X-Git-Url: https://git.rohieb.name/openwrt.git/blobdiff_plain/93a1cc78a58b1d0c95b81343e5e72910201352dd..ae8a34c063cbc8e3f92728b54a5fa47ec92e6ebb:/toolchain/gcc/Makefile

diff --git a/toolchain/gcc/Makefile b/toolchain/gcc/Makefile
index f6f4acaab..325fe7474 100644
--- a/toolchain/gcc/Makefile
+++ b/toolchain/gcc/Makefile
@@ -1,8 +1,8 @@
-# Makefile for to build a gcc/uClibc toolchain
 #
 # Copyright (C) 2002-2003 Erik Andersen <andersen@uclibc.org>
 # Copyright (C) 2004 Manuel Novoa III <mjn3@uclibc.org>
-# Copyright (C) 2005 Felix Fietkau <openwrt@nbd.name>
+# Copyright (C) 2005-2006 Felix Fietkau <nbd@openwrt.org>
+# Copyright (C) 2006-2010 OpenWrt.org
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -20,192 +20,316 @@
 
 include $(TOPDIR)/rules.mk
 
-GCC_VERSION:=$(strip $(GCC_VERSION))
+PKG_NAME:=gcc
+GCC_VERSION:=$(call qstrip,$(CONFIG_GCC_VERSION))
+PKG_VERSION:=$(firstword $(subst +, ,$(GCC_VERSION)))
+GCC_DIR:=$(PKG_NAME)-$(PKG_VERSION)
 
-#GCC_SITE:=ftp://ftp.gnu.org/gnu/gcc/releases/gcc-$(GCC_VERSION)
-GCC_SITE:=ftp://ftp.fu-berlin.de/unix/languages/gcc/releases/gcc-$(GCC_VERSION) \
-	http://mirrors.rcn.net/pub/sourceware/gcc/releases/gcc-$(GCC_VERSION)
+ifdef CONFIG_GCC_VERSION_LLVM
+  PKG_SOURCE_VERSION:=c98c494b72ff875884c0c7286be67f16f9f6d7ab
+  PKG_REV:=83504
+  GCC_DIR:=llvm-gcc-4.2-r$(PKG_REV)
+  PKG_VERSION:=4.2.1
+  PKG_SOURCE:=$(GCC_DIR).tar.gz
+  PKG_SOURCE_PROTO:=git
+  PKG_SOURCE_URL:=git://repo.or.cz/llvm-gcc-4.2.git
+  PKG_SOURCE_SUBDIR:=$(GCC_DIR)
+  HOST_BUILD_DIR:=$(BUILD_DIR_TOOLCHAIN)/$(GCC_DIR)
+else
+  PKG_SOURCE_URL:=@GNU/gcc/gcc-$(PKG_VERSION)
+  PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.bz2
 
-GCC_SOURCE:=gcc-$(GCC_VERSION).tar.bz2
-GCC_DIR:=$(TOOL_BUILD_DIR)/gcc-$(GCC_VERSION)
-GCC_CAT:=bzcat
-GCC_STRIP_HOST_BINARIES:=true
+  ifeq ($(PKG_VERSION),3.4.6)
+    PKG_MD5SUM:=4a21ac777d4b5617283ce488b808da7b
+  endif
+  ifeq ($(PKG_VERSION),4.1.2)
+    PKG_MD5SUM:=a4a3eb15c96030906d8494959eeda23c
+  endif
+  ifeq ($(PKG_VERSION),4.2.4)
+    PKG_MD5SUM:=d79f553e7916ea21c556329eacfeaa16
+  endif
+  ifeq ($(PKG_VERSION),4.3.3)
+    PKG_MD5SUM:=cc3c5565fdb9ab87a05ddb106ba0bd1f
+  endif
+  ifeq ($(PKG_VERSION),4.4.0)
+    PKG_MD5SUM:=cf5d787bee57f38168b74d65a7c0e6fd
+  endif
+  ifeq ($(PKG_VERSION),4,4,1)
+    PKG_MD5SUM:=927eaac3d44b22f31f9c83df82f26436
+  endif
+  ifeq ($(PKG_VERSION),4.4.2)
+    PKG_MD5SUM:=70f5ac588a79e3c9901d5b34f58d896d
+  endif
+  ifeq ($(PKG_VERSION),4.4.3)
+    PKG_MD5SUM:=fe1ca818fc6d2caeffc9051fe67ff103
+  endif
+  ifeq ($(PKG_VERSION),4.5.0)
+  PKG_MD5SUM:=ff27b7c4a5d5060c8a8543a44abca31f
+  endif
+endif
 
