Although the Starlink HLP facility is functionally similar to the one provided with VAX/VMS, it is not tied to the VAX, makes no use of the VMS Librarian utility and Run-Time Library and does not depend (to any significant extent) on DEC Fortran extensions. Written almost entirely in ANSI-standard Fortran, the few unavoidable machine and operating system dependencies are isolated within a small number of routines which are supplied in different forms for different platforms. At present, VAX/VMS, Sun/SunOS, Sun/Solaris, DECstation/Utrix and DEC Alpha/OSF-1 variants are available (there is also a private PC/MS-Fortran version available from the author), plus functionally inferior but machine-independent variants.
The present document describes only the VAX and Unix versions. The VAX release contains also the PC versions. More information on portability issues can be found in Section 5.2.