glibc: remove hard-coded reference to gcc -E

(From OE-Core rev: 2c0a72d4e7eafee225e702f4c91cd206bc05ec55)

Signed-off-by: Jérémy Rosen <jeremy.rosen@smile.fr>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/glibc/glibc/0001-locale-fix-hard-coded-reference-to-gcc-E.patch

@@ -0,0 +1,39 @@
+From 2c0ab83eb54c0e0fccbf261726dc03803b236079 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?J=C3=A9r=C3=A9my=20Rosen?= <jeremy.rosen@smile.fr>
+Date: Mon, 22 Aug 2016 16:09:25 +0200
+Subject: [PATCH] locale: fix hard-coded reference to gcc -E
+
+When new version of compilers are published, they may not be compatible with 
+older versions of software. This is particularly common when software is built
+with -Werror.
+
+Autotools provides a way for a user to specify the name of his compiler using a
+set of variables ($CC $CXX $CPP etc.). Those variables are used correctly when
+compiling glibc but the script used to generate transliterations in the locale/
+subdirectory directly calls the gcc binary to get the output of the 
+preprocessor instead of using the $CPP variable provided by the build 
+environment. 
+
+This patch replaces the hard-coded reference to the gcc binary with the proper
+environment variable, thus allowing a user to override it.
+
+Upstream-Status : Submitted [https://sourceware.org/ml/libc-alpha/2016-08/msg00746.html]
+
+---
+ locale/gen-translit.pl | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/locale/gen-translit.pl b/locale/gen-translit.pl
+index 30d3f2f..7b287fa 100644
+--- a/locale/gen-translit.pl
++++ b/locale/gen-translit.pl
+@@ -1,5 +1,5 @@
+ #!/usr/bin/perl -w
+-open F, "cat C-translit.h.in | gcc -E - |" || die "Cannot preprocess input file";
++open F, 'cat C-translit.h.in | ${CPP:-gcc -E} - |' || die "Cannot preprocess input file";
+ 
+ 
+ sub cstrlen {
+-- 
+2.9.3
+

meta/recipes-core/glibc/glibc_2.24.bb

@@ -42,7 +42,8 @@ SRC_URI = "${GLIBC_GIT_URI};branch=${SRCBRANCH};name=glibc \
 SRC_URI += "\
            file://etc/ld.so.conf \
            file://generate-supported.mk \
-"
+           file://0001-locale-fix-hard-coded-reference-to-gcc-E.patch \
+           "
 
 SRC_URI_append_class-nativesdk = "\
            file://0001-nativesdk-glibc-Look-for-host-system-ld.so.cache-as-.patch \