GNU Fortran supports some of the new features of the Technical Specification (TS) 29113 on Further Interoperability of Fortran with C. The wiki has some information about the current TS 29113 implementation status. In particular, the following is implemented.
See also Further Interoperability of Fortran with C.
OPTIONAL
attribute is allowed for dummy arguments
of BIND(C) procedures.
RANK
intrinsic is supported.
ASYNCHRONOUS
attribute is compatible with TS 29113.
TYPE(*)
.
DIMENSION(..)
). However, the array descriptor
of the TS is not yet supported.