Compiler directives

A compiler directive is a statement that causes the compiler to take a specific action during compilation.

CALLINTERFACE
The CALLINTERFACE directive specifies the interface convention for CALL and SET statements. The convention specified stays in effect until another CALLINTERFACE directive is encountered in the source.
DATA
The DATA directive is supported when the compiler option LP(64) is in effect. It specifies the storage location of identifiers in WORKING-STORAGE section following the directive, and applies to level 01 and 77 data items. The storage location specified stays in effect until another DATA directive is encountered in the source. The directive must not be placed in the middle of a group data item. The directive also applies to external data items.
INLINE
The INLINE directive lets you selectively prevent the compiler from considering procedures eligible for inlining. Specifying >>INLINE OFF prevents the compiler from inlining procedures referenced by PERFORM statements. If the NOINLINE compiler option is in effect, all INLINE directives are ignored. The relative location of an INLINE directive to the definition of a procedure name is important for determining the inlining behavior for that procedure.
Conditional compilation
Conditional compilation provides a way of including or omitting selected lines of source code depending on the values of literals specified by the DEFINE directive. In this way, you can create multiple variants of the same program without the need to maintain separate source streams.
COBOL/Java interoperability

Parent topic: Compiler-directing statements and compiler directives