[oe] [PATCH] [jethro] fix gcc-cross when BUILD_* are set

[Jérémy Rosen]

When building with a compiler which is not gcc the gcc-croos will still
use the $CC and $CXX variables

These variables are not set properly to BUILD_CC and BUILD_CXX by the
recipe.

This is problematic now for jethro because gcc-6 is the default compiler
for some distros (debian testing) which can't build jethro anymore


Signed-off-by: Jérémy Rosen <jeremy.rosen at smile.fr>
---
 meta/recipes-devtools/gcc/gcc-cross.inc | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/meta/recipes-devtools/gcc/gcc-cross.inc b/meta/recipes-devtools/gcc/gcc-cross.inc
index aa10633..9a2e06f 100644
--- a/meta/recipes-devtools/gcc/gcc-cross.inc
+++ b/meta/recipes-devtools/gcc/gcc-cross.inc
@@ -36,8 +36,14 @@ EXTRA_OECONF_PATHS = "\
 
 ARCH_FLAGS_FOR_TARGET += "-isystem${STAGING_DIR_TARGET}${target_includedir}"
 
+do_configure_prepend () {
+	export CC="${BUILD_CC}"
+	export CXX="${BUILD_CXX}"
+}
+
 do_compile () {
 	export CC="${BUILD_CC}"
+	export CXX="${BUILD_CXX}"
 	export AR_FOR_TARGET="${TARGET_SYS}-ar"
 	export RANLIB_FOR_TARGET="${TARGET_SYS}-ranlib"
 	export LD_FOR_TARGET="${TARGET_SYS}-ld"
-- 
2.8.1