[PATCH] aclocal: Make missing 'dir' in -Idir a warning instead of a fatal error.

The process for bootstrapping some software from a version control system checkout involves running aclocal before the m4 directory exists, then populating the m4 directory and running aclocal again. This is what happens with, for example, the "tracker" program that can be checked out via git://gi

other/42980: fix make -j install

'make -jN install' currently has a few race conditions causing intermittent failures. - which has been fixed since, AFAICS, but - exposes a couple of separate issues: a) The toplevel target