PR 62215 Reinstate unlinking old module file before renaming.

2014-08-29  Jeffrey Armstrong  <jeffrey.armstrong@approximatrix.com>

	PR fortran/62215
	* module.c (gfc_dump_module): Unlink old module file before
	renaming new one.

From-SVN: r214742

gcc/fortran/ChangeLog

+2014-08-29  Jeffrey Armstrong  <jeffrey.armstrong@approximatrix.com>
+
+	PR fortran/62215
+	* module.c (gfc_dump_module): Unlink old module file before
+	renaming new one.
+
 2014-08-26  Thomas Koenig  <tkoenig@gcc.gnu.org>
 
 	* frontend_passes (expr_array):  Replace by vec template.

gcc/fortran/module.c

@@ -6040,6 +6040,9 @@ gfc_dump_module (const char *name, int dump_flag)
       || crc_old != crc)
     {
       /* Module file have changed, replace the old one.  */
+      if (unlink (filename) && errno != ENOENT)
+	gfc_fatal_error ("Can't delete module file '%s': %s", filename,
+			 xstrerror (errno));
       if (rename (filename_tmp, filename))
 	gfc_fatal_error ("Can't rename module file '%s' to '%s': %s",
 			 filename_tmp, filename, xstrerror (errno));