Re: libquadmath

Re: libquadmath

[FX]

Hello Bienisaz,

> I have managed to compile the program using the quadmath, but the
> program works only if the libquadmath-0.dll is supplied in a working
> directory. I notice that there were some controversies on the internet,
> concerning the issue of static linking of the quadmath library, and
> there seems to be no clear solution available how to link the library
> statically. Is there any way to do this? I would appreciate a hint.

You should be able to link directly against libquadmath.a instead of the shared version.

> Another problem I see is that it seems impossible to dynamically
> allocate __float128 vectors by using "calloc" or "new". Is there
> any other way to achieve a dynamic allocation?

The following works for me:

__float128 *x = calloc(sizeof(__float128), 8);


> Yet another difficulty is that the list of available math functions
> does not contain some important functions, notably Bessel functions
> K0() and K1() (although some other Bessel functions are available).
> Are there any plans to extend the library by providing more functions
> and more elaborate support for I/O (like streams, for example)?
> More generally, are there any plans for further development of the
> library?

I do not think any further development is planned.


> Also, if there is any discussion list or other place where one can
> ask questions about the library, can you please indicate the address?
> Is there any place where one can contribute procedures to the library?

Ask on the gcc general mailing list: gcc@gcc.gnu.org

FX

Re: libquadmath

[FX]

>> The following works for me:
>> 
>> __float128 *x = calloc(sizeof(__float128), 8);
> 
> Well, this does not work for me. The code compiles, but during execution
> the program crashes in this place.

You will need to investigate the crash in detail, then. Maybe it is due to memory alignment, and you could use aligned_alloc() instead?

FX