-#############################################################
-#
-# Setup some initial stuff
-#
-#############################################################
+PATCH_DIR=./patches/$(GCC_VERSION)
 
-ifeq ($(BR2_INSTALL_LIBGCJ),y)
-TARGET_LANGUAGES:=c,c++,java
-else
-ifeq ($(BR2_INSTALL_LIBSTDCPP),y)
-TARGET_LANGUAGES:=c,c++
-else
-TARGET_LANGUAGES:=c
+include $(INCLUDE_DIR)/toolchain-build.mk
+
+HOST_STAMP_BUILT:=$(TOOLCHAIN_DIR)/stamp/.gcc-initial_installed
+
+HOST_BUILD_DIR0:=$(HOST_BUILD_DIR)-minimal
+HOST_BUILD_DIR1:=$(HOST_BUILD_DIR)-initial
+HOST_BUILD_DIR2:=$(HOST_BUILD_DIR)-final
+
+SEP:=,
+TARGET_LANGUAGES:="c$(if $(CONFIG_INSTALL_LIBSTDCPP),$(SEP)c++)$(if $(CONFIG_INSTALL_LIBGCJ),$(SEP)java)"
+
+export libgcc_cv_fixed_point=no
+
+GCC_CONFIGURE:= \
+	SHELL="$(BASH)" \
+	$(HOST_BUILD_DIR)/configure \
+		--prefix=$(TOOLCHAIN_DIR)/usr \
+		--build=$(GNU_HOST_NAME) \
+		--host=$(GNU_HOST_NAME) \
+		--target=$(REAL_GNU_TARGET_NAME) \
+		--with-gnu-ld \
+		--enable-target-optspace \
+		--disable-libgomp \
+		--disable-libmudflap \
+		--disable-multilib \
+		--disable-nls \
+		$(GRAPHITE_CONFIGURE) \
+		$(if $(CONFIG_GCC_USE_GRAPHITE),--with-host-libstdcxx=-lstdc++) \
+		$(SOFT_FLOAT_CONFIG_OPTION) \
+		$(call qstrip,$(CONFIG_EXTRA_GCC_CONFIG_OPTIONS)) \
+		$(if $(CONFIG_mips64)$(CONFIG_mips64el),--with-arch=mips64 --with-abi=64) \
+		$(if $(CONFIG_GCC_VERSION_LLVM),--enable-llvm=$(BUILD_DIR_BASE)/host/llvm) \
+		$(if $(CONFIG_GCC_VERSION_4_3_3_CS)$(CONFIG_GCC_VERSION_4_4_1_CS)$(CONFIG_GCC_VERSION_4_4_3_CS),--enable-poison-system-directories)
+
+ifneq ($(CONFIG_GCC_VERSION_4_3)$(CONFIG_GCC_VERSION_4_4)$(CONFIG_GCC_VERSION_4_5),)
+  GCC_BUILD_TARGET_LIBGCC:=y
+  GCC_CONFIGURE+= \
+		--with-gmp=$(TOPDIR)/staging_dir/host \
+		--with-mpfr=$(TOPDIR)/staging_dir/host \
+		--disable-decimal-float
 endif
+
+ifneq ($(CONFIG_GCC_VERSION_4_5),)
+  GCC_BUILD_TARGET_LIBGCC:=y
+  GCC_CONFIGURE+= \
+                --with-gmp=$(TOPDIR)/staging_dir/host \
+                --with-mpc=$(TOPDIR)/staging_dir/host \
+                --with-mpfr=$(TOPDIR)/staging_dir/host \
+                --disable-decimal-float
 endif
 
