gcc: split up the build process into three distinct stages (minimal, initial, final), to clean up the dependency handling nastiness and to improve support for rebuilding parts of the toolchain

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@22319 3c298f89-4303-0410-b956-a3cf2f4a3e73

6 files changed, 347 insertions, 349 deletions

diff --git a/toolchain/Makefile b/toolchain/Makefile
index fa417879a7..3d8ba4c4ba 100644
--- a/toolchain/Makefile
+++ b/toolchain/Makefile
@@ -28,19 +28,19 @@
 curdir:=toolchain
 
 # subdirectories to descend into
-$(curdir)/builddirs := $(if $(CONFIG_GDB),gdb) $(if $(CONFIG_INSIGHT),insight) $(if $(CONFIG_EXTERNAL_TOOLCHAIN),,kernel-headers binutils gcc $(LIBC) $(if $(CONFIG_GLIBC_PORTS),glibc-ports))
+$(curdir)/builddirs := $(if $(CONFIG_GDB),gdb) $(if $(CONFIG_INSIGHT),insight) $(if $(CONFIG_EXTERNAL_TOOLCHAIN),,kernel-headers binutils gcc/minimal gcc/initial gcc/final $(LIBC) $(if $(CONFIG_GLIBC_PORTS),glibc-ports))
 $(curdir)/builddirs-compile:=$($(curdir)/builddirs-prepare)
 $(curdir)/builddirs-install:=$($(curdir)/builddirs-compile)
 
 # builddir dependencies
 ifeq ($(CONFIG_EXTERNAL_TOOLCHAIN),)
   $(curdir)/$(LIBC)/prepare:=$(curdir)/kernel-headers/install
-  $(curdir)/gcc/prepare:=$(curdir)/binutils/install
-  $(curdir)/kernel-headers/install:=$(curdir)/gcc/prepare
-  $(curdir)/gcc/compile:=$(curdir)/$(LIBC)/prepare
-  $(curdir)/$(LIBC)/compile:=$(curdir)/gcc/compile
-  $(curdir)/gcc/install:=$(curdir)/$(LIBC)/compile
-  $(curdir)/$(LIBC)/install:=$(curdir)/gcc/install
+  $(curdir)/gcc/minimal/compile:=$(curdir)/binutils/install
+  $(curdir)/kernel-headers/install:=$(curdir)/gcc/minimal/install
+  $(curdir)/gcc/initial/compile:=$(curdir)/$(LIBC)/prepare
+  $(curdir)/$(LIBC)/compile:=$(curdir)/gcc/initial/install
+  $(curdir)/gcc/final/compile:=$(curdir)/$(LIBC)/compile
+  $(curdir)/$(LIBC)/install:=$(curdir)/gcc/final/install
   ifneq ($(CONFIG_GLIBC_PORTS),)
     $(curdir)/glibc/prepare:=$(curdir)/glibc-ports/prepare
   endif
@@ -48,7 +48,7 @@ endif
 
 ifdef CONFIG_GCC_VERSION_LLVM
   $(curdir)/builddirs += llvm
-  $(curdir)/gcc/prepare += $(curdir)/llvm/install
+  $(curdir)/gcc/minimal/compile += $(curdir)/llvm/install
 endif
 
