Interoperability of Common Blocks

A C variable with external linkage can interoperate with a common block that has the BIND attribute.

If a common block has the BIND attribute, it must have the BIND attribute and the same binding label in each scoping unit in which it is declared. A C variable with external linkage interoperates with a common block with the BIND attribute if:

There need not be an associated C entity for a common block with the BIND attribute. IBM Copyright 2003