gcc-6.3: backport fix of check for empty string in ubsan.c

Building gcc-cross-initial with GCC7 on the host fails due to the
comparison of a pointer to an integer in ubsan_use_new_style_p, which
is forbidden by ISO C++:

ubsan.c:1474:23: error: ISO C++ forbids comparison between pointer and
integer [-fpermissive]
       || xloc.file == '\0' || xloc.file[0] == '\xff'

Backport the fix from upstream GCC to enable the build with GCC 7

(From OE-Core rev: 7a7fcbab0365b9501c737dbc02715be14dda72a3)

Signed-off-by: Joshua Lock <joshua.g.lock@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/meta/recipes-devtools/gcc/gcc-6.3.inc b/meta/recipes-devtools/gcc/gcc-6.3.inc
index da7a083c08..71d0affb89 100644
--- a/meta/recipes-devtools/gcc/gcc-6.3.inc
+++ b/meta/recipes-devtools/gcc/gcc-6.3.inc
@@ -84,6 +84,7 @@ SRC_URI = "\
 "
 BACKPORTS = "\
            file://CVE-2016-6131.patch \
+           file://ubsan-fix-check-empty-string.patch \
 "
 SRC_URI[md5sum] = "677a7623c7ef6ab99881bc4e048debb6"
 SRC_URI[sha256sum] = "f06ae7f3f790fbf0f018f6d40e844451e6bc3b7bc96e128e63b09825c1f8b29f"