[Patch, Fortran] PR31298 - support multiple loading of (renamed) operators in USE

[Jerry DeLisle]

Tobias Burnus wrote:
> :ADDPATCH fortran:
> 
> This adds support for:
> 
> USE mod, only: operator(.op.), operator(.new.)=>operator(.op.),
> operator(.another.)=>operator(.op.)
> 
> Before only a single rename/import was supported.
> 
> The algorithm is partially copied from load_generic_interfaces.
> 
> I initially hoped to do:
> 
> if(i==1) [...]
>      sym = uop->operator->sym
> else [...]
>     uop->operator->sym = sym
> 
> but this fails as sym == NULL. And
> 
> if(i==1) [...]
>      operator = uop->operator
> else [...]
>     uop->operator = operator
> 
> only works if one disables gfc_free_interface() as otherwise the memory
> is deallocated twice.
> 
> Build and regression tested on x86-64/Linux. Ok for the trunk?
> 
This is OK,

Thanks,

Jerry