From 3cf3fbebddad4e58efbd03e4d2217f0a0d07a2ed Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Tue, 16 May 2017 16:17:57 +0200
Subject: [PATCH] build: Define __USE_UNIX98 for old glibc

Otherwise PTHREAD_MUTEX_RECURSIVE isn't defined and we get an error
with old glibc.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 src/pcm/pcm_local.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/pcm/pcm_local.h b/src/pcm/pcm_local.h
index 32e6dcdf..e4f65218 100644
--- a/src/pcm/pcm_local.h
+++ b/src/pcm/pcm_local.h
@@ -35,6 +35,7 @@
 #include "local.h"
 
 #ifdef THREAD_SAFE_API
+#define __USE_UNIX98 1	/* for old glibc */
 #include <pthread.h>
 #endif
 
-- 
2.47.1