| #### -caux filename Specifies a pathname for the client auxiliary file. When you give a filename, do not give a file extension; the idl compiler appends .c to the C source file and .o to the object file. If you do not use the -caux argument, the idl compiler appends _caux.c to the C source file and _caux.o to the object file. If the -lang cxx option is used, the source file has a .cxx extension. This option allows makefile compatibility with OSF DCE Release 1.0.2 and earlier releases. For more information, see the caution notes in the Description topic of this reference page. ####