[Debian-med-packaging] Bug#806243: libminc: FTBFS on mipsel

[Steve M. Robbins]

Hi,

[Adding minc-development as follow-up to previous email; 
http://www.bic.mni.mcgill.ca/pipermail/minc-development/2015-November/001223.html ]


On December 4, 2015 08:25:09 PM Jurica Stanojkovic wrote:
>  User: debian-mips at lists.debian.org
> 
> Hello,
> 
> I have tried to build package libminc_2.3.00-2 for mipsel and mips64el on
> diferent build boards: netlogic-xlp, cavium and loongson-3a. This package
> FTBFS only on loongson-3a (lemote).
> On other build machines package was built from source successfully.

That's interesting.  I have been able to reproduce the failure on the Debian's  
mipsel machine 'etler' which is longsoon.  I know Bert was trying to bring up 
a mipsel machine to test; not sure how far he got.  (Incidentally, Bert: I was 
working with the 'develop' branch as of Nov 19 and the failure persists.)

Jurica: is everything else the same between your good/bad environments, 
specifically: libc, compiler, and libnetcdf?  I mean: I assume they are both 
running 'sid', but are the specific versions of each package the same?

If all that is the same -- could it be something in the hardware?  The failing 
code is basically arithmetic mapping a double-value into another type, e.g. 
integer (of different sizes).  The failing test is for the mapping of 
-2*FLT_MAX, which should map to the low end of the output range but instead 
maps to the high end.  Is there anything different in the hardware that would 
maybe round things differently?  

Thanks,
-Steve
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