{ "target", 0, 0, OptionArg.STRING, ref opt_target, "Target File to write (eg. roojs.js)", null },
{ "tmpdir", 0, 0, OptionArg.STRING, ref opt_tmpdir, "Temporary Directory to use", null },
- { "file", 0, 0, OptionArg.STRING, ref opt_files ,"add a file to compile", null },
+ { "file", 0, 0, OptionArg.STRING_ARRAY, ref opt_files ,"add a file to compile", null },
{ "files-from", 0, 0, OptionArg.STRING, ref opt_files_from ,"a text file listing files to compile", null },
{ "debug", 0, 0, OptionArg.NONE, ref opt_debug, "Show debug messages", null },