So tap-plugins is wrong. The -lm comes *before* the .o
in the Makefile.
(what a crazy sunday...)
okay, and to finish the day (utc+2): this problem has been
solved since february in the svn of tap-plugins.
See:
http://tap-plugins.cvs.sourceforge.net/viewvc/tap-plugins/tap-plugins/Makef…
And now, let me close my mouth, I mean my keyboard.