toolchain-external: convert to the package infrastructure
This commit converts the 'toolchain-external' logic to the package infrastructure. The TOOLCHAIN_EXTERNAL_DIR variable (which points to where the toolchain is located) is renamed to TOOLCHAIN_EXTERNAL_INSTALL_DIR, because the former conflicts with the package infrastructure (which defines the <pkg>_DIR variable for each package as pointing to its build directory). The new _EXTRA_DOWNLOADS mechanism is used for Blackfin toolchains. The extract, configuration and installation steps are converted inside the <pkg>_EXTRACT_CMDS, <pkg>_CONFIGURE_CMDS and <pkg>_INSTALL_STAGING_CMDS. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Acked-by: Luca Ceresoli <luca@lucaceresoli.net> Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
This commit is contained in:
Thomas Petazzoni
Peter Korsgaard
parent
9934630fae
commit
d07d2bfeb2
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@ -1,4 +0,0 @@
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# Required includes for the external toolchain backend
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include toolchain/helpers.mk
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include toolchain/toolchain-external/ext-tool.mk
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@ -1,5 +1,11 @@
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################################################################################
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#
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# This file implements the support for external toolchains, i.e
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# toolchain-external
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#
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################################################################################
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#
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# This package implements the support for external toolchains, i.e
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# toolchains that have not been produced by Buildroot itself and that
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# Buildroot can download from the Web or that are already available on
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# the system on which Buildroot runs. So far, we have tested this
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@ -14,7 +20,7 @@
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# The basic principle is the following
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#
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# 1. If the toolchain is not pre-installed, download and extract it
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# in $(TOOLCHAIN_EXTERNAL_DIR).
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# in $(TOOLCHAIN_EXTERNAL_INSTALL_DIR).
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#
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# 2. For all external toolchains, perform some checks on the
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# conformity between the toolchain configuration described in the
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@ -105,21 +111,21 @@ endif # ! no threads
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TOOLCHAIN_EXTERNAL_PREFIX=$(call qstrip,$(BR2_TOOLCHAIN_EXTERNAL_PREFIX))
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ifeq ($(BR2_TOOLCHAIN_EXTERNAL_DOWNLOAD),y)
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TOOLCHAIN_EXTERNAL_DIR=$(HOST_DIR)/opt/ext-toolchain
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TOOLCHAIN_EXTERNAL_INSTALL_DIR=$(HOST_DIR)/opt/ext-toolchain
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else
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TOOLCHAIN_EXTERNAL_DIR=$(call qstrip,$(BR2_TOOLCHAIN_EXTERNAL_PATH))
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TOOLCHAIN_EXTERNAL_INSTALL_DIR=$(call qstrip,$(BR2_TOOLCHAIN_EXTERNAL_PATH))
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endif
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ifeq ($(TOOLCHAIN_EXTERNAL_DIR),)
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ifeq ($(TOOLCHAIN_EXTERNAL_INSTALL_DIR),)
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ifneq ($(TOOLCHAIN_EXTERNAL_PREFIX),)
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# if no path set, figure it out from path
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TOOLCHAIN_EXTERNAL_BIN := $(shell dirname $(shell which $(TOOLCHAIN_EXTERNAL_PREFIX)-gcc))
