HP 3000 Manuals HP 3000 Manuals
Chapter 9 External Routines
An external routine is a routine that is not in the compilation unit that
calls it. Its source language can be the same as that of the calling
compilation unit or it can be different. This chapter explains:
* The EXTERNAL directive, which allows an HP Pascal compilation unit
to access an external routine.
* How an HP Pascal program accesses external routines written in C,
COBOL II, FORTRAN 77, FORTRAN 66/V, and SPL.
* How a switch stub allows a Native Mode HP Pascal program to access
an external routine in a Compatibility Mode SL.
* How a program written in C, COBOL II, FORTRAN 66/V, FORTRAN 77, or
SPL accesses an external HP Pascal routine.