From 491bb14c0c9cf040154d57e246206ffb2f86a7e5 Mon Sep 17 00:00:00 2001
From: fanquake <fanquake@gmail.com>
Date: Fri, 10 Jun 2022 11:14:49 +0100
Subject: build: test for timingsafe_bcmp

Code introduced in #15649 added usage of `timingsafe_bcmp()`, if
available, otherwise falling back to our own implementation. However
the relevant build system check was never added, so currently, we'll
always just use our implementation, as HAVE_TIMINGSAFE_BCMP will never
be defined.

Add the check for timingsafe_bcmp. Note that as far as I'm aware, it's
only available on OpenBSD.
---
 configure.ac | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index f6d00d0283..003d76989b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -998,6 +998,8 @@ AC_CHECK_DECLS([setsid])
 
 AC_CHECK_DECLS([pipe2])
 
+AC_CHECK_FUNCS([timingsafe_bcmp])
+
 AC_CHECK_DECLS([le16toh, le32toh, le64toh, htole16, htole32, htole64, be16toh, be32toh, be64toh, htobe16, htobe32, htobe64],,,
     [#if HAVE_ENDIAN_H
                  #include <endian.h>
-- 
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