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endif
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else
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ifeq ($(BR2_bfin),y)
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TOOLCHAIN_EXTERNAL_BIN := $(TOOLCHAIN_EXTERNAL_DIR)/$(TOOLCHAIN_EXTERNAL_PREFIX)/bin
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TOOLCHAIN_EXTERNAL_BIN := $(TOOLCHAIN_EXTERNAL_INSTALL_DIR)/$(TOOLCHAIN_EXTERNAL_PREFIX)/bin
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else
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TOOLCHAIN_EXTERNAL_BIN := $(TOOLCHAIN_EXTERNAL_DIR)/bin
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TOOLCHAIN_EXTERNAL_BIN := $(TOOLCHAIN_EXTERNAL_INSTALL_DIR)/bin
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endif
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endif
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@ -203,10 +209,6 @@ TOOLCHAIN_EXTERNAL_CFLAGS += -msoft-float
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TOOLCHAIN_EXTERNAL_WRAPPER_ARGS += -DBR_SOFTFLOAT=1
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endif
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ifeq ($(BR2_TOOLCHAIN_EXTERNAL_DOWNLOAD),y)
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TOOLCHAIN_EXTERNAL_DEPENDENCIES = $(TOOLCHAIN_EXTERNAL_DIR)/.extracted
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endif
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ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_ARM201109),y)
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TOOLCHAIN_EXTERNAL_SITE = http://sourcery.mentor.com/public/gnu_toolchain/arm-none-linux-gnueabi/
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TOOLCHAIN_EXTERNAL_SOURCE = arm-2011.09-70-arm-none-linux-gnueabi-i686-pc-linux-gnu.tar.bz2
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@ -220,15 +222,15 @@ else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_ARAGO_ARMV7A_201109),y)
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TOOLCHAIN_EXTERNAL_SITE = http://software-dl.ti.com/sdoemb/sdoemb_public_sw/arago_toolchain/2011_09/exports/
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TOOLCHAIN_EXTERNAL_SOURCE = arago-2011.09-armv7a-linux-gnueabi-sdk.tar.bz2
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define TOOLCHAIN_EXTERNAL_FIXUP_CMDS
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mv $(@D)/arago-2011.09/armv7a/* $(@D)/
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rm -rf $(@D)/arago-2011.09/
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mv $(TOOLCHAIN_EXTERNAL_INSTALL_DIR)/arago-2011.09/armv7a/* $(TOOLCHAIN_EXTERNAL_INSTALL_DIR)/
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rm -rf $(TOOLCHAIN_EXTERNAL_INSTALL_DIR)/arago-2011.09/
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endef
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else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_ARAGO_ARMV5TE_201109),y)
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TOOLCHAIN_EXTERNAL_SITE = http://software-dl.ti.com/sdoemb/sdoemb_public_sw/arago_toolchain/2011_09/exports/
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TOOLCHAIN_EXTERNAL_SOURCE = arago-2011.09-armv5te-linux-gnueabi-sdk.tar.bz2
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define TOOLCHAIN_EXTERNAL_FIXUP_CMDS
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mv $(@D)/arago-2011.09/armv5te/* $(@D)/
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rm -rf $(@D)/arago-2011.09/
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mv $(TOOLCHAIN_EXTERNAL_INSTALL_DIR)/arago-2011.09/armv5te/* $(TOOLCHAIN_EXTERNAL_INSTALL_DIR)/
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rm -rf $(TOOLCHAIN_EXTERNAL_INSTALL_DIR)/arago-2011.09/
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endef
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else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_LINARO_2013_06),y)
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TOOLCHAIN_EXTERNAL_SITE = https://releases.linaro.org/13.06/components/toolchain/binaries/
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@ -282,17 +284,13 @@ else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_X86_201209),y)
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TOOLCHAIN_EXTERNAL_SITE = https://sourcery.mentor.com/public/gnu_toolchain/i686-pc-linux-gnu/
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TOOLCHAIN_EXTERNAL_SOURCE = ia32-2012.09-62-i686-pc-linux-gnu-i386-linux.tar.bz2
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else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_BLACKFIN_UCLINUX_2012R1),y)
