& This command macro configures perl to build with
& either the alpha or generally-available version of
& VOS POSIX.1 support.
& Written 00-10-24 by Paul Green ([email protected])
&
&begin_parameters
     version   option(-version)name,allow(alpha,ga),=ga
&end_parameters
&echo command_lines
&
&if (file_info config.&version&.def date_modified) >= &+
    (file_info config.&version&.h date_modified)
&then &do
!copy_file config.&version&.def config.def -delete
&
& NOTE: We must invoke Perl 5 not Perl 4. The following
& commands runs perl5 if it exists, otherwise runs perl,
& in the hopes it is really perl5.
&
!attach_default_output (process_dir)>_where_perl ; &+
     where_command perl5 ; detach_default_output
&if (index (contents (process_dir)>_where_perl) 'perl5:') ^= 0
&then !perl5 config.pl
&else !perl  config.pl
&
!rename config.h.new config.&version&.h -delete
!delete_file config.def
&end
&
&if (file_info config.&version&.h date_modified) ^= (file_info config.h date_modified)
&then !copy_file config.&version&.h config.h -delete -keep_dates