5.5.1 Modifying the macro search path: --acdir

The most obvious option to modify the search path is --acdir=dir, which changes default directory and drops the APIVERSION directory. For example, if one specifies --acdir=/opt/private/, then the search path becomes:

1. `/opt/private/'

Note that this option, --acdir, is intended for use by the internal automake test suite only; it is not ordinarily needed by end-users.