how to compile pidgin with protocol bonjour and sametime support?

[Mark Doliner]

We generally recommend people use pre-compiled binaries if they're available
for your operating system/distribution.

But to answer your question, the Bonjour and Sametime protocol plugins will be
compiled/installed when you configure && make install as long as you have the
libraries that they depend on.

For Bonjour you need either Howl (and its development headers) or Avahi's Howl
compatibility library (and its development headers).  On Ubuntu you can
"apt-get install libavahi-compat-howl0 libavahi-compat-howl-dev"

For Sametime you need libmeanwhile (and its development headers).  On Ubuntu
you can "apt-get install libmeanwhile1 libmeanwhile-dev"

-Mark