https://sourceware.org/git/?p=elfutils.git;a=commit;h=51373aa9a77ef53d237edc1af664efcbb49f1bf5

From 51373aa9a77ef53d237edc1af664efcbb49f1bf5 Mon Sep 17 00:00:00 2001
From: Florian Weimer <fweimer@redhat.com>
Date: Sat, 22 Apr 2023 21:37:09 +0200
Subject: [PATCH] testsuite: Avoid C99 compatibility issues in
 run-native-test.sh

Include <unistd.h> for the pause function, and add the return type
of main.  Avoids an implicit function declaration and implicit int.

Signed-off-by: Florian Weimer <fweimer@redhat.com>
--- a/tests/run-native-test.sh
+++ b/tests/run-native-test.sh
@@ -27,7 +27,8 @@
 # in all builds.
 
 tempfiles native.c native
-echo 'main () { while (1) pause (); }' > native.c
+printf '#include <unistd.h>\nint main (void) { while (1) pause (); }\n' \
+  > native.c
 
 native=0
 kill_native()
-- 
2.31.1