$NetBSD: patch-ak,v 1.12 2015/06/15 09:27:29 joerg Exp $
--- libgc/pthread_support.c.orig	2015-04-24 01:26:16.000000000 +0000
+++ libgc/pthread_support.c
@@ -71,7 +71,7 @@
       defined(GC_DARWIN_THREADS) || defined(GC_AIX_THREADS)) || \
       defined(GC_NETBSD_THREADS) && !defined(USE_PTHREAD_SPECIFIC) || \
       defined(GC_FREEBSD_THREADS) && !defined(USE_PTHREAD_SPECIFIC) || \
-      defined(GC_OPENBSD_THREADS)
+      !defined(USE_COMPILER_TLS) || defined(GC_OPENBSD_THREADS)
 #   define USE_PTHREAD_SPECIFIC
 # endif
 #endif
@@ -595,6 +595,20 @@ static void start_mark_threads()
 	}
       }
 #   endif /* HPUX || GC_DGUX386_THREADS */
+#   if defined(__NetBSD__)
+#     define MAX_STACK_SIZE (1024 * 1024 *sizeof(word))
+      {
+	size_t old_size;
+	int code;
+
+        if (pthread_attr_getstacksize(&attr, &old_size) != 0)
+	  ABORT("pthread_attr_getstacksize failed\n");
+	if (old_size > MAX_STACK_SIZE) {
+	  if (pthread_attr_setstacksize(&attr, MAX_STACK_SIZE) != 0)
+		  ABORT("pthread_attr_setstacksize failed\n");
+	}
+      }
+#   endif
 #   ifdef CONDPRINT
       if (GC_print_stats) {
 	GC_printf1("Starting %ld marker threads\n", GC_markers - 1);
@@ -1282,6 +1296,22 @@ void GC_end_blocking(void) {
 #define __d10_sleep sleep
 #endif /* GC_DGUX386_THREADS */
 
+#undef nanosleep
+#undef usleep
+#undef sleep
+
+/* A wrapper for the standard C nanosleep function     */
+int WRAP_FUNC(nanosleep) (const struct timespec *rqtp, struct timespec *rmtp)
+{
+    int result;
+
+    GC_start_blocking();
+    result = REAL_FUNC(nanosleep)(rqtp, rmtp);
+    GC_end_blocking();
+
+    return result;
+}
+
 /* A wrapper for the standard C sleep function	*/
 int WRAP_FUNC(sleep) (unsigned int seconds)
 {