[Rd] complex tests failure

[Kasper Daniel Hansen]

Thanks.

I assume there is no way to control this via. environment variables or
configure settings?  Obviously that would be great for something like this
which affects tests and seems to be a known problem for older C standard
libraries.

Best,
Kasper

On Thu, May 4, 2017 at 9:12 AM, Tomas Kalibera <tomas.kalibera at gmail.com>
wrote:

>
> As a quick fix, you can undefine HAVE_CTANH in complex.c, somewhere after
> including config.h
> An internal substitute, which is implemented inside complex.c, will be
> used.
>
> Best
> Tomas
>
>
>
>
> On 05/04/2017 02:57 PM, Kasper Daniel Hansen wrote:
>
>> For a while I have been getting that the complex tests fails on RHEL 6.
>> The specific issue has to do with tanh (see below for full output from
>> complex.Rout.fail).
>>
>> This is both with the stock compiler (GCC 4.4.7) and a compiler supplied
>> through the conda project (GCC 4.8.5).  The compiler supplied through
>> conda
>> ends up linking R to certain system files, so the binary is not completely
>> independent (although most dynamically linked libraries are coming from
>> the
>> conda installation).
>>
>> A search on R-devel reveals a discussion in April on an issue reported on
>> Windows with a bug in tanh in old versions of the GNU C standard library;
>> this seems relevant.  The discussion by Martin Maechler suggest "using R's
>> internal substitute".  So how do I enable this?  Or does this requires
>> updating the C standard library?
>>
>> ** From complex.Rout.fail
>>
>> stopifnot(identical(tanh(356+0i), 1+0i))
>>>
>> Error: identical(tanh(356 + (0+0i)), 1 + (0+0i)) is not TRUE
>> In addition: Warning message:
>> In tanh(356 + (0+0i)) : NaNs produced in function "tanh"
>> Execution halted
>>
>> Best,
>> Kasper
>>
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>>
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>>
>
>
>

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