View the most recent changes for the byacc port at: byacc.darwinports.com/diff
Scroll down toward the bottom of the page to get installation instructions for byacc.
The raw portfile for byacc 20090221 is located here:
http://byacc.darwinports.com/dports/devel/byacc/Portfile
Find related portfiles with the unique DarwinPorts.com search feature.
Check for any related Fink projects here: pdb.finkproject.org/pdb/package.php/byacc

# -*- coding: utf-8; mode: tcl; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- vim:fenc=utf-8:ft=tcl:et:sw=4:ts=4:sts=4
The byacc Portfile 57375 2009-09-10 08:16:41Z ryandesign macports.org $

PortSystem 1.0

Name: byacc
Version: 20090221
Category: devel
Maintainers: toby
Description: Berkeley Yacc
Long Description: Berkeley Yacc (byacc) is generally conceded to be the best yacc variant available. In contrast to bison, it is written to avoid dependencies upon a particular compiler.
Homepage: http://invisible-island.net/byacc/
Platform: darwin

Master Sites: ftp://invisible-island.net/byacc/
extract.suffix .tgz

Checksums: md5 61fff018e265ae301b80ef08ab9acb97 sha1 46d2b99fdcf555c0a9f5aac01632d7406ee371c3 rmd160 1c204109d2e45269652392bbf10cb8d5e7a84ef8

configure.args --mandir=${prefix}/share/man --program-prefix=b

livecheck.type regex
livecheck.url ftp://invisible-island.net/byacc/
livecheck.regex > byacc-(\[0-9\]+)

If you haven't already installed Darwin Ports, you can find easy instructions for doing so at the main Darwin Ports page.
Once Darwin Ports has been installed, in a terminal window and while online, type the following and hit return:

%  cd /opt/local/bin/portslocation/dports/byacc
%  sudo port install byacc  
Password: 

You will then be prompted for your root password, which you should enter. You may have to wait for a few minutes while the software is retrieved from the network and installed for you. Y ou should see something that looks similar to:

--->  Fetching byacc
--->  Verifying checksum for byacc
--->  Extracting byacc
--->  Configuring byacc
--->  Building byacc with target all

--->  Staging byacc into destroot

--->  Installing byacc

- Make sure that you do not close the terminal window while Darwin Ports is working. Once the software has been installed, you can find further information about using byacc with these commands:

%  man byacc
%  apropos byacc
%  which byacc
%  locate byacc

 Where to find more information: