From 67595e8244ed67910f7372873cdbf674c2e85403 Mon Sep 17 00:00:00 2001
From: NIIBE Yutaka <gniibe@fsij.org>
Date: Fri, 6 Aug 2021 14:10:30 +0900
Subject: posix-lock: Support GNU C library 2.34 or later.

* configure.ac: Add check for sys/single_threaded.h.
* src/posix-lock.c [USE_POSIX_THREADS_FROM_LIBC]: Use
__libc_single_threaded to detect if it's single threaded.

--

GnuPG-bug-id: 5547
Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
---
 configure.ac | 1 +
 1 file changed, 1 insertion(+)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index 23a664e..da013d8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -477,6 +477,7 @@ else
   if test "$gl_threads_api" = posix; then
     AC_CHECK_SIZEOF(pthread_mutex_t,,[AC_INCLUDES_DEFAULT
                                       #include <pthread.h>])
+    AC_CHECK_HEADERS([sys/single_threaded.h])
   fi
 fi
 
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