GLOBALDEF is a storage class and scope attribute that declares an external variable or external file constant and causes storage to be allocated for the variable or constant. Its format is:
GLOBALDEF [(name)]
where name is an identifier that is accepted as legal syntax for compatibility with other Open PL/I extensions, but is ignored, having no effect.
For variables, the GLOBALDEF attribute implies the EXTERNAL and STATIC attributes. For file constants, it implies the EXTERNAL attribute. A given variable or file constant may be declared with the GLOBALDEF attribute in only one procedure.