-#############################################################
-#
-# build the first pass gcc compiler
-#
-#############################################################
-
-GCC_BUILD_DIR1:=$(TOOL_BUILD_DIR)/gcc-$(GCC_VERSION)-initial
-
-$(DL_DIR)/$(GCC_SOURCE):
-	mkdir -p $(DL_DIR)
-	$(SCRIPT_DIR)/download.pl $(DL_DIR) $(GCC_SOURCE) x $(GCC_SITE)
-
-$(GCC_DIR)/.unpacked: $(DL_DIR)/$(GCC_SOURCE)
-	mkdir -p $(TOOL_BUILD_DIR)
-	$(GCC_CAT) $(DL_DIR)/$(GCC_SOURCE) | tar -C $(TOOL_BUILD_DIR) $(TAR_OPTIONS) -
-	touch $(GCC_DIR)/.unpacked
-
-$(GCC_DIR)/.patched: $(GCC_DIR)/.unpacked
-	# Apply any files named gcc-*.patch from the source directory to gcc
-	$(SCRIPT_DIR)/patch-kernel.sh $(GCC_DIR) ./$(GCC_VERSION) \*.patch
-	# Note: The soft float situation has improved considerably with gcc 3.4.x.
-	# We can dispense with the custom spec files, as well as libfloat for the arm case.
-	# However, we still need a patch for arm.  There's a similar patch for gcc 3.3.x
-	# which needs to be integrated so we can kill of libfloat for good.
-ifeq ($(BR2_SOFT_FLOAT),y)
-ifeq ("$(strip $(ARCH))","arm")
-	$(SCRIPT_DIR)/patch-kernel.sh $(GCC_DIR) ./$(GCC_VERSION) arm-softfloat.patch.conditional
+ifneq ($(CONFIG_SSP_SUPPORT),)
+  GCC_CONFIGURE+= \
+		--enable-libssp
+else
+  GCC_CONFIGURE+= \
+		--disable-libssp
 endif
-ifeq ("$(strip $(ARCH))","armeb")
-	$(SCRIPT_DIR)/patch-kernel.sh $(GCC_DIR) ./$(GCC_VERSION) arm-softfloat.patch.conditional
+
+ifneq ($(CONFIG_EXTRA_TARGET_ARCH),)
+  GCC_CONFIGURE+= \
+		--enable-biarch \
+		--enable-targets=$(call qstrip,$(CONFIG_EXTRA_TARGET_ARCH_NAME))-linux-$(TARGET_SUFFIX)
 endif
+
+ifeq ($(LIBC),uClibc)
+  GCC_CONFIGURE+= \
+		--disable-__cxa_atexit
+else
+  GCC_CONFIGURE+= \
+		--enable-__cxa_atexit
 endif
-	touch $(GCC_DIR)/.patched
 
-# The --without-headers option stopped working with gcc 3.0 and has never been
-# # fixed, so we need to actually have working C library header files prior to
-# # the step or libgcc will not build...
+GCC_CONFIGURE_STAGE0:= \
+	$(GCC_CONFIGURE) \
+		--with-newlib \
+		--without-headers \
+		--enable-languages=c \
+		--disable-libssp \
+		--disable-shared \
+		--disable-threads \
 
