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Re: Bug#351693: guile-1.6: builds on ia64, but causes other packages to


From: Rob Browning
Subject: Re: Bug#351693: guile-1.6: builds on ia64, but causes other packages to FTBFS?
Date: Fri, 14 Jul 2006 20:36:20 -0700
User-agent: Gnus/5.110006 (No Gnus v0.6) Emacs/21.4 (gnu/linux)

Neil Jerram <address@hidden> writes:

> Is anyone already working on this?  If not, I'll take a look.

I looked around a bit last night and found some relevant discussions:

  http://gcc.gnu.org/ml/gcc/2002-07/msg01417.html
  http://www.gelato.unsw.edu.au/archives/linux-ia64/0109/2178.html

I also came across this, which suggests that adding a dummy setjmp
before the getcontext call might help:

  http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/144939

So I tried adding a dummy setjmp call (which isn't actually executed)
right before getcontext in continuations.c, and that does fix the
illegal instruction when executing (call/cc (lambda (c) (c #t))).

However, without having a better understanding about what's actually
happening, I'm not inclined to treat this as a correct solution yet.

Can anyone else comment more conclusively?

Thanks
-- 
Rob Browning
rlb @defaultvalue.org and @debian.org; previously @cs.utexas.edu
GPG starting 2002-11-03 = 14DD 432F AE39 534D B592  F9A0 25C8 D377 8C7E 73A4




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