From 701eb26f97f97b3417f5600565cda2db8046599e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ond=C5=99ej=20Sur=C3=BD?= <ondrej@isc.org>
Date: Tue, 22 Aug 2023 14:23:05 +0200
Subject: [PATCH] Workaround faulty stdatomic.h header detection on Oracle
 Linux 7

Oracle Linux 7 sets __STDC_VERSION__ to 201112L, but doesn't define
__STDC_NO_ATOMICS__, so we try to include <stdatomic.h> without the
header present in the system.  Since we are already detecting the header
in the autoconf, use the HAVE_STDATOMIC_H for more reliable detecting
whether <stdatomic.h> header is present.
---
 lib/isc/include/isc/atomic.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/isc/include/isc/atomic.h b/lib/isc/include/isc/atomic.h
index 5edb0957f0..5a415bc15d 100644
--- a/lib/isc/include/isc/atomic.h
+++ b/lib/isc/include/isc/atomic.h
@@ -13,7 +13,7 @@
 
 #pragma once
 
-#if __STDC_VERSION__ >= 201112L && !defined(__STDC_NO_ATOMICS__)
+#if HAVE_STDATOMIC_H
 #include <stdatomic.h>
 #else
 #include <isc/stdatomic.h>