-$(GCC_BUILD_DIR1)/.configured: $(GCC_DIR)/.patched
-	mkdir -p $(GCC_BUILD_DIR1)
-	(cd $(GCC_BUILD_DIR1); rm -f config.cache; PATH=$(TARGET_PATH) \
-		$(GCC_DIR)/configure \
-		--prefix=$(STAGING_DIR) \
-		--build=$(GNU_HOST_NAME) \
-		--host=$(GNU_HOST_NAME) \
-		--target=$(REAL_GNU_TARGET_NAME) \
+GCC_CONFIGURE_STAGE1:= \
+	$(GCC_CONFIGURE) \
+		--with-newlib \
+		--with-sysroot=$(BUILD_DIR_TOOLCHAIN)/$(LIBC)-dev \
 		--enable-languages=c \
 		--disable-shared \
-		--with-sysroot=$(TOOL_BUILD_DIR)/uClibc_dev/ \
-		--disable-__cxa_atexit \
-		--enable-target-optspace \
-		--with-gnu-ld \
-		$(DISABLE_NLS) \
-		$(MULTILIB) \
-		$(SOFT_FLOAT_CONFIG_OPTION) \
-		$(GCC_WITH_CPU) $(GCC_WITH_ARCH) $(GCC_WITH_TUNE) \
-		$(EXTRA_GCC_CONFIG_OPTIONS));
-	touch $(GCC_BUILD_DIR1)/.configured
+		--disable-threads \
 
-$(GCC_BUILD_DIR1)/.compiled: $(GCC_BUILD_DIR1)/.configured
-	PATH=$(TARGET_PATH) $(MAKE) -C $(GCC_BUILD_DIR1) all-gcc
-	touch $(GCC_BUILD_DIR1)/.compiled
+GCC_CONFIGURE_STAGE2:= \
+	$(GCC_CONFIGURE) \
+		--enable-languages=$(TARGET_LANGUAGES) \
+		--enable-shared \
+		--enable-threads \
+		--with-slibdir=$(TOOLCHAIN_DIR)/lib
 
-$(STAGING_DIR)/bin/$(REAL_GNU_TARGET_NAME)-gcc: $(GCC_BUILD_DIR1)/.compiled
-	PATH=$(TARGET_PATH) $(MAKE) -C $(GCC_BUILD_DIR1) install-gcc
+ifneq ($(CONFIG_GCC_VERSION_4_5),)
+  GCC_CONFIGURE_STAGE2+= \
+		--enable-lto \
+		--with-libelf=$(TOPDIR)/staging_dir/host
+endif
 
