[Buildroot] Buildroot to generate config.site for Autotools packages?

[Daniel Nyström]

Just found this:
http://www.gnu.org/software/hello/manual/autoconf/Site-Defaults.html

Maybe that's a preferable alternative to configure Autotools packages,
than the large set in _CONF_ENV?

Anyone got any experience from a config.site files?

I can see a pretty big benefit when developing and/or running
out-of-buildroot-tree builds.