--- a/lib/glthread/lock.c.orig	2017-02-04 15:41:52.000000000 +0100
+++ b/lib/glthread/lock.c	2017-03-10 13:20:05.000000000 +0100
@@ -34,7 +34,7 @@
 
 #  ifdef PTHREAD_RWLOCK_INITIALIZER
 
-#   if !HAVE_PTHREAD_RWLOCK_RDLOCK_PREFER_WRITER
+#   if !HAVE_PTHREAD_RWLOCK_RDLOCK_PREFER_WRITER && !defined(__GNU__)
      /* glibc with bug https://sourceware.org/bugzilla/show_bug.cgi?id=13701 */
 
 int
--- a/lib/glthread/lock.h.orig	2017-02-04 15:41:52.000000000 +0100
+++ b/lib/glthread/lock.h	2017-03-10 13:28:36.000000000 +0100
@@ -185,7 +185,7 @@
       STORAGECLASS pthread_rwlock_t NAME;
 #   define gl_rwlock_define_initialized(STORAGECLASS, NAME) \
       STORAGECLASS pthread_rwlock_t NAME = gl_rwlock_initializer;
-#   if HAVE_PTHREAD_RWLOCK_RDLOCK_PREFER_WRITER
+#   if defined(HAVE_PTHREAD_RWLOCK_RDLOCK_PREFER_WRITER) || defined(__GNU__)
 #    define gl_rwlock_initializer \
        PTHREAD_RWLOCK_INITIALIZER
 #    define glthread_rwlock_init(LOCK) \