--- toolchain.eclass.orig	2012-10-23 00:12:36.998615518 +0200
+++ toolchain.eclass	2012-10-23 00:12:17.467319578 +0200
@@ -23,7 +23,7 @@
 	inherit git-2
 fi
 
-EXPORT_FUNCTIONS pkg_setup src_unpack src_compile src_test src_install pkg_postinst pkg_postrm
+EXPORT_FUNCTIONS pkg_setup src_unpack src_compile src_test src_install pkg_preinst pkg_postinst pkg_prerm pkg_postrm
 DESCRIPTION="The GNU Compiler Collection"
 
 FEATURES=${FEATURES/multilib-strict/}
@@ -570,10 +570,29 @@
 	unset LANGUAGES #265283
 }
 
+toolchain_pkg_preinst() {
+	if ! is_crosscompile ; then
+		# Temporarily add the the new path directly to the linker search paths
+		# to be sure the new libgcc_s.so will be found after the old one got removed.
+		# This has to be done because pkg_postinst (and thus gcc_config) is called
+		# only after the old (current) libgcc_s.so was removed, which would leave
+		# the system without any libgcc_s.so which is necessary for gcc_config.
+		# See bug #437050
+		echo "${PREFIX}/lib/gcc/${CTARGET}/${GCC_CONFIG_VER}" > "/etc/ld.so.conf.d/00_toolchain_eclass_tmp_${PF}.conf"
+	fi
+}
+
 toolchain_pkg_postinst() {
 	do_gcc_config
 
 	if ! is_crosscompile ; then
+		# gcc_config was called so the new libgcc_s.so can be found without the temporary.
+		# See bug #437050
+		rm "/etc/ld.so.conf.d/00_toolchain_eclass_tmp_${PF}.conf" # remove temporary file
+		ldconfig # update the dynamic linker search paths
+	fi
+
+	if ! is_crosscompile ; then
 		echo
 		ewarn "If you have issues with packages unable to locate libstdc++.la,"
 		ewarn "then try running 'fix_libtool_files.sh' on the old gcc versions."
@@ -601,6 +620,12 @@
 	fi
 }
 
+toolchain_pkg_prerm() {
+	if ! is_crosscompile ; then
+		ldconfig # update the dynamic linker search paths
+	fi
+}
+
 toolchain_pkg_postrm() {
 	# to make our lives easier (and saner), we do the fix_libtool stuff here.
 	# rather than checking SLOT's and trying in upgrade paths, we just see if