Re: [bug #33138] .PARLLELSYNC enhancement with patch

[Eli Zaretskii]

> Date: Sat, 27 Apr 2013 13:09:02 +0300
> From: Eli Zaretskii <address@hidden>
> Cc: address@hidden, address@hidden
> 
> > The basic feature can be tested trivially like this:
> > 
> >   all: one two
> > 
> >   one two:
> >           @echo start $@
> >           @sleep 1
> >           @echo stop $@
> > 
> > Now if you run this using "make -j" you'll get:
> > 
> >   start one
> >   start two
> >   stop one
> >   stop two
> > 
> > If you run this using "make -j -O" you should get:
> > 
> >   start one
> >   stop one
> >   start two
> >   stop two
> > 
> > There's more to test than that: before it's done we need to test
> > recursive make invocations for example.  But the above is simple.
> 
> Thanks, I tested this, and also the recursive behavior.

The changes needed to make -O work on MS-Windows are now committed to
the master repository, see commits da7df54 and 049f8e8.  Please review
and comment.

I also took liberty in committing a small change posted by Frank in
this thread, whereby, if taking the semaphore fails, output is dumped
unsynchronized, instead of being silently ignored.  (Btw, I don't see
Frank's assignment on file for Make, so I marked this change "tiny",
per the FSF procedures.)

Thanks to all who contributed to this (lengthy) discussion and allowed
me to understand how to implement this feature on Windows.