From 342400e7c6630c12287fb35e475ea98da4b85eb1 Mon Sep 17 00:00:00 2001
From: David Lamparter <equinox@opensourcerouting.org>
Date: Tue, 30 Apr 2024 11:52:37 +0200
Subject: [PATCH] build: link libatomic if available

It'll generally exist but be empty on systems that don't need it.
(Some 32bit platforms now need it due to 64bit time_t, and the platform
may not have 64bit atomic ops.)

Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
---
 configure.ac | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/configure.ac b/configure.ac
index f11b345cf6..795417cd29 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1095,6 +1095,8 @@ dnl -------------------------
 AC_CHECK_HEADERS([stropts.h sys/ksym.h \
 	linux/version.h asm/types.h endian.h sys/endian.h])
 
+AC_CHECK_LIB([atomic], [main], [LIBS="$LIBS -latomic"], [], [])
+
 ac_stdatomic_ok=false
 AC_DEFINE([FRR_AUTOCONF_ATOMIC], [1], [did autoconf checks for atomic funcs])
 AC_CHECK_HEADER([stdatomic.h],[
-- 
2.39.5