https://bugs.gentoo.org/880373
https://savannah.gnu.org/bugs/index.php?63349
https://git.savannah.gnu.org/cgit/gnulib.git/commit/?id=0cc39712803ade7b2d4b89c36b143dad72404063

From 0cc39712803ade7b2d4b89c36b143dad72404063 Mon Sep 17 00:00:00 2001
From: Bruno Haible <bruno@clisp.org>
Date: Sun, 18 Oct 2020 14:37:13 +0200
Subject: obstack: Fix a clang warning.

* lib/obstack.c (print_and_abort): Mark as __attribute_noreturn__.
--- a/gnu/obstack.c
+++ b/gnu/obstack.c
@@ -326,7 +326,7 @@ int obstack_exit_failure = EXIT_FAILURE;
 #   include <libio/iolibio.h>
 #  endif
 
-static _Noreturn void
+static __attribute_noreturn__ void
 print_and_abort (void)
 {
   /* Don't change any of these strings.  Yes, it would be possible to add
-- 
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