1 files changed, 13 insertions, 0 deletions
diff --git a/thread.c b/thread.c
index ab3540b51b..955c5f9e5f 100644
--- a/thread.c
+++ b/thread.c
@@ -42,6 +42,19 @@
  */
 
 
+/*
+ * FD_SET, FD_CLR and FD_ISSET have a small sanity check when using glibc
+ * 2.15 or later and set _FORTIFY_SOURCE > 0.
+ * However, the implementation is wrong. Even though Linux's select(2)
+ * support large fd size (>FD_SETSIZE), it wrongly assume fd is always
+ * less than FD_SETSIZE (i.e. 1024). And then when enabling HAVE_RB_FD_INIT,
+ * it doesn't work correctly and makes program abort. Therefore we need to
+ * disable FORTY_SOURCE until glibc fixes it.
+ */
+#undef _FORTIFY_SOURCE
+#undef __USE_FORTIFY_LEVEL
+#define __USE_FORTIFY_LEVEL 0
+
 /* for model 2 */
 
 #include "eval_intern.h"