incompatibility between using 1.8.1 and 1.8.2

incompatibility between using 1.8.1 and 1.8.2

[Kamaraju S Kusumanchi]

Hi all

texmacs (www.texmacs.org) is a free wysiwyw (what you see is what you want)
editor which depends on guile-1.8-libs. Debian currently has guile
1.8.2+1-2. The previous guile version was 1.8.1+1-5.

If texmacs is compiled on a machine with guile 1.8.2+1-2 libraries and is
installed on a machine using 1.8.1+1-5 then executing texmacs is giving the
following error

texmacs.bin: Symbol `scm_i_freelist' has different size in shared
object, consider re-linking
TeXmacs] With linked TrueType support
Segmentation fault


More information about this issue can be found at
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=439923 . Can someone give
me an idea where the mistake is? Since .so version has not changed between
1.8.1 and 1.8.2, I am assuming we can mix them. Is that correct or am I
completely off the track? If it is a bug, it would be great to see a fix
for it by guile 1.8.3.

thanks in advance for any suggestions/pointers/comments...
raju
-- 
Kamaraju S Kusumanchi
http://www.people.cornell.edu/pages/kk288/
http://malayamaarutham.blogspot.com/



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Re: incompatibility between using 1.8.1 and 1.8.2

[Andreas Rottmann]

Kamaraju S Kusumanchi <kamaraju@bluebottle.com> writes:

> Hi all
>
> texmacs (www.texmacs.org) is a free wysiwyw (what you see is what you want)
> editor which depends on guile-1.8-libs. Debian currently has guile
> 1.8.2+1-2. The previous guile version was 1.8.1+1-5.
>
> If texmacs is compiled on a machine with guile 1.8.2+1-2 libraries and is
> installed on a machine using 1.8.1+1-5 then executing texmacs is giving the
> following error
>
> texmacs.bin: Symbol `scm_i_freelist' has different size in shared
> object, consider re-linking
> TeXmacs] With linked TrueType support
> Segmentation fault
>
>
> More information about this issue can be found at
> http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=439923 . Can someone give
> me an idea where the mistake is? Since .so version has not changed between
> 1.8.1 and 1.8.2, I am assuming we can mix them. Is that correct or am I
> completely off the track? If it is a bug, it would be great to see a fix
> for it by guile 1.8.3.
>
G-Wrap also has been bitten by that; from the guile-1.8 changelog.Debian:

guile-1.8 (1.8.2+1-2) unstable; urgency=low

  * Re-enable threads.

 -- Rob Browning <rlb@defaultvalue.org>  Sat, 25 Aug 2007 17:59:12 -0700

Apparently, enabling thread support changes the ABI; to verify this is
indeed the problem, try texmacs together with guile-1.8 1.8.2+1-1 - if
I'm correct, that should fix the segfault. Then just rebuild with the
latest guile-1.8 to fix the problem.

HTH, Rotty
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Re: incompatibility between using 1.8.1 and 1.8.2

[Kamaraju S Kusumanchi]

Andreas Rottmann wrote:
> G-Wrap also has been bitten by that; from the guile-1.8 changelog.Debian:
> 
> guile-1.8 (1.8.2+1-2) unstable; urgency=low
> 
>   * Re-enable threads.
> 
>  -- Rob Browning <rlb@defaultvalue.org>  Sat, 25 Aug 2007 17:59:12 -0700
> 
> Apparently, enabling thread support changes the ABI; to verify this is
> indeed the problem, try texmacs together with guile-1.8 1.8.2+1-1 - if
> I'm correct, that should fix the segfault. Then just rebuild with the
> latest guile-1.8 to fix the problem.
> 

If texmacs is compiled with guile 1.8.2+1-1, and run on a machine having
guile 1.8.2+1-1 then there are no problems. The problem arises only if
there is a mix of guile versions. Does change in ABI count as a bug?

raju
-- 
Kamaraju S Kusumanchi
http://www.people.cornell.edu/pages/kk288/
http://malayamaarutham.blogspot.com/



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Re: incompatibility between using 1.8.1 and 1.8.2

[Andreas Rottmann]

Kamaraju S Kusumanchi <kamaraju@bluebottle.com> writes:

> Andreas Rottmann wrote:
>> G-Wrap also has been bitten by that; from the guile-1.8 changelog.Debian:
>> 
>> guile-1.8 (1.8.2+1-2) unstable; urgency=low
>> 
>>   * Re-enable threads.
>> 
>>  -- Rob Browning <rlb@defaultvalue.org>  Sat, 25 Aug 2007 17:59:12 -0700
>> 
>> Apparently, enabling thread support changes the ABI; to verify this is
>> indeed the problem, try texmacs together with guile-1.8 1.8.2+1-1 - if
>> I'm correct, that should fix the segfault. Then just rebuild with the
>> latest guile-1.8 to fix the problem.
>> 
>
> If texmacs is compiled with guile 1.8.2+1-1, and run on a machine having
> guile 1.8.2+1-1 then there are no problems. The problem arises only if
> there is a mix of guile versions. Does change in ABI count as a bug?
>
If there isn't a change in the SONAME, too: Yes, IMO.

Rotty
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Re: incompatibility between using 1.8.1 and 1.8.2

[Ludovic Courtès]

Hi,

Andreas Rottmann <a.rottmann@gmx.at> writes:

> If there isn't a change in the SONAME, too: Yes, IMO.

Indeed, the single-threaded and multi-threaded libguile are not
ABI-compatible.  Changing Debian's package from single-threaded to
multi-threaded led to the problems you described.

I'm not sure whether Rob (on the Debian side) made a decision wrt. to
this.  However, there hasn't been any change upstream so far, and I'd
say it's too late for 1.8 anyway.  See this thread:

  http://thread.gmane.org/gmane.lisp.guile.devel/6760

Thanks,
Ludovic.



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