commit bash-20080221 snapshot

shell.h

@@ -89,6 +89,7 @@ extern int debugging_mode;
 extern int executing, login_shell;
 extern int interactive, interactive_shell;
 extern int startup_state;
+extern int shell_compatibility_level;
 
 /* Structure to pass around that holds a bitmap of file descriptors
    to close, and the size of that structure.  Used in execute_cmd.c. */