On 3 January 2024 12:42:23 WET, Waldek Hebisch <[email protected]> wrote:
>On Wed, Jan 03, 2024 at 07:07:47PM +0800, Qian Yun wrote:
>> I suggest to check for symbol instead of "#+" feature testing.
>>
>> This will allow FFI-free pure-lisp build.
>
>IMO pure-lisp build is futile. We want to use GMP, blas, lapack
>and possibly our own routines. Currently ECL and GCL use
>GMP for bignums, so that covers important part. But we also
>would like to use GMP for polynomial multiplication and for
>that purpose bypassing Lisp bignums is very desirable. Currently
>we have proof-of-concept lapack and blas interface. Main issue
>blocking its inclusion is configure machinery to detect blas
>and lapack,
you may want to use what we have in SageMath for
blas/lapack detection.
We actually only use OpenBLAS (which is the most
popular optimised open-source BLAS/LAPACK implementation, available on almost
all Linux, macOS, and *BSDs)
It's very easy if pkg-config for OpenBLAS is available.
(we do some tricky things to generate pkg-config files if they are not there,
but perhaps you may just skip this, and assume it's available)
> FFI part is easy to resolve.
>
>> To quote the FriCAS development goals:
>>
>> "make it easier for external programs to interface with FriCAS"
>>
>> I think that FFI-free pure-lisp build is one step toward this goal.
>>
>> fricas0 is one example that utilizes pure-lisp build.
>>
>> In Sagemath, there's a pexpect (IO) based interface for FriCAS and
>> Maxima, but there's an additional ECL based interface for Maxima.
>> So using FriCAS as a pure-lisp library can have its advantages.
>
>Big point about ECL is ease of calling C code. And it seems that
>to get good performance using ECL we need to call C: "native"
>ECL is too slow. So really library use should include FFI.
>
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