done ; \
+ if [ $${gdbserver_found} -eq 0 ] ; then \
+ echo "Could not find gdbserver in external toolchain" ; \
+ exit 1 ; \
+ fi ; \
+ fi
+endef
+
+# Special installation target used on the Blackfin architecture when
+# FDPIC is not the primary binary format being used, but the user has
+# nonetheless requested the installation of the FDPIC libraries to the
+# target filesystem.
+ifeq ($(BR2_BFIN_INSTALL_FDPIC_SHARED),y)
+define TOOLCHAIN_EXTERNAL_INSTALL_BFIN_FDPIC
+ $(Q)$(call MESSAGE,"Install external toolchain FDPIC libraries to target...") ; \
+ FDPIC_EXTERNAL_CC=$(dir $(TOOLCHAIN_EXTERNAL_CC))/../../bfin-linux-uclibc/bin/bfin-linux-uclibc-gcc ; \
+ FDPIC_LIBC_A_LOCATION=`readlink -f $$(LANG=C $${FDPIC_EXTERNAL_CC} $(TOOLCHAIN_EXTERNAL_CFLAGS) -print-file-name=libc.a)` ; \
+ FDPIC_SYSROOT_DIR=`echo $${FDPIC_LIBC_A_LOCATION} | sed -r -e 's:usr/lib(32|64)?/(.*/)?libc\.a::'` ; \
+ FDPIC_LIB_DIR=`echo $${FDPIC_LIBC_A_LOCATION} | sed -r -e 's:.*/usr/(lib(32|64)?)/(.*/)?libc.a:\1:'` ; \
+ FDPIC_SUPPORT_LIB_DIR="" ; \
+ if test `find $${FDPIC_SYSROOT_DIR} -name 'libstdc++.a' | wc -l` -eq 0 ; then \
+ FDPIC_LIBSTDCPP_A_LOCATION=$$(LANG=C $${FDPIC_EXTERNAL_CC} $(TOOLCHAIN_EXTERNAL_CFLAGS) -print-file-name=libstdc++.a) ; \
+ if [ -e "$${FDPIC_LIBSTDCPP_A_LOCATION}" ]; then \
+ FDPIC_SUPPORT_LIB_DIR=`readlink -f $${FDPIC_LIBSTDCPP_A_LOCATION} | sed -r -e 's:libstdc\+\+\.a::'` ; \
+ fi ; \
+ fi ; \
+ for libs in $(LIB_EXTERNAL_LIBS); do \
+ $(call copy_toolchain_lib_root,$${FDPIC_SYSROOT_DIR},$${FDPIC_SUPPORT_LIB_DIR},$${FDPIC_LIB_DIR},$$libs,/lib); \
+ done ; \
+ for libs in $(USR_LIB_EXTERNAL_LIBS); do \
+ $(call copy_toolchain_lib_root,$${FDPIC_SYSROOT_DIR},$${FDPIC_SUPPORT_LIB_DIR},$${FDPIC_LIB_DIR},$$libs,/usr/lib); \
+ done
+endef
+endif
+
+# Special installation target used on the Blackfin architecture when
+# shared FLAT is not the primary format being used, but the user has
+# nonetheless requested the installation of the shared FLAT libraries
+# to the target filesystem. The flat libraries are found and linked
+# according to the index in name "libN.so". Index 1 is reserved for
+# the standard C library. Customer libraries can use 4 and above.
+ifeq ($(BR2_BFIN_INSTALL_FLAT_SHARED),y)
+define TOOLCHAIN_EXTERNAL_INSTALL_BFIN_FLAT
+ $(Q)$(call MESSAGE,"Install external toolchain FLAT libraries to target...") ; \
+ FLAT_EXTERNAL_CC=$(dir $(TOOLCHAIN_EXTERNAL_CC))../../bfin-uclinux/bin/bfin-uclinux-gcc ; \
+ FLAT_LIBC_A_LOCATION=`$${FLAT_EXTERNAL_CC} $(TOOLCHAIN_EXTERNAL_CFLAGS) -mid-shared-library -print-file-name=libc`; \
+ if [ -f $${FLAT_LIBC_A_LOCATION} -a ! -h $${FLAT_LIBC_A_LOCATION} ] ; then \
+ $(INSTALL) -D $${FLAT_LIBC_A_LOCATION} $(TARGET_DIR)/lib/lib1.so; \
+ fi
+endef
+endif
+
+# Build toolchain wrapper for preprocessor, C and C++ compiler and setup
+# symlinks for everything else. Skip gdb symlink when we are building our
+# own gdb to prevent two gdb's in output/host/usr/bin.
+define TOOLCHAIN_EXTERNAL_INSTALL_WRAPPER
+ $(Q)$(call MESSAGE,"Building ext-toolchain wrapper")
+ mkdir -p $(HOST_DIR)/usr/bin; cd $(HOST_DIR)/usr/bin; \
+ for i in $(TOOLCHAIN_EXTERNAL_CROSS)*; do \
+ base=$${i##*/}; \
+ case "$$base" in \
+ *cc|*cc-*|*++|*++-*|*cpp) \
+ ln -sf ext-toolchain-wrapper $$base; \
+ ;; \
+ *gdb|*gdbtui) \
+ if test "$(BR2_PACKAGE_HOST_GDB)" != "y"; then \
+ ln -sf $$(echo $$i | sed 's%^$(HOST_DIR)%../..%') .; \
+ fi \
+ ;; \
+ *) \
+ ln -sf $$(echo $$i | sed 's%^$(HOST_DIR)%../..%') .; \
+ ;; \
+ esac; \
+ done ;
+ # We use --hash-style=both to increase the compatibility of
+ # the generated binary with older platforms
+ $(HOSTCC) $(HOST_CFLAGS) $(TOOLCHAIN_EXTERNAL_WRAPPER_ARGS) -s -Wl,--hash-style=both \
+ toolchain/toolchain-external/ext-toolchain-wrapper.c \
+ -o $(HOST_DIR)/usr/bin/ext-toolchain-wrapper
+endef
+
+# Even though we're installing things in both the staging, the host
+# and the target directory, we do everything within the
+# install-staging step, arbitrarily.
+define TOOLCHAIN_EXTERNAL_INSTALL_STAGING_CMDS
+ $(TOOLCHAIN_EXTERNAL_INSTALL_CORE)
+ $(TOOLCHAIN_EXTERNAL_INSTALL_BFIN_FDPIC)
+ $(TOOLCHAIN_EXTERNAL_INSTALL_BFIN_FLAT)
+ $(TOOLCHAIN_EXTERNAL_INSTALL_WRAPPER)
+endef
+
+$(eval $(generic-package))
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