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Prolog on Parrot
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=head1 Parrotlog This is Parrotlog, a Prolog compiler for the Parrot virtual machine. =head2 Build requirements (installing from source) For building Parrotlog you need at least a C compiler, a C<make> utility, and Perl 5.8 or newer. To automatically obtain and build Parrot you may also need a subversion (svn) client. =head2 Building and invoking Parrotlog We generally recommend downloading Parrotlog directly from http://github.com/arnsholt/parrotlog Once you have a copy of Parrotlog, build it as follows: $ cd parrotlog $ perl Configure.pl --gen-parrot $ make This will create a "parrotlog" or "parrotlog.exe" executable in the current directory. Programs can then be run from the build directory using a command like: $ ./parrotlog <source> The C<--gen-parrot> option above tells Configure.pl to automatically download and build the most appropriate version of Parrot into a local "parrot/" subdirectory, install that Parrot into the "parrot_install/" subdirectory, and use that for building Parrotlog. It's okay to use the C<--gen-parrot> option on later invocations of Configure.pl; the configure system will re-build Parrot only if a newer version is needed for whatever version of Parrotlog you're working with. You can use C<--parrot-config=/path/to/parrot_config> instead of C<--gen-parrot> to use an already installed Parrot for building Parrotlog. This installed Parrot must include its development environment; typically this is done via Parrot's C<make install> target or by installing prebuilt C<parrot-devel> and/or C<libparrot-dev> packages. The version of the already installed Parrot must satisfy a minimum specified by Parrotlog -- Configure.pl will verify this for you. Once built, Parrotlog's C<make install> target will install Parrotlog and its libraries into the Parrot installation that was used to create it. Until this step is performed, the "parrotlog" executable created by C<make> above can only be reliably run from the root of Parrotlog's build directory. After C<make install> is performed, the installed executable can be run from any directory (as long as the Parrot installation that was used to create it remains intact). If the Parrotlog compiler is invoked without an explicit script to run, it enters a small interactive mode that allows statements to be executed from the command line. Each line entered is treated as a separate compilation unit, however (which means that subroutines are preserved after they are defined, but variables are not). =head2 Running the test suite Entering C<make test> will run a test suite that comes bundled with Parrotlog. This is a simple suite of tests, designed to make sure that the compiler is basically working and that it's capable of running a simple test harness. If you want to run the tests in parallel, you need to install a fairly recent version of the Perl 5 module L<Test::Harness> (3.16 works for sure). =head2 Where to get help or answers to questions =head2 Reporting bugs =head2 Submitting patches =head2 How the compiler works There is no documentation yet, but there is a development diary at L<http://blogs.perl.org/users/arne_skjaerholt/>. =head1 AUTHOR Arne SkjE<aelig>rholt (L<firstname.lastname@example.org>). I can also be found in #perl6 on Freenode and #parrot on irc.parrot.org, I'm usually available roughly between noon and midnight, central european time. =cut ## vim: expandtab sw=4 ft=pod tw=70: