--- gcc/configure	2013-12-05 08:11:17.000000000 +0100
+++ gcc/configure	2013-12-11 09:36:03.628779968 +0100
@@ -11288,7 +11288,8 @@ else
 	*) realsrcdir=../${srcdir};;
 	esac
 	CC="${CC_FOR_BUILD}" CFLAGS="${CFLAGS_FOR_BUILD}" \
-	LDFLAGS="${LDFLAGS_FOR_BUILD}" GMPINC="" \
+	CXX="${CXX_FOR_BUILD}" CXXFLAGS="${CXXFLAGS_FOR_BUILD}" \
+	LDFLAGS="${LDFLAGS_FOR_BUILD}" \
 	${realsrcdir}/configure \
 		--enable-languages=${enable_languages-all} \
 		--target=$target_alias --host=$build_alias --build=$build_alias
--- gcc/configure.ac	2013-12-05 08:11:17.000000000 +0100
+++ gcc/configure.ac	2013-12-11 08:59:36.064751311 +0100
@@ -1530,7 +1530,8 @@ else
 	*) realsrcdir=../${srcdir};;
 	esac
 	CC="${CC_FOR_BUILD}" CFLAGS="${CFLAGS_FOR_BUILD}" \
-	LDFLAGS="${LDFLAGS_FOR_BUILD}" GMPINC="" \
+	CXX="${CXX_FOR_BUILD}" CXXFLAGS="${CXXFLAGS_FOR_BUILD}" \
+	LDFLAGS="${LDFLAGS_FOR_BUILD}" \
 	${realsrcdir}/configure \
 		--enable-languages=${enable_languages-all} \
 		--target=$target_alias --host=$build_alias --build=$build_alias