Attempting to use an alternate installed gpc version or gpc compiled for a different machine does not work:

$ gpc -V 4.1.2 a.pas gpc: `-V' must come at the start of the command line

$ gpc -b m68k a.pas gpc: `-b' must come at the start of the command line

Problem appears to be that "init_gpc_options" inserts "-famtmpfile" and perhaps "-fsyntax-only" in front of all user-specified options, but "process_command" requires that "-V" and "-b" appear first.

Workaround is to call the desired compiler driver directly, e.g.:

$ i686-pc-mingw32-gpc-4.1.2 a.pas

...although that is somewhat awkward.

Also, if the above bug is fixed, it appears that "process_command" will invoke "<machine>-gcc-<version>" instead of "<machine>-gpc-<version>".

-- Dave