Autoconf issues

[Sensei]

Hi.

I'm trying to develop an application for linux as well as for macosx. 
Now I'm here facing two problems:

1. shared libraries suffixes (.so, .dynlib)
2. library needs

I will explain myself: on linux I have to check for x11 (libX11.so) and 
opengl (libgl.so & co). On macosx I have to check for opengl framework 
(-framework AGL) or for the libraries directly (libgl.dylib & co) and 
*not* x11.

How can I do this with autoconf? Are there examples from which I can get 
hints?
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Sensei    <mailto:senseiwa@tin.it>
          <icqnum:241572242>
          <msn-id:Sensei_Sen@hotmail.com>
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