Concurrent tests?

[Ben Elliston]

With the exception of prerequisite tests, tests in Autoconf are
conceptually independent.  You can carry out AC_PROG_LEX and
AC_PROG_YACC concurrently.

Has any thought been given to heading in this direction in the future?
On 8-way Linux machines, build times can be dominated by the
`configure' script--once configured, a tree can be compiled in a
fraction of the overall time.  Perhaps the introduced complexity isn't
worthwhile, but I wanted to start a discussion.

Ben