Using external mathematical libraries

For some programs it is desirable to use existing mathematical libraries written in C or Fortran or other languages, e.g. the NAG libraries.

This is possible by externally loading the libraries into Poplog. This can save work duplicating code, and also produce faster performance than rewriting the programs in Pop-11.

The mechanisms for linking in external programs are described in

    REF EXTERNAL
    REF EXTERNAL_DATA
    REF DEFSTRUCT
        These files describe the basic mechanisms for linking in and
        communicating with "external" programs.

    HELP EXTERNAL
    HELP NEWEXTERNAL
    HELP NEWC_DEC
    HELP FORTRAN_DEC
        These files describe higher level language-specific tools
        for managing external programs.