[PATCH] Fix -Wformat-security warning in libgfortran

[Jakub Jelinek]

Hi!

In our gcc package build, libgfortran is built with -Werror=format-security
and errors on this file.  While it is a false positive, because
cmdmsg_values[i] for any valid i don't contain % characters, IMNSHO it is
better to use "%s", msg anyway to make it clear that msg should not be
interpretted as format string.

Bootstrapped/regtested on x86_64-linux and i686-linux, ok for trunk?

2016-01-15  Jakub Jelinek  <ja...@redhat.com>

        * intrinsics/execute_command_line.c (set_cmdstat): Use "%s", msg
        instead of msg to avoid -Wformat-security warning.

--- libgfortran/intrinsics/execute_command_line.c.jj    2016-01-04 
15:14:11.000000000 +0100
+++ libgfortran/intrinsics/execute_command_line.c       2016-01-15 
14:47:32.132158422 +0100
@@ -1,6 +1,6 @@
 /* Implementation of the EXECUTE_COMMAND_LINE intrinsic.
    Copyright (C) 2009-2016 Free Software Foundation, Inc.
-   Contributed by François-Xavier Coudert.
+   Contributed by François-Xavier Coudert.
 
 This file is part of the GNU Fortran runtime library (libgfortran).
 
@@ -55,7 +55,7 @@ set_cmdstat (int *cmdstat, int value)
 #define MSGLEN 200
       char msg[MSGLEN] = "EXECUTE_COMMAND_LINE: ";
       strncat (msg, cmdmsg_values[value], MSGLEN - strlen(msg) - 1);
-      runtime_error (msg);
+      runtime_error ("%s", msg);
     }
 }
 

        Jakub