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TOOLCHAIN_EXTERNAL_SITE_1 = http://blackfin.uclinux.org/gf/download/frsrelease/559/9858/
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TOOLCHAIN_EXTERNAL_SOURCE_1 = blackfin-toolchain-2012R1-RC2.i386.tar.bz2
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TOOLCHAIN_EXTERNAL_SITE_2 = http://blackfin.uclinux.org/gf/download/frsrelease/559/9866/
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TOOLCHAIN_EXTERNAL_SOURCE_2 = blackfin-toolchain-uclibc-full-2012R1-RC2.i386.tar.bz2
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TOOLCHAIN_EXTERNAL_SOURCE = $(TOOLCHAIN_EXTERNAL_SOURCE_1) $(TOOLCHAIN_EXTERNAL_SOURCE_2)
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TOOLCHAIN_EXTERNAL_SITE = http://downloads.sourceforge.net/projects/adi-toolchain/files/2012R1-BF60X/2012R1-RC2-BF60X/i386/
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TOOLCHAIN_EXTERNAL_SOURCE = blackfin-toolchain-2012R1-RC2.i386.tar.bz2
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TOOLCHAIN_EXTERNAL_EXTRA_DOWNLOADS = blackfin-toolchain-uclibc-full-2012R1-RC2.i386.tar.bz2
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else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_BLACKFIN_UCLINUX_2012R2),y)
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TOOLCHAIN_EXTERNAL_SITE_1 = http://blackfin.uclinux.org/gf/download/frsrelease/588/10139/
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TOOLCHAIN_EXTERNAL_SOURCE_1 = blackfin-toolchain-2012R2-RC2.i386.tar.bz2
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TOOLCHAIN_EXTERNAL_SITE_2 = http://blackfin.uclinux.org/gf/download/frsrelease/588/10147/
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TOOLCHAIN_EXTERNAL_SOURCE_2 = blackfin-toolchain-uclibc-full-2012R2-RC2.i386.tar.bz2
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TOOLCHAIN_EXTERNAL_SOURCE = $(TOOLCHAIN_EXTERNAL_SOURCE_1) $(TOOLCHAIN_EXTERNAL_SOURCE_2)
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TOOLCHAIN_EXTERNAL_SITE = http://downloads.sourceforge.net/project/adi-toolchain/2012R2/2012R2-RC2/i386/
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TOOLCHAIN_EXTERNAL_SOURCE = blackfin-toolchain-2012R2-RC2.i386.tar.bz2
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TOOLCHAIN_EXTERNAL_EXTRA_DOWNLOADS = blackfin-toolchain-uclibc-full-2012R2-RC2.i386.tar.bz2
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else ifeq ($(BR2_TOOLCHAIN_EXTERNAL_XILINX_MICROBLAZEEL_14_3),y)
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TOOLCHAIN_EXTERNAL_SITE = http://sources.buildroot.net/
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TOOLCHAIN_EXTERNAL_SOURCE = lin32-microblazeel-unknown-linux-gnu_14.3_early.tar.xz
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@ -318,53 +316,38 @@ else
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# Custom toolchain
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TOOLCHAIN_EXTERNAL_SITE = $(dir $(call qstrip,$(BR2_TOOLCHAIN_EXTERNAL_URL)))
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TOOLCHAIN_EXTERNAL_SOURCE = $(notdir $(call qstrip,$(BR2_TOOLCHAIN_EXTERNAL_URL)))
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# A value must be set (even if unused), otherwise the
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# $(DL_DIR)/$(TOOLCHAIN_EXTERNAL_SOURCE) rule would override the main
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# $(DL_DIR) rule
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ifeq (,$(TOOLCHAIN_EXTERNAL_SOURCE))
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TOOLCHAIN_EXTERNAL_SOURCE = none
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endif
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endif
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TOOLCHAIN_EXTERNAL_INSTALL_STAGING = YES
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ifeq ($(BR2_TOOLCHAIN_EXTERNAL_BLACKFIN_UCLINUX_2012R1)$(BR2_TOOLCHAIN_EXTERNAL_BLACKFIN_UCLINUX_2012R2),y)
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# Special handling for Blackfin toolchain, because of the split in two
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# tarballs, and the organization of tarball contents. The tarballs
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# contain ./opt/uClinux/{bfin-uclinux,bfin-linux-uclibc} directories,
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# which themselves contain the toolchain. This is why we strip more
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# components than usual.
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ifeq ($(BR2_TOOLCHAIN_EXTERNAL_BLACKFIN_UCLINUX_2012R1)$(BR2_TOOLCHAIN_EXTERNAL_BLACKFIN_UCLINUX_2012R2),y)
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$(DL_DIR)/$(TOOLCHAIN_EXTERNAL_SOURCE_1):
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$(call DOWNLOAD,$(TOOLCHAIN_EXTERNAL_SITE_1:/=)/$(TOOLCHAIN_EXTERNAL_SOURCE_1))
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$(DL_DIR)/$(TOOLCHAIN_EXTERNAL_SOURCE_2):
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$(call DOWNLOAD,$(TOOLCHAIN_EXTERNAL_SITE_2:/=)/$(TOOLCHAIN_EXTERNAL_SOURCE_2))
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$(TOOLCHAIN_EXTERNAL_DIR)/.extracted: $(DL_DIR)/$(TOOLCHAIN_EXTERNAL_SOURCE_1) $(DL_DIR)/$(TOOLCHAIN_EXTERNAL_SOURCE_2)
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mkdir -p $(@D)
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$(call suitable-extractor,$(TOOLCHAIN_EXTERNAL_SOURCE_1)) $(DL_DIR)/$(TOOLCHAIN_EXTERNAL_SOURCE_1) | \
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$(TAR) $(TAR_STRIP_COMPONENTS)=3 --hard-dereference -C $(@D) $(TAR_OPTIONS) -
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$(call suitable-extractor,$(TOOLCHAIN_EXTERNAL_SOURCE_2)) $(DL_DIR)/$(TOOLCHAIN_EXTERNAL_SOURCE_2) | \
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$(TAR) $(TAR_STRIP_COMPONENTS)=3 --hard-dereference -C $(@D) $(TAR_OPTIONS) -
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$(Q)touch $@
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else
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# Download and extraction of a toolchain
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$(DL_DIR)/$(TOOLCHAIN_EXTERNAL_SOURCE):
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$(call DOWNLOAD,$(TOOLCHAIN_EXTERNAL_SITE)$(TOOLCHAIN_EXTERNAL_SOURCE),$(TOOLCHAIN_EXTERNAL_SOURCE))
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$(TOOLCHAIN_EXTERNAL_DIR)/.extracted: $(DL_DIR)/$(TOOLCHAIN_EXTERNAL_SOURCE)
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mkdir -p $(@D)
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$(call suitable-extractor,$(TOOLCHAIN_EXTERNAL_SOURCE)) $^ | \
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$(TAR) $(TAR_STRIP_COMPONENTS)=1 --exclude='usr/lib/locale/*' -C $(@D) $(TAR_OPTIONS) -
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define TOOLCHAIN_EXTERNAL_EXTRACT_CMDS
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mkdir -p $(TOOLCHAIN_EXTERNAL_INSTALL_DIR)
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$(call suitable-extractor,$(TOOLCHAIN_EXTERNAL_SOURCE)) $(DL_DIR)/$(TOOLCHAIN_EXTERNAL_SOURCE) | \
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$(TAR) $(TAR_STRIP_COMPONENTS)=3 --hard-dereference -C $(TOOLCHAIN_EXTERNAL_INSTALL_DIR) $(TAR_OPTIONS) -
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$(call suitable-extractor,$(TOOLCHAIN_EXTERNAL_EXTRA_DOWNLOADS)) $(DL_DIR)/$(TOOLCHAIN_EXTERNAL_EXTRA_DOWNLOADS) | \
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$(TAR) $(TAR_STRIP_COMPONENTS)=3 --hard-dereference -C $(TOOLCHAIN_EXTERNAL_INSTALL_DIR) $(TAR_OPTIONS) -
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endef
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else ifneq ($(TOOLCHAIN_EXTERNAL_SOURCE),)
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# Normal handling of toolchain tarball extraction.
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define TOOLCHAIN_EXTERNAL_EXTRACT_CMDS
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mkdir -p $(TOOLCHAIN_EXTERNAL_INSTALL_DIR)
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$(call suitable-extractor,$(TOOLCHAIN_EXTERNAL_SOURCE)) $(DL_DIR)/$(TOOLCHAIN_EXTERNAL_SOURCE) | \
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$(TAR) $(TAR_STRIP_COMPONENTS)=1 --exclude='usr/lib/locale/*' -C $(TOOLCHAIN_EXTERNAL_INSTALL_DIR) $(TAR_OPTIONS) -
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$(TOOLCHAIN_EXTERNAL_FIXUP_CMDS)
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$(Q)touch $@
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endef
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endif
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# Checks for an already installed toolchain: check the toolchain
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# location, check that it supports sysroot, and then verify that it
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# matches the configuration provided in Buildroot: ABI, C++ support,
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# type of C library and all C library features.
