O/T question, but not completely

[Steve Matzura <sm@noisynotes.com>]

Please reply privately, unless you really think it's on-topic. Me, I'm
not sure.

I trying to build  a package using automake (aclocal). I have all the
tools installed that I need--autotools, autotools-dev, libtool, etc
After patching the package's configure script, I attempted to
regenerate the build files with:

aclocal -I m4/autoconfautomake

and received the following two errors:

configure.ac:87: warning: macro 'AM_PATH_MAD' not found in library
configure.ac:89: warning: macro 'AM_PATH_LAME' not found in library

I have spent over three hours scouring the net for information on
these two macros and come up with nothing except one reference in
aclocal.m4.

If you or someone you know knows how this all works, please reply
privately, with my thanks in advance to you, and to the list owner for
allowing this message.