getting the file extension of a shared object

[Vincent Torri]

Hey,

when a configure frile is created, shretx_cmds is defined to the file 
extension of a shared object, wrt the platform (.dll for windows, .so for 
unix, ...).

What I can do is AC_DEFINE a macro using $shrext_cmds and using that macro 
in my code.

Is there a better way to achieve that ?

thank you

Vincent Torri