/BY_REF_CALL=routine-list

 /BY_REF_CALL

 Causes character constants used as actual arguments in calls to
 routines to be passed by reference (%REF) instead of by descriptor
 (%DESCR).  This helps applications that pass quoted character
 constants to numeric dummy parameters, such as applications ported
 from OpenVMS VAX systems that rely on the OpenVMS VAX Linker, to
 change the argument passing mechanism for character constant actual
 arguments.

 The "routine-list" is a list of one or more routine names (in
 parentheses); it can contain "*" wild-carding.

 The default is to always pass character constant actual arguments
 by descriptor.