[PATCH]: Use mpc_pow in the fortran frontend

[Tobias Burnus]

Salut François-Xavier,

François-Xavier Coudert schrieb:
>> I have a bit of spare time this week-end, but not enough for serious
>> gfortran work; looks like the perfect project for me (that and
>> updating the EXECUTE_COMMAND_LINE patch).
> So, I had a harder time than I thought. I could only do the
> simplification patch, which is attached. I could not even manage to
> test it, as bootstrap is too slow on my laptop and my desk machine
> crashed :(
The patch looks OK, builds and is currently regtesting. However, a
ChangeLog and a test case (making use of the effective_target_mpc check,
Kaveh - how does one use it?) is missing. I think one can mention PR
33197 in the changelog.

Could someone review my patch?

Tobias

PS: For the inverse functions, see prelimary C99 fallback implementation
study in the PR (PR33197); I think one might be able to add this part
also soon, even though MPC itself does not have that part.