configure doesn't check for clog and csqrt

configure doesn't check for clog and csqrt

[Han-Wen Nienhuys]

Apparently, in GUILE-1.8.1 configure doesn't check for clog and csqrt().
This leads to problems on Freebsd 4.1, as the libc there doesn't support 
both functions.

-- 
  Han-Wen Nienhuys - hanwen@xs4all.nl - http://www.xs4all.nl/~hanwen



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Re: configure doesn't check for clog and csqrt

[Ludovic Courtès]

Hi,

Han-Wen Nienhuys <hanwen@xs4all.nl> writes:

> Apparently, in GUILE-1.8.1 configure doesn't check for clog and csqrt().
> This leads to problems on Freebsd 4.1, as the libc there doesn't
> support both functions.

Does it provide them in some other library, like `-lm'?

Thanks,
Ludovic.


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Re: configure doesn't check for clog and csqrt

[Kevin Ryde]

ludovic.courtes@laas.fr (Ludovic Courtès) writes:
>
> Han-Wen Nienhuys <hanwen@xs4all.nl> writes:
>
>> Apparently, in GUILE-1.8.1 configure doesn't check for clog and csqrt().
>> This leads to problems on Freebsd 4.1, as the libc there doesn't
>> support both functions.
>
> Does it provide them in some other library, like `-lm'?

(There's a test, it assumes there presence of "complex double" means
the complex funcs exist ...)


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Re: configure doesn't check for clog and csqrt

[Ludovic Courtès]

Hi,

Kevin Ryde <user42@zip.com.au> writes:

> ludovic.courtes@laas.fr (Ludovic Courtès) writes:
>>
>> Han-Wen Nienhuys <hanwen@xs4all.nl> writes:
>>
>>> Apparently, in GUILE-1.8.1 configure doesn't check for clog and csqrt().
>>> This leads to problems on Freebsd 4.1, as the libc there doesn't
>>> support both functions.
>>
>> Does it provide them in some other library, like `-lm'?
>
> (There's a test, it assumes there presence of "complex double" means
> the complex funcs exist ...)

So what?  :-)

My understanding of Han-Wen's report is that FreeBSD has `complex
double' but does not provide `clog ()' et al. as part of its libc.
Thus, checking for the presence of those functions may be necessary
_even if_ complex doubles are available.

C99 (Section 7) does not seem to say whether these functions have to be
in libc.

Thanks,
Ludovic.


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