hermann on Sat, 17 May 2025 21:46:48 +0200


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Re: Incorporating Pari into a C program 

On 2025-05-17 09:48, Gordon Royle wrote:

Hi Pari Users

I do a lot of things with graph polynomials and their roots and for
that I use GP a lot, but only in a naïve way – essentially just
calling polrootsreal on billions of polynomials (using a Perl script
to actually format the relevant GP commands).

Now I need to do something different and although I have tried to read
the manual, I am lost.

What I need is a C function that will operate as a “plugin” to an
existing C program (not written by me).
The other answers helped with your request to call pari lib functions from C code.
PARI allows for external C functions to be called from within GP as well (the other direction). In case you ever need that, here is a simple example of making cgal lib functions available in GP: 
https://github.com/Hermann-SW/cgal4gp

Regards,

Hermann.