Configuring in a subdirectory of srcdir

[Jeff Sturm <jsturm at one-point dot com>]

Looking over http://gcc.gnu.org/install/configure.html, I noticed the
following:

"First, we highly recommend that GCC be built into a separate directory
than the sources which does not reside within the source tree.
This is how we generally build GCC; building where srcdir == objdir should
still work, but doesn't get extensive testing; building
where objdir is a subdirectory of srcdir is unsupported."

I've always built in a subdirectory, and recommended that to others.  In
fact that's what the gcc_build script does by default.

Do I misunderstand, or should this paragraph be rewritten?

Jeff