-#############################################################
-#
-# second pass compiler build.  Build the compiler targeting 
-# the newly built shared uClibc library.
-#
-#############################################################
-#
-# Sigh... I had to rework things because using --with-gxx-include-dir
-# causes issues with include dir search order for g++.  This seems to
-# have something to do with "path translations" and possibly doesn't
-# affect gcc-target.  However, I haven't tested gcc-target yet so no
-# guarantees.  mjn3
-
-GCC_BUILD_DIR2:=$(TOOL_BUILD_DIR)/gcc-$(GCC_VERSION)-final
-$(GCC_BUILD_DIR2)/.configured: $(GCC_DIR)/.patched $(STAGING_DIR)/lib/libc.a
-	mkdir -p $(GCC_BUILD_DIR2)
+ifneq ($(CONFIG_TLS_SUPPORT),)
+  GCC_CONFIGURE_STAGE2+= \
+		--enable-tls
+else
+  GCC_CONFIGURE_STAGE2+= \
+		--disable-tls
+endif
+
+ifdef CONFIG_powerpc
+  TARGET_CFLAGS := $(patsubst -Os,-O2,$(TARGET_CFLAGS))
+endif
+
+GCC_MAKE:= \
+	export SHELL="$(BASH)"; \
+	$(MAKE) \
+		CFLAGS_FOR_TARGET="$(TARGET_CFLAGS)" \
+		CXXFLAGS_FOR_TARGET="$(TARGET_CFLAGS)"
+
+define Host/SetToolchainInfo
+	$(SED) 's,TARGET_CROSS=.*,TARGET_CROSS=$(REAL_GNU_TARGET_NAME)-,' $(TOOLCHAIN_DIR)/info.mk
+	$(SED) 's,GCC_VERSION=.*,GCC_VERSION=$(GCC_VERSION),' $(TOOLCHAIN_DIR)/info.mk
+endef
+
+
+define Stage0/Configure
+	mkdir -p $(HOST_BUILD_DIR0)
+	(cd $(HOST_BUILD_DIR0); rm -f config.cache; \
+		$(GCC_CONFIGURE_STAGE0) \
+	);
+endef
+
+define Stage0/Compile
+	$(GCC_MAKE) -C $(HOST_BUILD_DIR0) all-gcc
+endef
+
+define Stage0/Install
+	$(GCC_MAKE) -C $(HOST_BUILD_DIR0) install-gcc
+endef
+
+
+define Stage1/Configure
+	mkdir -p $(HOST_BUILD_DIR1)
+	(cd $(HOST_BUILD_DIR1); rm -f config.cache; \
+		$(GCC_CONFIGURE_STAGE1) \
+	);
+endef
+
+define Stage1/Compile
+	$(CP) $(BUILD_DIR_TOOLCHAIN)/linux-dev/* $(BUILD_DIR_TOOLCHAIN)/$(LIBC)-dev/
+	$(GCC_MAKE) -C $(HOST_BUILD_DIR1) \
+		all-build-libiberty \
+		all-gcc \
+		$(if $(GCC_BUILD_TARGET_LIBGCC),all-target-libgcc)
+endef
+
+define Stage1/Install
+	$(GCC_MAKE) -C $(HOST_BUILD_DIR1) \
+		install-gcc \
+		$(if $(GCC_BUILD_TARGET_LIBGCC),install-target-libgcc)
+
+	# XXX: glibc insists on linking against libgcc_eh
+	( cd $(TOOLCHAIN_DIR)/usr/lib/gcc/$(REAL_GNU_TARGET_NAME)/$(PKG_VERSION) ; \
+		[ -e libgcc_eh.a ] || ln -sf libgcc.a libgcc_eh.a ; \
+		cp libgcc.a libgcc_initial.a; \
+	)
+endef
+
+
+define Stage2/Configure
+	mkdir -p $(HOST_BUILD_DIR2) $(TOOLCHAIN_DIR)/usr/$(REAL_GNU_TARGET_NAME)
 	# Important!  Required for limits.h to be fixed.
-	rm -rf $(STAGING_DIR)/$(REAL_GNU_TARGET_NAME)/sys-include
-	ln -sf ../include $(STAGING_DIR)/$(REAL_GNU_TARGET_NAME)/sys-include
-	rm -rf $(STAGING_DIR)/$(REAL_GNU_TARGET_NAME)/lib
-	ln -sf ../lib $(STAGING_DIR)/$(REAL_GNU_TARGET_NAME)/lib
-	(cd $(GCC_BUILD_DIR2); rm -f config.cache; PATH=$(TARGET_PATH) \
