Bug#1020436: giac FTBFS with PARI 2.15.0

[Bill Allombert]

On Wed, Sep 21, 2022 at 09:01:51PM +0300, Adrian Bunk wrote:
> Source: giac
> Version: 1.9.0.19+dfsg2-1
> Severity: serious
> Tags: ftbfs
> 
> https://buildd.debian.org/status/logs.php?pkg=giac&ver=1.9.0.19%2Bdfsg2-1%2Bb1
> 
> ...
> pari.cc: At global scope:
> pari.cc:752:17: error: typedef ‘giac::PFGEN’ is initialized (use ‘decltype’ instead)
>   752 |   typedef GEN (*PFGEN)(ANYARG);
>       |                 ^~~~~
> pari.cc:752:24: error: ‘ANYARG’ was not declared in this scope

This is my comment on this bug:

PARI used to define ANYARG as
#ifdef __cplusplus
#  define ANYARG ...
#else
#  define ANYARG
#endif

This definition was removed because newer gcc/clang do not like to call
function without prototype and it was not particularly
useful.

So you can replace this by

typedef GEN (*PFGEN)();

if you like, but recent gcc 12 will issue warning.
In PARI we changed EVAL_f to cast the pointer to the right prototype
before calling it.

Sorry for the trouble.

Cheers,
-- 
Bill. <ballombe at debian.org>

Imagine a large red swirl here.