gettimeofday: port recent C++ fix to Emacs

[gnulib.git] / lib / strerror.c

diff --git a/lib/strerror.c b/lib/strerror.c
index 8c41179..80a2f2e 100644 (file)
--- a/lib/strerror.c
+++ b/lib/strerror.c
@@ -1,6 +1,6 @@
 /* strerror.c --- POSIX compatible system error routine
 
-   Copyright (C) 2007-2011 Free Software Foundation, Inc.
+   Copyright (C) 2007-2013 Free Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -45,10 +45,13 @@ strerror (int n)
   if (msg)
     return (char *) msg;
 
+  msg = strerror (n);
+
   /* Our strerror_r implementation might use the system's strerror
      buffer, so all other clients of strerror have to see the error
-     copied into a buffer that we manage.  */
-  msg = strerror (n);
+     copied into a buffer that we manage.  This is not thread-safe,
+     even if the system strerror is, but portable programs shouldn't
+     be using strerror if they care about thread-safety.  */
   if (!msg || !*msg)
     {
       static char const fmt[] = "Unknown error %d";