When giving a port of the ht://dig web search robot a try (and the
famous Posix Porting Guide from Mark Bixby was already very helful),
I just ran into a problem where the ./configure script complains
about needing a beast called tsort to make the GNU rx stuff.

Can anybody enlighten me what tsort is and maybe even give me a
hint where I might be able to find it (either in source or binary)?

Thanks in advance.

Lars (the ht://dig stuff seems to use C++/G++ ... shudder)