[perl #55530] [CAGE] OpenGL configure step emits a large number of warnings

[James Keenan via RT]

I'm not on Gentoo, but on Debian.  Running 'perl Configure.pl' at
r28211, I don't get any of these warnings.

$ uname -a
Linux li11-226 2.6.23.1-linode36 #1 Sun Nov 4 12:03:06 EST 2007 i686
GNU/Linux