 ifneq ($(ARCH),)
diff --git a/toolchain/gcc/Makefile b/toolchain/gcc/Makefile
deleted file mode 100644
index fc31d6fe5f..0000000000
--- a/toolchain/gcc/Makefile
+++ /dev/null
@@ -1,341 +0,0 @@
-#
-# Copyright (C) 2002-2003 Erik Andersen <andersen@uclibc.org>
-# Copyright (C) 2004 Manuel Novoa III <mjn3@uclibc.org>
-# 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
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-# General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
-# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-
-include $(TOPDIR)/rules.mk
-
-PKG_NAME:=gcc
-GCC_VERSION:=$(call qstrip,$(CONFIG_GCC_VERSION))
-PKG_VERSION:=$(firstword $(subst +, ,$(GCC_VERSION)))
-GCC_DIR:=$(PKG_NAME)-$(PKG_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
-
-  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 ($(PKG_VERSION),4.3.4)
-    PKG_MD5SUM:=60df63222dbffd53ca11492a2545044f
-  endif
-  ifeq ($(PKG_VERSION),4.3.5)
-    PKG_MD5SUM:=e588cfde3bf323f82918589b94f14a15
-  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),4.4.4)
-    PKG_MD5SUM:=7ff5ce9e5f0b088ab48720bbd7203530
-  endif
-  ifeq ($(PKG_VERSION),4.5.0)
-  PKG_MD5SUM:=ff27b7c4a5d5060c8a8543a44abca31f
-  endif
-endif
-
-PATCH_DIR=./patches/$(GCC_VERSION)
-
-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
-
-ifneq ($(CONFIG_SSP_SUPPORT),)
-  GCC_CONFIGURE+= \
-		--enable-libssp
-else
-  GCC_CONFIGURE+= \
-		--disable-libssp
-endif
-
-ifneq ($(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
-
-GCC_CONFIGURE_STAGE0:= \
-	$(GCC_CONFIGURE) \
-		--with-newlib \
-		--without-headers \
-		--enable-languages=c \
-		--disable-libssp \
-		--disable-shared \
-		--disable-threads \
-
-GCC_CONFIGURE_STAGE1:= \
-	$(GCC_CONFIGURE) \
-		--with-newlib \
-		--with-sysroot=$(BUILD_DIR_TOOLCHAIN)/$(LIBC)-dev \
-		--enable-languages=c \
-		--disable-shared \
-		--disable-threads \
-
-GCC_CONFIGURE_STAGE2:= \
-	$(GCC_CONFIGURE) \
-		--enable-languages=$(TARGET_LANGUAGES) \
-		--enable-shared \
-		--enable-threads \
-		--with-slibdir=$(TOOLCHAIN_DIR)/lib
-
-ifneq ($(CONFIG_GCC_VERSION_4_5),)
-  GCC_CONFIGURE_STAGE2+= \
-		--enable-lto \
-		--with-libelf=$(TOPDIR)/staging_dir/host
-endif
-
-ifneq ($(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 $(TOOLCHAIN_DIR)/usr/$(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 $$$$app ] || continue; \
-		old_base=$$$$(basename $$$$app); \
-		new_base=$(call qstrip,$(CONFIG_EXTRA_TARGET_ARCH_NAME))-$$$${old_base##$(OPTIMIZE_FOR_CPU)-}; \
-		sed -e "s/@CC_BASE@/$$$$old_base/" \
-			-e 's/@EXTRA_ARCH_OPTS@/$(call qstrip,$(CONFIG_EXTRA_TARGET_ARCH_OPTS))/' \
-			 ./files/alternate-arch-cc.in > \
-			 $(TOOLCHAIN_DIR)/usr/bin/$$$$new_base; \
-		chmod a+x $(TOOLCHAIN_DIR)/usr/bin/$$$$new_base; \
-	done
-endef
-
-define Stage2/Install
-	$(_SINGLE)$(GCC_MAKE) -C $(HOST_BUILD_DIR2) install
-	# Set up the symlinks to enable lying about target name.
-	set -e; \
-	(cd $(TOOLCHAIN_DIR)/usr; \
-		ln -sf $(REAL_GNU_TARGET_NAME) $(GNU_TARGET_NAME); \
-		cd bin; \
-		for app in $(REAL_GNU_TARGET_NAME)-* ; do \
-			ln -sf $$$${app} \
-		   	$(GNU_TARGET_NAME)$$$${app##$(REAL_GNU_TARGET_NAME)}; \
