Re: [boost] [1.34.0] hash_float_test / gcc-cygwin-3.4.4

From: John Maddock (john_at_[hidden])
Date: 2007-02-20 05:36:34

Daniel James wrote:
>> On Mon, 19 Feb 2007 17:36:53 -0000, Vladimir Prus <ghost <at>
>> cs.msu.su> wrote:
>>
>>> I see no signs of any misconfiguration -- seems like
>>> hash library problem on cygwin. Would anybody be
>>> able to look into this?
>
> It looks like cygwin's ldexp and frexp don't support long doubles.
> Working around that would be too complicated at this stage. So I'll
> mark up the failure and look into dealing with it in 1.35.

Right: there is no long double std lib support - or rather there is, but the 
arguments get truncated to double internally :-(

Causes all kinds of traps for the unwary: the one I "loved" was sqrt 
returning +INF when passed a finite value!

FYI BSD has the same issues.

HTH, John.