Re: question on gp2c-run results

[Bill Allombert <Bill.Allombert@math.u-bordeaux.fr>]

On Mon, Jun 30, 2025 at 08:44:27AM -0700, American Citizen wrote:
> Hello:
> 
> I get the following results using the test-polred.gp file (included in this
> post)
> 
> ? \r test-polred.gp
> X = 1.4142135623730950488016887242096980786
> Y = 1.7320508075688772935274463415058723670
> poly_x = x^2 - 2
> poly_y = x^2 - 3
> [[x, x^2 - 2], [x, x^2 - 3]]
> ? \q
> Goodbye!
> 
> but running gp2c-run test-polred.gp has an unusual result for me.
> 
> owner@localhost:~/math/Herons> gp2c-run test-polred.gp
> test-polred.gp.c: In function ‘test’:
> test-polred.gp.c:40:11: error: too many arguments to function ‘polred0’
>    40 |   red_x = polred0(poly_x, 0, NULL);
>       |           ^~~~~~~
> In file included from /usr/local/include/pari/pari.h:47,
>                  from test-polred.gp.c:2:
> /usr/local/include/pari/paridecl.h:2399:9: note: declared here
>  2399 | GEN     polred0(GEN x, long flag);
>       |         ^~~~~~~
> test-polred.gp.c:41:11: error: too many arguments to function ‘polred0’
>    41 |   red_y = polred0(poly_y, 0, NULL);
>       |           ^~~~~~~
> /usr/local/include/pari/paridecl.h:2399:9: note: declared here
>  2399 | GEN     polred0(GEN x, long flag);
>       |         ^~~~~~~

The headers files does not match gp2c.
You probably need to do 'make install' in the PARI directory that was used for GP2c.

Cheers,
Bill