Re: Create common hooks structure shared between driver and cc1

[Tom Tromey <tromey@redhat.com>]

>>>>> "Joseph" == Joseph S Myers <joseph@codesourcery.com> writes:

Joseph> dependencies.  For the latter, I looked again at Tom's reverted patch
Joseph> from March 2008 to use automatic dependency generation.  Although
Joseph> there is now a fixed GNU make release (since last July), and although
Joseph> I'd like to see automatic dependency generation go in (I hope Paolo
Joseph> may follow up on it as per
Joseph> <http://gcc.gnu.org/ml/gcc-patches/2008-03/msg01721.html>), actually
Joseph> getting it working looks like a potential rathole and I couldn't
Joseph> figure out from the 2008 thread what the makefile feature was that
Joseph> caused problems with a GNU make bug and whether it would be possible
Joseph> to disable use of that feature (instead having stupid dependencies of
Joseph> all objects on all headers) when using older versions of make (which
Joseph> would I think be desirable, to avoid forcing everyone to upgrade make
Joseph> immediately).

I believe the bugs referenced here were the problem:

    http://gcc.gnu.org/ml/gcc-patches/2008-03/msg01680.html

Both these bugs use .INTERMEDIATE in their test cases, but it isn't
clear to me that this is a sufficient condition.

My understanding is that the bug has been fixed in GNU make 3.82.  As
you point out, this has been out nearly a year; I think upgrading is not
an extreme hardship.

If you wanted to experiment with Makefile workarounds, I think the
simplest way would be to check out the revision before the patch was
reverted.  Trying to apply the patch to current trunk is indeed a
rathole.

Tom