Manipulating array descriptors from C?

[ivanpribec]

@PierU

And it also explains why adding target doesn’t help, as the compiler has no way to avoid the pseudo copy-in/copy-out.

The gfortran documentation mentions the conversion that has to take place:

Note: Currently, GNU Fortran does not use internally the array descriptor (dope vector) as specified in the Technical Specification, but uses an array descriptor with different fields in functions without the BIND(C) attribute. Arguments to functions marked BIND(C) are converted to the specified form.