From: Hallvard Furuseth <hallvard@openldap.org>
Date: Fri, 3 Jul 2015 20:38:50 +0000 (+0200)
Subject: ITS#7969 Wrap unportable __sync_synchronize in #if
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=a937740aa0c47dc7a1a5e9be42dcea2dd3c81683;p=openldap

ITS#7969 Wrap unportable __sync_synchronize in #if
---

diff --git a/libraries/liblmdb/mdb.c b/libraries/liblmdb/mdb.c
index 2d2486d02b..ae82bb2fa4 100644
--- a/libraries/liblmdb/mdb.c
+++ b/libraries/liblmdb/mdb.c
@@ -3744,7 +3744,8 @@ mdb_env_write_meta(MDB_txn *txn)
 		mp->mm_dbs[0] = txn->mt_dbs[0];
 		mp->mm_dbs[1] = txn->mt_dbs[1];
 		mp->mm_last_pg = txn->mt_next_pgno - 1;
-#if !(defined(_MSC_VER) || defined(__i386__) || defined(__x86_64__))
+#if (__GNUC__ * 100 + __GNUC_MINOR__ >= 404) && /* TODO: portability */	\
+	!(defined(__i386__) || defined(__x86_64__))
 		/* LY: issue a memory barrier, if not x86. ITS#7969 */
 		__sync_synchronize();
 #endif