PR 51803 Handle getcwd failure and lack of the function better.

2012-01-11  Janne Blomqvist  <jb@gcc.gnu.org>
            Mike Stump  <mikestump@comcast.net>
	PR libfortran/51803
	* runtime/main.c (store_exe_path): Handle getcwd failure and lack
	of the function better.

Co-Authored-By: Mike Stump <mikestump@comcast.net>

From-SVN: r183090

libgfortran/ChangeLog

+2012-01-11  Janne Blomqvist  <jb@gcc.gnu.org>
+            Mike Stump  <mikestump@comcast.net>
+	PR libfortran/51803
+	* runtime/main.c (store_exe_path): Handle getcwd failure and lack
+	of the function better.
+
 2012-01-10  Tobias Burnus  <burnus@net-b.de>
 
 	PR fortran/51197

libgfortran/runtime/main.c

@@ -116,8 +116,10 @@ store_exe_path (const char * argv0)
   memset (buf, 0, sizeof (buf));
 #ifdef HAVE_GETCWD
   cwd = getcwd (buf, sizeof (buf));
+  if (!cwd)
+    cwd = ".";
 #else
-  cwd = "";
+  cwd = ".";
 #endif
 
   /* exe_path will be cwd + "/" + argv[0] + "\0".  This will not work