commit ede84363f2a4374b0d16ffda19fbcffdc44221c3
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Thu Nov 12 15:21:24 2015 +0000

    	* include/std/thread: Include <cerrno> for EINTR.

diff --git a/libstdc++-v3/include/std/thread b/libstdc++-v3/include/std/thread
index 5940e6e..8c01feb 100644
--- a/libstdc++-v3/include/std/thread
+++ b/libstdc++-v3/include/std/thread
@@ -38,6 +38,7 @@
 #include <chrono>
 #include <functional>
 #include <memory>
+#include <cerrno>
 #include <bits/functexcept.h>
 #include <bits/functional_hash.h>
 #include <bits/gthr.h>