Slackware & PAM
Building PAM for slackware 13.37. You can feel free to build the library from src, or, you may using the package source in extra/source, which included in the slackware distribution.
> ncftpget -R ftp://ftp.riken.jp/Linux/slackware/slackware64-13.37/extra/source/pam/ > sh ./pam.SlackBuild > installpkg /tmp/pam-1.1.3-x86_64-1.txz