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$(STAMP_DIR)/ext-toolchain-checked: $(TOOLCHAIN_EXTERNAL_DEPENDENCIES)
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@$(call MESSAGE,"Checking external toolchain settings")
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define TOOLCHAIN_EXTERNAL_CONFIGURE_CMDS
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$(Q)$(call check_cross_compiler_exists,$(TOOLCHAIN_EXTERNAL_CC))
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$(Q)LIBC_A_LOCATION=`readlink -f $$(LANG=C $(TOOLCHAIN_EXTERNAL_CC) -print-file-name=libc.a)` ; \
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SYSROOT_DIR=`echo $${LIBC_A_LOCATION} | sed -r -e 's:usr/lib(32|64)?/(.*/)?libc\.a::'` ; \
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@ -385,7 +368,7 @@ $(STAMP_DIR)/ext-toolchain-checked: $(TOOLCHAIN_EXTERNAL_DEPENDENCIES)
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else \
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$(call check_glibc,$${SYSROOT_DIR}) ; \
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fi
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$(Q)touch $@
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endef
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# Integration of the toolchain into Buildroot: find the main sysroot
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# and the variant-specific sysroot, then copy the needed libraries to
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@ -435,7 +418,7 @@ $(STAMP_DIR)/ext-toolchain-checked: $(TOOLCHAIN_EXTERNAL_DEPENDENCIES)
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# considered when searching libraries for copy
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# to the target filesystem.
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$(STAMP_DIR)/ext-toolchain-installed: $(STAMP_DIR)/ext-toolchain-checked
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define TOOLCHAIN_EXTERNAL_INSTALL_CORE
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$(Q)LIBC_A_LOCATION=`readlink -f $$(LANG=C $(TOOLCHAIN_EXTERNAL_CC) -print-file-name=libc.a)` ; \
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SYSROOT_DIR=`echo $${LIBC_A_LOCATION} | sed -r -e 's:usr/lib(32|64)?/(.*/)?libc\.a::'` ; \
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if test -z "$${SYSROOT_DIR}" ; then \
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@ -478,14 +461,15 @@ $(STAMP_DIR)/ext-toolchain-installed: $(STAMP_DIR)/ext-toolchain-checked
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echo "Could not find gdbserver in external toolchain" ; \
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exit 1 ; \
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fi ; \
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fi ; \
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touch $@
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fi
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endef
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# Special installation target used on the Blackfin architecture when
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# FDPIC is not the primary binary format being used, but the user has
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# nonetheless requested the installation of the FDPIC libraries to the
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# target filesystem.
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$(STAMP_DIR)/ext-toolchain-bfin-fdpic-shared-installed: $(STAMP_DIR)/ext-toolchain-checked
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ifeq ($(BR2_BFIN_INSTALL_FDPIC_SHARED),y)
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define TOOLCHAIN_EXTERNAL_INSTALL_BFIN_FDPIC
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$(Q)$(call MESSAGE,"Install external toolchain FDPIC libraries to target...") ; \
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FDPIC_EXTERNAL_CC=$(dir $(TOOLCHAIN_EXTERNAL_CC))/../../bfin-linux-uclibc/bin/bfin-linux-uclibc-gcc ; \
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FDPIC_LIBC_A_LOCATION=`readlink -f $$(LANG=C $${FDPIC_EXTERNAL_CC} $(TOOLCHAIN_EXTERNAL_CFLAGS) -print-file-name=libc.a)` ; \
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@ -503,8 +487,9 @@ $(STAMP_DIR)/ext-toolchain-bfin-fdpic-shared-installed: $(STAMP_DIR)/ext-toolcha
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done ; \
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for libs in $(USR_LIB_EXTERNAL_LIBS); do \
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$(call copy_toolchain_lib_root,$${FDPIC_SYSROOT_DIR},$${FDPIC_SUPPORT_LIB_DIR},$${FDPIC_LIB_DIR},$$libs,/usr/lib); \
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done ; \
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touch $@
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done
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endef
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endif
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# Special installation target used on the Blackfin architecture when
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# shared FLAT is not the primary format being used, but the user has
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@ -512,36 +497,28 @@ $(STAMP_DIR)/ext-toolchain-bfin-fdpic-shared-installed: $(STAMP_DIR)/ext-toolcha
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# to the target filesystem. The flat libraries are found and linked
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# according to the index in name "libN.so". Index 1 is reserved for
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# the standard C library. Customer libraries can use 4 and above.
