support larger int types

[Pedro Gimeno]

Torbjörn Granlund wrote, On 2016-10-13 20:38:
> We cannot play a surprise game with GMP users and GMP applications; GMP
> version X.Y should have exactly one API, not an API which is affected by
> whichever compiler happened to be used by the one who compiled GMP.
> 
> [...]
> 
> A separate question is whether we should provide every abstract integer
> type in the stdlib printf spirit.  I.e., should we have mpz_set_int,
> mpz_set_uint, mpz_set_long, mpz_set_ulong, mpz_set_int32_t,
> mpz_set_uint32_t, mpz_set_least_int32_t, mpz_set_uintmax, etc, etc?  And
> then the same for mpz_add_* and mpz_mul_*, etc.

One reasoning contradicts the other, doesn't it?, given that the C standard doesn't guarantee some of those types to exist (especially for fixed-width types). Or is that too academic?