+void
+Sources::set_path(File_path *f_C)
+{
+ path_C_ = f_C;
+}
+
+/**
+ open a file
+
+ @param file_str the file to be opened, name might be changed if it
+ is found in a search path.
+
+ @return 0 if no file found
+ */
+Source_file*
+Sources::get_file_l(String &file_str )