I had exactly the same issues Gonzalo - It was not so much returning garbage as
causing a crash as the static tables (_toFloat and _eLut) seemed not to be
there in a DLL under Windows (ie, they were just a pointer into memory the
process did not own).
If you check in this message archive (under Re: [Openexr-devel] Strange issue
with half and _toFloat array) you will see I noticed that there was a comment
in createDll.cpp not being able to support this sort of functionality.
The proposed solution from Piotr was to use cmake to generate the SLN/VCProj
files (which do not rely on the createDll functionality) but I had issues with
cmake not defining PLATFORM_WINDOWS (as mentioned just recently, and easily
fixable) but also I was left with half::_toFloat and half::_eLut as unresolved
externals - suspiciously the fellas that cause the DLL crash you are talking
about.
Unfortunately I just have not had time to fully run through and come up with a
solution so I switched back to static libs in the end :(
Best Regards,
Simon
On 17 Mar 2014, at 23:34, Gonzalo Garramuño wrote:
> On 17/03/2014 05:45 p.m., Thorsten Kaufmann wrote:
>> I guess it has to do with this warning:
>>
>> 3>half.obj : warning LNK4197: export '?_toFloat@half@@0QBTuif@1@B' specified
>> multiple times; using first specification
>> 3>half.obj : warning LNK4197: export '?_eLut@half@@0QBGB' specified multiple
>> times; using first specification
>>
>> Though i am unsure how to fix that.
>
> Also, I tried the lib on a simple program which linked fine but the output
> was garbage:
>
> #include <iostream>
> #include <half.h>
>
>
> int main()
> {
> half p = 0.5f;
> std::cerr << p << std::endl;
> }
>
> $ cd <mydir>
> $ cl.exe -EHsc -IF:/code/lib/Deploy/include half.cpp -link
> -libpath:F:/code/lib/Deploy/lib/x64/Release Half.lib
> $ cp F:/code/lib/Deploy/bin/x64/Release Half.dll .
> $ half.exe
> 7.53516
>
> huh? On linux this prints out 0.5 as it should.
>
>
>
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