Subject: Re: Simultaneous builds
To: David Maxwell <>
From: Alistair Crooks <>
List: tech-pkg
Date: 01/11/2002 13:42:41
PR 7590 is a good start, but it relies on shlock, which doesn't do too
well on NFS-mounted partitions.

I'm also not too sure of its availability on other platforms.


On Thu, Jan 10, 2002 at 01:18:11PM -0400, David Maxwell wrote:
> See pkg/7590, which is a look at providing a lock for just this reason.
> I never finished the code though, and no one else has felt it a pressing
> matter.
> 							David
> On Thu, Jan 10, 2002 at 12:00:59PM -0500, Amitai Schlair wrote:
> > I was helping a friend install and configure NetBSD last night, and we
> > ran into an interesting problem while adding some packages. On one
> > virtual console, we started devel/cvs building; on another, we started
> > mail/fetchmail. When we came back to check progress, we found that both
> > builds had stopped. This occurred because both packages required
> > lang/perl5, which hadn't been installed already, and both happened to
> > try building it at the same time. I don't have the precise error
> > messages, but one package terminated the make, and the other was blocked
> > in the middle of "make patch" asking for "File to patch:". It was a
> > race.
> > 
> > I would have liked pkgsrc to let the first package to descend into
> > lang/perl5 win, and have the other package block (perhaps with an
> > informative message) until Perl is installed. So I'm wondering whether
> > it's worthwhile to put a simple lock around each package build.
> > 
> > Are there other unsolved problems in pkgsrc with multiple simultaneous
> > builds? Is it desired for pkgsrc to behave well in such situations?
> > 
> > Thanks,
> > 
> > - Amitai
> -- 
> David Maxwell,| --> Although some of you out
> there might find a microwave oven controlled by a Unix system an attractive
> idea, controlling a microwave oven is easily accomplished with the smallest
> of microcontrollers. - Russ Hersch - (Microcontroller primer and FAQ)