-		$(GCC_DIR)/configure \
-		--prefix=$(STAGING_DIR) \
-		--build=$(GNU_HOST_NAME) \
-		--host=$(GNU_HOST_NAME) \
-		--target=$(REAL_GNU_TARGET_NAME) \
-		--enable-languages=$(TARGET_LANGUAGES) \
-		--enable-shared \
-		--disable-__cxa_atexit \
-		--enable-target-optspace \
-		--with-gnu-ld \
-		$(DISABLE_NLS) \
-		$(MULTILIB) \
-		$(SOFT_FLOAT_CONFIG_OPTION) \
-		$(GCC_WITH_CPU) $(GCC_WITH_ARCH) $(GCC_WITH_TUNE) \
-		$(GCC_USE_SJLJ_EXCEPTIONS) \
-		$(EXTRA_GCC_CONFIG_OPTIONS));
-	touch $(GCC_BUILD_DIR2)/.configured
-
-$(GCC_BUILD_DIR2)/.compiled: $(GCC_BUILD_DIR2)/.configured
-	PATH=$(TARGET_PATH) $(MAKE) -C $(GCC_BUILD_DIR2) all
-	touch $(GCC_BUILD_DIR2)/.compiled
-
-gcc-install: $(GCC_BUILD_DIR2)/.compiled
-	PATH=$(TARGET_PATH) $(MAKE) -C $(GCC_BUILD_DIR2) install
-	echo $(GCC_VERSION) > $(STAGING_DIR)/gcc_version
+	rm -rf $(TOOLCHAIN_DIR)/usr/$(REAL_GNU_TARGET_NAME)/sys-include
+	ln -sf ../include $(TOOLCHAIN_DIR)/usr/$(REAL_GNU_TARGET_NAME)/sys-include
+	rm -rf $(TOOLCHAIN_DIR)/usr/$(REAL_GNU_TARGET_NAME)/lib
+	ln -sf ../lib $(TOOLCHAIN_DIR)/usr/$(REAL_GNU_TARGET_NAME)/lib
+	$(if $(CONFIG_mips64)$(CONFIG_mips64el)$(CONFIG_x86_64),ln -sf ../lib64 $(TOOLCHAIN_DIR)/usr/$(REAL_GNU_TARGET_NAME)/lib64)
+	(cd $(HOST_BUILD_DIR2); rm -f config.cache; \
+		$(GCC_CONFIGURE_STAGE2) \
+	);
+endef
+
+define Stage2/Compile
+	$(GCC_MAKE) -C $(HOST_BUILD_DIR2) all
+endef
+
+define SetupExtraArch
+	for app in $(TOOLCHAIN_DIR)/usr/bin/$(OPTIMIZE_FOR_CPU)*-{gcc,gcc-*,g++}; do \
+		[ -e $$$$app ] || continue; \
+		old_base=$$$$(basename $$$$app); \
+		new_base=$(call qstrip,$(CONFIG_EXTRA_TARGET_ARCH_NAME))-$$$${old_base##$(OPTIMIZE_FOR_CPU)-}; \
+		sed -e "s/@CC_BASE@/$$$$old_base/" \
+			-e 's/@EXTRA_ARCH_OPTS@/$(call qstrip,$(CONFIG_EXTRA_TARGET_ARCH_OPTS))/' \
+			 ./files/alternate-arch-cc.in > \
+			 $(TOOLCHAIN_DIR)/usr/bin/$$$$new_base; \
+		chmod a+x $(TOOLCHAIN_DIR)/usr/bin/$$$$new_base; \
+	done
+endef
+
+define Stage2/Install
+	$(_SINGLE)$(GCC_MAKE) -C $(HOST_BUILD_DIR2) install
 	# Set up the symlinks to enable lying about target name.
 	set -e; \
-	(cd $(STAGING_DIR); \
+	(cd $(TOOLCHAIN_DIR)/usr; \
 		ln -sf $(REAL_GNU_TARGET_NAME) $(GNU_TARGET_NAME); \
 		cd bin; \
 		for app in $(REAL_GNU_TARGET_NAME)-* ; do \
-			ln -sf $${app} \
-		   	$(GNU_TARGET_NAME)$${app##$(REAL_GNU_TARGET_NAME)}; \
+			ln -sf $$$${app} \
+		   	$(GNU_TARGET_NAME)$$$${app##$(REAL_GNU_TARGET_NAME)}; \
 		done; \
 	);
-	#
-	# Now for the ugly 3.3.x soft float hack...
-	#
-ifeq ($(BR2_SOFT_FLOAT),y)
-ifeq ($(findstring 3.3.,$(GCC_VERSION)),3.3.)
-	# Make sure we have a soft float specs file for this arch
-	if [ ! -f ./$(GCC_VERSION)/specs-$(ARCH)-soft-float ] ; then \
-		echo soft float configured but no specs file for this arch ; \
-		/bin/false ; \
-	fi;
