diff -Nur gcc-4.8.2.orig/gcc/configure gcc-4.8.2/gcc/configure
--- gcc-4.8.2.orig/gcc/configure	2013-06-19 03:18:38.000000000 +0200
+++ gcc-4.8.2/gcc/configure	2014-03-03 15:05:00.647062804 +0100
@@ -11204,7 +11204,7 @@
 	esac
 	saved_CFLAGS="${CFLAGS}"
 	CC="${CC_FOR_BUILD}" CFLAGS="${CFLAGS_FOR_BUILD}" \
-	LDFLAGS="${LDFLAGS_FOR_BUILD}" \
+	LDFLAGS="${LDFLAGS_FOR_BUILD}" CPPFLAGS="${CPPFLAGS_FOR_BUILD}" \
 	${realsrcdir}/configure \
 		--enable-languages=${enable_languages-all} \
 		--target=$target_alias --host=$build_alias --build=$build_alias
diff -Nur gcc-4.8.2.orig/gcc/Makefile.in gcc-4.8.2/gcc/Makefile.in
--- gcc-4.8.2.orig/gcc/Makefile.in	2013-07-08 11:14:34.000000000 +0200
+++ gcc-4.8.2/gcc/Makefile.in	2014-03-03 15:13:22.021327933 +0100
@@ -996,7 +996,7 @@
 # Likewise.  Put INCLUDES at the beginning: this way, if some autoconf macro
 # puts -I options in CPPFLAGS, our include files in the srcdir will always
 # win against random include files in /usr/include.
-ALL_CPPFLAGS = $(INCLUDES) $(CPPFLAGS)
+ALL_CPPFLAGS = $(INCLUDES)
 
 # This is the variable to use when using $(COMPILER).
 ALL_COMPILERFLAGS = $(ALL_CXXFLAGS)