Review Request 124881: Disable building GSL tests on MSVC

[Michael Abrahams]

> On Aug. 25, 2015, 7:41 a.m., Patrick Spendrin wrote:
> > Hm, I'd prefer if we could fix the issue itself instead? Maybe we can also update gsl (if it hasn't happened yet).

GSL 1.16 is still the most recent version, but I can update the tag to point to the most recent commit from the AMPL repo.

The error is this: 
```
Linking C executable bin\cdf_test.exe
gsl.lib(pow_int.c.obj) : error LNK2005: gsl_pow_3 already defined in gsl.lib(gamma_inc.c.obj)
bin\cdf_test.exe : fatal error LNK1169: one or more multiply defined symbols found
```

I would also prefer the underlying issue be fixed. I looked into it, but the solution was not obvious to me. Maybe it has something to do with C inlining rules?

The multiply defined function gsl_pow_3 is defined inline: https://github.com/ampl/gsl/blob/master/gsl_pow_int.h
The function is in fact used in this file, where the compiler complains, thus gsl_pow_int.h must have been included somewhere:  https://github.com/ampl/gsl/blob/master/specfunc/gamma_inc.c


- Michael


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On Aug. 22, 2015, 3:43 p.m., Michael Abrahams wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://git.reviewboard.kde.org/r/124881/
> -----------------------------------------------------------
> 
> (Updated Aug. 22, 2015, 3:43 p.m.)
> 
> 
> Review request for kdewin.
> 
> 
> Repository: emerge
> 
> 
> Description
> -------
> 
> Silences a linking error with multiply defined symbols in cdf/test.c in MSVC 2015
> 
> 
> Diffs
> -----
> 
>   portage/win32libs/gsl/gsl-disable-testing-msvc.patch PRE-CREATION 
>   portage/win32libs/gsl/gsl.py 8432312 
> 
> Diff: https://git.reviewboard.kde.org/r/124881/diff/
> 
> 
> Testing
> -------
> 
> 
> Thanks,
> 
> Michael Abrahams
> 
>

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