With "popt-1.3-1" the manual page says The popt library is highly portable and should work on any POSIX platform. The latest version is always available from: ftp://ftp.redhat.com/pub/redhat/code/popt. but the given ftp directory contains only versions of popt up to 1.2, and not the 1.3 from which the manual page was from.
Popt is now part of rpm-3.0.4, so get the latest popt-1.5 package from Raw Hide and the sources for it from the rpm-3.0.4*.src.rpm. Alternatively, you can try a CVS checkout: This version is also available through anonymous cvs: cvs -d :pserver:anonymous.org:/cvs/devel login (no password, just carriage return) cvs -d :pserver:anonymous.org:/cvs/devel get popt cd popt RPM sources are available from the same server.
This bug report was erroneously resolved as "not a bug" and was not fixed. There is a bug; namely, that the man page (popt.3) and the spec file (popt.spec) contain out of date information about how to obtain new versions of popt. This documentation bug has not been fixed as of today in CVS.