Make 'USING_EGL=0' the default for now. It's causing too much confusion for
too many non-developers (which in turn wastes too much developer time). It
is trivially overridden from the make command line. See comments in
linux-dri.
should be defined. It was flawed on some platforms (e.g., Darwin & mingw).
Instead, rely on the build system to define it on the compiler command line.
This also reverts ajax's hand-edit to indirect_size.c. I'll fix that on the
X.org side of things later today.
linux-dri, but it disables support for direct-rendering in it. This config
mainly exists so that I can verify that changes to libGL haven't broken
builds on non-DRI platforms.