[gdal-dev] Issue with gdalchksum on Fedora 21 ppc64le?

[Gawade P]

 Thanks, Even. I will dig into this more based on your inputs.

On Tue, Aug 25, 2015 at 1:48 PM, Even Rouault
<even.rouault at spatialys.com> wrote:
> Le mardi 25 août 2015 07:28:46, Gawade P a écrit :
>> Hi Even,
>> It looks like I am running into another checksum issue on ppc64le.
>>
>> Output on ppc64le:
>> gdalchksum.py ../autotest/gdrivers/data/nwt_grd.grd
>> 28093
>> 32304
>> 19624
>> 25856
>>
>> Output on x86:
>> gdalchksum.py ../autotest/gdrivers/data/nwt_grd.grd
>> 28093
>> 33626
>> 20260
>> 25856
>>
>> There is a mismatch for bands 2 and 3. I am looking at the code in
>> frmts/northwood/grddataset.cpp. Would this be the right place?
>
> Yes.
>
> From a quick look it doesn't appear to be the same issue as for HF2. And I've
> actually recompiled GDAL with -fsigned-char on x86_64 to simulate ppc64le
> behaviour regarding char, and the good news is that the autotest suite pass
> fine, so it seems this class of problem isn't widespread in the code base.
>
> Perhaps slighlty different floating-point rounding in the way the colormap is
> computed by nwt_LoadColors() ? Hard to tell.
>
>> Would you recommend raising an issue for this one as well? Please suggest.
>
> You can always open a ticket, at least to keep track of the issue, but that
> doesn't mean it will be automagically adressed. Especially since PPC64LE isn't
> a commonly used platform I guess.
>
> Even
>
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