-	# Replace specs file with one that defaults to soft float mode.
-	if [ ! -f $(STAGING_DIR)/lib/gcc-lib/$(REAL_GNU_TARGET_NAME)/$(GCC_VERSION)/specs ] ; then \
-		echo staging dir specs file is missing ; \
-		/bin/false ; \
-	fi;
-	cp ./$(GCC_VERSION)/specs-$(ARCH)-soft-float $(STAGING_DIR)/lib/gcc-lib/$(REAL_GNU_TARGET_NAME)/$(GCC_VERSION)/specs
-endif
-endif
-# We do another ugly hack here because the standard behaviour is
-# to include a reference to libgcc.so.1 in all binaries. For flash space
-# saving, we change the specs file to link in a static libgcc here. 
-	if [ ! -f $(STAGING_DIR)/lib/gcc/$(REAL_GNU_TARGET_NAME)/$(GCC_VERSION)/specs ] ; then \
-		echo staging dir specs file is missing ; \
-		/bin/false ; \
-	fi;
-	if grep -q as-needed $(STAGING_DIR)/lib/gcc/$(REAL_GNU_TARGET_NAME)/$(GCC_VERSION)/specs; then \
-		patch -d $(STAGING_DIR)/lib/gcc/$(REAL_GNU_TARGET_NAME)/$(GCC_VERSION)/ -p0 < ./$(GCC_VERSION)/static-libgcc.patch.conditional ; \
-	fi;
-
-source: $(DL_DIR)/$(GCC_SOURCE)
-prepare: $(STAGING_DIR)/bin/$(REAL_GNU_TARGET_NAME)-gcc
-compile: gcc-install
-install:
-clean: gcc-clean
-	rm -rf $(GCC_DIR)
-	rm -rf $(GCC_BUILD_DIR1)
-	rm -rf $(GCC_BUILD_DIR2)
-	rm -f $(STAGING_DIR)/bin/$(REAL_GNU_TARGET_NAME)-gc*
-	rm -f $(STAGING_DIR)/bin/$(REAL_GNU_TARGET_NAME)-c*
+	$(if $(CONFIG_EXTRA_TARGET_ARCH),$(call SetupExtraArch))
+endef
+
+
+BUGURL=https://dev.openwrt.org/
+
+define Host/Prepare
+	$(call Host/SetToolchainInfo)
+	$(call Host/Prepare/Default)
+	ln -snf $(GCC_DIR) $(BUILD_DIR_TOOLCHAIN)/$(PKG_NAME)
+	$(CP) $(SCRIPT_DIR)/config.{guess,sub} $(HOST_BUILD_DIR)/
+	$(SED) 's,^MULTILIB_OSDIRNAMES,# MULTILIB_OSDIRNAMES,' $(HOST_BUILD_DIR)/gcc/config/*/t-*
+	$(SED) 's,\(version_string.. = "[0-9\.]*\).*\(";\),\1 (OpenWrt-2.0)\2,' $(HOST_BUILD_DIR)/gcc/version.c
+	$(SED) 's,\(bug_report_url.. = "\).*\(";\),\1<URL:$(BUGURL)>\2,' $(HOST_BUILD_DIR)/gcc/version.c
+	$(SED) 's,http://gcc.gnu.org/bugs.html,$(BUGURL),' $(HOST_BUILD_DIR)/gcc/configure
+	#(cd $(HOST_BUILD_DIR)/libstdc++-v3; autoconf;);
+	$(SED) 's,gcc_no_link=yes,gcc_no_link=no,' $(HOST_BUILD_DIR)/libstdc++-v3/configure
+	$(call Stage0/Configure)
+	$(call Stage0/Compile)
+	$(call Stage0/Install)
+endef
+
+define Host/Configure
+endef
+
+define Host/Compile
+	$(call Stage1/Configure)
+	$(call Stage1/Compile)
+	$(call Stage1/Install)
+endef
+
+define Host/Install
+	$(call Stage2/Configure)
+	$(call Stage2/Compile)
+	$(call Stage2/Install)
+endef
+
+define Host/Clean
+	rm -rf \
+		$(HOST_BUILD_DIR) \
+		$(HOST_BUILD_DIR0) \
+		$(HOST_BUILD_DIR1) \
+		$(HOST_BUILD_DIR2) \
+		$(BUILD_DIR_TOOLCHAIN)/$(PKG_NAME) \
+		$(TOOLCHAIN_DIR)/usr/$(REAL_GNU_TARGET_NAME) \
+		$(TOOLCHAIN_DIR)/usr/bin/$(REAL_GNU_TARGET_NAME)-gc* \
+		$(TOOLCHAIN_DIR)/usr/bin/$(REAL_GNU_TARGET_NAME)-c*
+endef
+
+$(eval $(call HostBuild))