[PATCH]: PR fortran/33197, use MPC for complex "arc" functions

[Kaveh R. Ghazi]

From: "Tobias Burnus" <burnus@net-b.de>

> Regarding a test case: What kind of guidance do you need?

Well I was considering just copying one of the 
gfortran.dg/complex_intrinsic_*.f90 tests as a starting point.  However I 
noticed that some of them are "run" tests.  But complex_intrinsic_7.f90 is a 
wierd compile test that looks for "abort" calls in the dump file rather than 
just executing the test.  I suppose that "works" in a cross-config testrun 
but still it looks odd. :-)  Which style should I follow?

Also I wasn't aware of the need to check fortran_large_real targets.  None 
of the other complex_intrinsic_* tests seem to do that.

        Thanks,
        --Kaveh