[Gambas-user] cannot find symbol sinh in libc

[Jussi Lahtinen]

What I'm missing here? Sinh is also already native Gambas function.
I bet using it as external function makes it only little bit slower for
zero gain.


Jussi

On Mon, Jun 11, 2018 at 11:04 AM, Demosthenes Koptsis <
demosthenesk at gmail.com> wrote:

> Thanks Tobias!
>
> Anyway sinh is documented in glibc manual also, but it is not there as you
> say.
>
> https://www.gnu.org/software/libc/manual/html_node/Hyperboli
> c-Functions.html#Hyperbolic-Functions
>
>
> On 06/11/2018 11:07 AM, Tobias Boege wrote:
>
>> On Mon, 11 Jun 2018, Demosthenes Koptsis wrote:
>>
>>> hello,
>>>
>>> according https://www.gnu.org/software/libc/manual/html_node/Hyperboli
>>> c-Functions.html#Hyperbolic-Functions
>>>
>>> i have this external function
>>>
>>> 'double sinh (double x)
>>> Public Extern sinh_C(x As Float) As Float Exec "sinh"
>>>
>>> but i get the error "cannot find symbol sinh in libc"
>>>
>>> why?
>>>
>>> Because it is in libm:
>>
>>    Extern my_sinh(f As Float) As Float In "libm:6" Exec "sinh"
>>
>>    Print Sinh(20)
>>    Print my_sinh(20)
>>
>>    >242582597.704895
>>    >242582597.704895
>>
>> At least on my system, the manpage of sinh tells you to "Link with -lm."
>>
>> Regards,
>> Tobi
>>
>>
>
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