[Bug fortran/90539] [10 Regression] 481.wrf slowdown by 25% on Intel Kaby with -Ofast -march=native starting with r271377

[tkoenig at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90539

--- Comment #21 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
OK, if the callee is a C function... what is its declaration
on the Fortran side?  Is there any interface, bind(c) or otherwise?

I suppose there must be something, otherwise nf_put_vara_double would
have a trailing underscore.

On the caller side, I see that an array is passed, but the fsym
has rank=0.  I think this would be flagged otherwise.