-		done; \
-	);
-	$(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))
diff --git a/toolchain/gcc/common.mk b/toolchain/gcc/common.mk
new file mode 100644
index 0000000000..5420727162
--- /dev/null
+++ b/toolchain/gcc/common.mk
@@ -0,0 +1,190 @@
+#
+# Copyright (C) 2002-2003 Erik Andersen <andersen@uclibc.org>
+# Copyright (C) 2004 Manuel Novoa III <mjn3@uclibc.org>
+# 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
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=gcc
+GCC_VERSION:=$(call qstrip,$(CONFIG_GCC_VERSION))
+PKG_VERSION:=$(firstword $(subst +, ,$(GCC_VERSION)))
+GCC_DIR:=$(PKG_NAME)-$(PKG_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
+
+  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 ($(PKG_VERSION),4.3.4)
+    PKG_MD5SUM:=60df63222dbffd53ca11492a2545044f
+  endif
+  ifeq ($(PKG_VERSION),4.3.5)
+    PKG_MD5SUM:=e588cfde3bf323f82918589b94f14a15
+  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),4.4.4)
+    PKG_MD5SUM:=7ff5ce9e5f0b088ab48720bbd7203530
+  endif
+  ifeq ($(PKG_VERSION),4.5.0)
+  PKG_MD5SUM:=ff27b7c4a5d5060c8a8543a44abca31f
+  endif
+endif
+
+PATCH_DIR=../patches/$(GCC_VERSION)
+
+BUGURL=https://dev.openwrt.org/
+
+include $(INCLUDE_DIR)/toolchain-build.mk
+
+HOST_SOURCE_DIR:=$(HOST_BUILD_DIR)
+ifeq ($(GCC_VARIANT),minimal)
+  GCC_BUILD_DIR:=$(HOST_BUILD_DIR)-$(GCC_VARIANT)
+else
+  HOST_BUILD_DIR:=$(HOST_BUILD_DIR)-$(GCC_VARIANT)
+  GCC_BUILD_DIR:=$(HOST_BUILD_DIR)
+endif
+
+HOST_STAMP_PREPARED:=$(HOST_BUILD_DIR)/.prepared
+HOST_STAMP_BUILT:=$(GCC_BUILD_DIR)/.built
+HOST_STAMP_CONFIGURED:=$(GCC_BUILD_DIR)/.configured
+HOST_STAMP_INSTALLED:=$(STAGING_DIR_HOST)/stamp/.gcc_$(GCC_VARIANT)_installed
+
+SEP:=,
+TARGET_LANGUAGES:="c$(if $(CONFIG_INSTALL_LIBSTDCPP),$(SEP)c++)$(if $(CONFIG_INSTALL_LIBGCJ),$(SEP)java)"
+
+export libgcc_cv_fixed_point=no
+
+GCC_CONFIGURE:= \
+	SHELL="$(BASH)" \
+	$(HOST_SOURCE_DIR)/configure \
+		--prefix=$(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
+
+ifneq ($(CONFIG_SSP_SUPPORT),)
+  GCC_CONFIGURE+= \
+		--enable-libssp
+else
+  GCC_CONFIGURE+= \
+		--disable-libssp
+endif
+
+ifneq ($(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
+
+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/Prepare
+	mkdir -p $(GCC_BUILD_DIR)
+endef
+
+define Host/Configure
+	(cd $(GCC_BUILD_DIR) && rm -f config.cache; \
+		$(GCC_CONFIGURE) \
+	);
+endef
+
+define Host/Clean
+	rm -rf \
+		$(STAGING_DIR_HOST)/stamp/.gcc_* \
+		$(STAGING_DIR_HOST)/stamp/.binutils_* \
+		$(GCC_BUILD_DIR) \
+		$(BUILD_DIR_TOOLCHAIN)/$(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
diff --git a/toolchain/gcc/final/Makefile b/toolchain/gcc/final/Makefile
new file mode 100644
index 0000000000..bdba277b44
--- /dev/null
+++ b/toolchain/gcc/final/Makefile
@@ -0,0 +1,71 @@
+GCC_VARIANT:=final
+
+include ../common.mk
+
+GCC_CONFIGURE += \
+	--enable-languages=$(TARGET_LANGUAGES) \
+	--enable-shared \
+	--enable-threads \
+	--with-slibdir=$(TOOLCHAIN_DIR)/lib
+
+ifneq ($(CONFIG_GCC_VERSION_4_5),)
+  GCC_CONFIGURE += \
+	--enable-lto \
+	--with-libelf=$(TOPDIR)/staging_dir/host
+endif
+
+ifneq ($(CONFIG_TLS_SUPPORT),)
+  GCC_CONFIGURE += \