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$(STAMP_DIR)/ext-toolchain-bfin-shared-flat-installed: $(STAMP_DIR)/ext-toolchain-checked
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ifeq ($(BR2_BFIN_INSTALL_FLAT_SHARED),y)
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define TOOLCHAIN_EXTERNAL_INSTALL_BFIN_FLAT
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$(Q)$(call MESSAGE,"Install external toolchain FLAT libraries to target...") ; \
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FLAT_EXTERNAL_CC=$(dir $(TOOLCHAIN_EXTERNAL_CC))../../bfin-uclinux/bin/bfin-uclinux-gcc ; \
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FLAT_LIBC_A_LOCATION=`$${FLAT_EXTERNAL_CC} $(TOOLCHAIN_EXTERNAL_CFLAGS) -mid-shared-library -print-file-name=libc`; \
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if [ -f $${FLAT_LIBC_A_LOCATION} -a ! -h $${FLAT_LIBC_A_LOCATION} ] ; then \
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$(INSTALL) -D $${FLAT_LIBC_A_LOCATION} $(TARGET_DIR)/lib/lib1.so; \
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fi ; \
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touch $@
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TOOLCHAIN_EXTERNAL_INSTALL = $(STAMP_DIR)/ext-toolchain-installed
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ifeq ($(BR2_BFIN_INSTALL_FDPIC_SHARED),y)
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TOOLCHAIN_EXTERNAL_INSTALL += $(STAMP_DIR)/ext-toolchain-bfin-fdpic-shared-installed
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endif
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ifeq ($(BR2_BFIN_INSTALL_FLAT_SHARED),y)
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TOOLCHAIN_EXTERNAL_INSTALL += $(STAMP_DIR)/ext-toolchain-bfin-shared-flat-installed
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fi
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endef
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endif
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# Build toolchain wrapper for preprocessor, C and C++ compiler and setup
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# symlinks for everything else. Skip gdb symlink when we are building our
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# own gdb to prevent two gdb's in output/host/usr/bin.
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$(HOST_DIR)/usr/bin/ext-toolchain-wrapper: $(TOOLCHAIN_EXTERNAL_INSTALL)
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define TOOLCHAIN_EXTERNAL_INSTALL_WRAPPER
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$(Q)$(call MESSAGE,"Building ext-toolchain wrapper")
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mkdir -p $(HOST_DIR)/usr/bin; cd $(HOST_DIR)/usr/bin; \
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for i in $(TOOLCHAIN_EXTERNAL_CROSS)*; do \
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base=$${i##*/}; \
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case "$$base" in \
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*cc|*cc-*|*++|*++-*|*cpp) \
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ln -sf $(@F) $$base; \
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ln -sf ext-toolchain-wrapper $$base; \
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;; \
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*gdb|*gdbtui) \
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if test "$(BR2_PACKAGE_HOST_GDB)" != "y"; then \
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@ -556,11 +533,18 @@ $(HOST_DIR)/usr/bin/ext-toolchain-wrapper: $(TOOLCHAIN_EXTERNAL_INSTALL)
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# We use --hash-style=both to increase the compatibility of
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# the generated binary with older platforms
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$(HOSTCC) $(HOST_CFLAGS) $(TOOLCHAIN_EXTERNAL_WRAPPER_ARGS) -s -Wl,--hash-style=both \
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toolchain/toolchain-external/ext-toolchain-wrapper.c -o $@
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toolchain/toolchain-external/ext-toolchain-wrapper.c \
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-o $(HOST_DIR)/usr/bin/ext-toolchain-wrapper
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endef
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toolchain-external: dependencies $(HOST_DIR)/usr/bin/ext-toolchain-wrapper
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# Even though we're installing things in both the staging, the host
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# and the target directory, we do everything within the
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# install-staging step, arbitrarily.
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define TOOLCHAIN_EXTERNAL_INSTALL_STAGING_CMDS
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$(TOOLCHAIN_EXTERNAL_INSTALL_CORE)
|
||||
$(TOOLCHAIN_EXTERNAL_INSTALL_BFIN_FDPIC)
|
||||
$(TOOLCHAIN_EXTERNAL_INSTALL_BFIN_FLAT)
|
||||
$(TOOLCHAIN_EXTERNAL_INSTALL_WRAPPER)
|
||||
endef
|
||||
|
||||
ifeq ($(BR2_TOOLCHAIN_EXTERNAL_DOWNLOAD),y)
|
||||
# download ext toolchain if so configured
|
||||
toolchain-external-source: $(addprefix $(DL_DIR)/,$(TOOLCHAIN_EXTERNAL_SOURCE))
|
||||
endif
|
||||
$(eval $(generic-package))
|
||||
Loading…
Reference in New Issue
Block a user