interactive problem in build?

interactive problem in build?

[Greg Troxel]

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I rebuild packages in pkgsrc with pkg_rolling-replace (under NetBSD),
which does them one at a time in tsort'd dependency order.  I typically
do this by

# pkg_rolling-replace -uv &> RR.000 &

not redirecting stdin.

This works fine (module packages not building), except for guile.  With
guile (1.8 series has done this, not sure about earlier), the process
group stops due to "tty output".  Foregrounding the job for a few
seconds lets it continue.  So it seems there is something in the build
that tries to open the control tty associated with the process group.

I will try to debug this further, and find the sticking point, but I am
curious if anyone else has seen this?


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Re: interactive problem in build?

[Neil Jerram]

2008/12/11 Greg Troxel <gdt@ir.bbn.com>:
>
> This works fine (module packages not building), except for guile.  With
> guile (1.8 series has done this, not sure about earlier), the process
> group stops due to "tty output".  Foregrounding the job for a few
> seconds lets it continue.  So it seems there is something in the build
> that tries to open the control tty associated with the process group.
>
> I will try to debug this further, and find the sticking point, but I am
> curious if anyone else has seen this?

Sorry, no.  I haven't seen or heard of a problem like this before.

     Neil

Re: interactive problem in build?

[Neil Jerram]

2008/12/11 Neil Jerram <neiljerram@googlemail.com>:
>
> Sorry, no.  I haven't seen or heard of a problem like this before.

(And then immediately after sending - naturally - something occurs...)

Unless it's the popen test.  I believe we still have half-a-fix
pending somewhere for an occasional hang in that test.  And it's
conceivable that that could involve tty output.

      Neil

Re: interactive problem in build?

[Ludovic Courtès]

Hi Greg,

Greg Troxel <gdt@ir.bbn.com> writes:

> This works fine (module packages not building), except for guile.  With
> guile (1.8 series has done this, not sure about earlier), the process
> group stops due to "tty output".  Foregrounding the job for a few
> seconds lets it continue.  So it seems there is something in the build
> that tries to open the control tty associated with the process group.

Is the test suite run as well or is it just the build itself?

Thanks,
Ludo'.

Re: interactive problem in build?

[Ludovic Courtès]

"Neil Jerram" <neiljerram@googlemail.com> writes:

> 2008/12/11 Neil Jerram <neiljerram@googlemail.com>:
>>
>> Sorry, no.  I haven't seen or heard of a problem like this before.
>
> (And then immediately after sending - naturally - something occurs...)
>
> Unless it's the popen test.  I believe we still have half-a-fix
> pending somewhere for an occasional hang in that test.  And it's
> conceivable that that could involve tty output.

I had it in mind too, but I didn't dare to name it.  :-)

On NixOS, the build daemon ends up waiting until the "sleep 999"
terminate, which is annoying, so we have applied Neil's patch that uses
"read" instead of "sleep":

  https://svn.nixos.org/repos/nix/nixpkgs/trunk/pkgs/development/interpreters/guile/popen-zombie.patch

For a discussion, see:

  http://permalink.gmane.org/gmane.lisp.guile.devel/7078

Thanks,
Ludo'.

Re: interactive problem in build?

[Neil Jerram]

2008/12/11 Ludovic Courtès <ludo@gnu.org>:
>
> I had it in mind too, but I didn't dare to name it.  :-)
>
> On NixOS, the build daemon ends up waiting until the "sleep 999"
> terminate, which is annoying, so we have applied Neil's patch that uses
> "read" instead of "sleep":
>
>  https://svn.nixos.org/repos/nix/nixpkgs/trunk/pkgs/development/interpreters/guile/popen-zombie.patch
>
> For a discussion, see:
>
>  http://permalink.gmane.org/gmane.lisp.guile.devel/7078

FWIW, I do plan to get back to this sometime, hopefully "soon"!

     Neil

Re: interactive problem in build?

[Greg Troxel]

ludo@gnu.org (Ludovic Courtès) writes:

> Hi Greg,
>
> Greg Troxel <gdt@ir.bbn.com> writes:
>
>> This works fine (module packages not building), except for guile.  With
>> guile (1.8 series has done this, not sure about earlier), the process
>> group stops due to "tty output".  Foregrounding the job for a few
>> seconds lets it continue.  So it seems there is something in the build
>> that tries to open the control tty associated with the process group.
>
> Is the test suite run as well or is it just the build itself?

Just the build.

But, I tried to get this to fail again, and couldn't.  I wonder if it's
necessary that the installed guile be different - I get stuck quite
often on upgrades.

Re: interactive problem in build?

[Neil Jerram]

2008/12/14 Greg Troxel <gdt@ir.bbn.com>:
>
> Just the build.

OK.

> But, I tried to get this to fail again, and couldn't.  I wonder if it's
> necessary that the installed guile be different - I get stuck quite
> often on upgrades.

Well I guess you could try to repro that hypothesis, if you had spare
time and inclination...

I believe the build code does try to avoid picking up anything (of
Guile/libguile) already installed.  But I think we're relying here on
libtool and details of the underlying OS, so it wouldn't be a massive
surprise to discover that it works perfectly on GNU/Linux, but not on
NetBSD.

Regards,
        Neil