+	--enable-tls
+else
+  GCC_CONFIGURE += \
+	--disable-tls
+endif
+
+define Host/Configure
+	mkdir -p $(GCC_BUILD_DIR) $(TOOLCHAIN_DIR)/usr/$(REAL_GNU_TARGET_NAME)
+	# Important!  Required for limits.h to be fixed.
+	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 $(GCC_BUILD_DIR) && rm -f config.cache; \
+		$(GCC_CONFIGURE) \
+	);
+endef
+
+define Host/Compile
+	$(GCC_MAKE) -C $(GCC_BUILD_DIR) all
+endef
+
+define SetupExtraArch
+	for app in $(TOOLCHAIN_DIR)/usr/bin/$(OPTIMIZE_FOR_CPU)*-{gcc,gcc-*,g++}; do \
+		[ -e $$$$app ] || continue; \
+		old_base=$$$$(basename $$$$app); \
+		new_base=$(call qstrip,$(CONFIG_EXTRA_TARGET_ARCH_NAME))-$$$${old_base##$(OPTIMIZE_FOR_CPU)-}; \
+		sed -e "s/@CC_BASE@/$$$$old_base/" \
+			-e 's/@EXTRA_ARCH_OPTS@/$(call qstrip,$(CONFIG_EXTRA_TARGET_ARCH_OPTS))/' \
+			 ../files/alternate-arch-cc.in > \
+			 $(TOOLCHAIN_DIR)/usr/bin/$$$$new_base; \
+		chmod a+x $(TOOLCHAIN_DIR)/usr/bin/$$$$new_base; \
+	done
+endef
+
+define Host/Install
+	$(_SINGLE)$(GCC_MAKE) -C $(GCC_BUILD_DIR) install
+	# Set up the symlinks to enable lying about target name.
+	set -e; \
+	(cd $(TOOLCHAIN_DIR)/usr; \
+		ln -sf $(REAL_GNU_TARGET_NAME) $(GNU_TARGET_NAME); \
+		cd bin; \
+		for app in $(REAL_GNU_TARGET_NAME)-* ; do \
+			ln -sf $$$${app} \
+		   	$(GNU_TARGET_NAME)$$$${app##$(REAL_GNU_TARGET_NAME)}; \
+		done; \
+	);
+	$(if $(CONFIG_EXTRA_TARGET_ARCH),$(call SetupExtraArch))
+endef
+
+$(eval $(call HostBuild))
+
diff --git a/toolchain/gcc/initial/Makefile b/toolchain/gcc/initial/Makefile
new file mode 100644
index 0000000000..8cc6b3be14
--- /dev/null
+++ b/toolchain/gcc/initial/Makefile
@@ -0,0 +1,32 @@
+GCC_VARIANT:=initial
+
+include ../common.mk
+
+GCC_CONFIGURE += \
+	--with-newlib \
+	--with-sysroot=$(BUILD_DIR_TOOLCHAIN)/$(LIBC)-dev \
+	--enable-languages=c \
+	--disable-shared \
+	--disable-threads \
+
+define Host/Compile
+	$(CP) $(BUILD_DIR_TOOLCHAIN)/linux-dev/* $(BUILD_DIR_TOOLCHAIN)/$(LIBC)-dev/
+	$(GCC_MAKE) -C $(GCC_BUILD_DIR) \
+		all-build-libiberty \
+		all-gcc \
+		$(if $(GCC_BUILD_TARGET_LIBGCC),all-target-libgcc)
+endef
+
+define Host/Install
+	$(GCC_MAKE) -C $(GCC_BUILD_DIR) \
+		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)/$(PKG_VERSION) ; \
+		[ -e libgcc_eh.a ] || ln -sf libgcc.a libgcc_eh.a ; \
+		cp libgcc.a libgcc_initial.a; \
+	)
+endef
+
+$(eval $(call HostBuild))
diff --git a/toolchain/gcc/minimal/Makefile b/toolchain/gcc/minimal/Makefile
new file mode 100644
index 0000000000..9b978dedac
--- /dev/null
+++ b/toolchain/gcc/minimal/Makefile
@@ -0,0 +1,46 @@
+GCC_VARIANT:=minimal
+
+include ../common.mk
+
+GCC_CONFIGURE += \
+	--with-newlib \
+	--without-headers \
+	--enable-languages=c \
+	--disable-libssp \
+	--disable-shared \
+	--disable-threads
+
+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 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
+	mkdir -p $(GCC_BUILD_DIR)
+endef
+
+define Host/Compile
+	$(GCC_MAKE) -C $(GCC_BUILD_DIR) all-gcc
+endef
+
+define Host/Install
+	$(GCC_MAKE) -C $(GCC_BUILD_DIR) install-gcc
+endef
+
+define Host/Clean
+	rm -rf \
+		$(HOST_BUILD_DIR) \
+		$(GCC_BUILD_DIR)
+endef
+
+$(eval $(call HostBuild))