Is this compile warning normal?

[laurent.duperval@microcell.ca]

I'm compiling on a Mandrake 9.0 system. Why would I see this message when
compiling IMAP?

You are building for traditional Linux. Most modern Linux
systems require that you build using make slx. Do you want
to continue this build? Type y or n please:

L

-- 
Laurent Duperval <laurent.duperval@microcell.ca>

My feeling is that, while we should have the deepest respect for reality, we
should not let it control our lives.