The Question is:
I am upgrading VMS from Version 5.5-2H4 to version 7.2 (several jumps). I have a lot of programs written uning VAX C. Since I am staying with the VAX platform will they continue to work and can I continue to do development with this compiler? I know th
at the DEC C compiler is the way to go but I want to determine if I have the option to stay.
The Answer is :
VAX C was replaced by Compaq C (formerly DEC C) many years ago, and is
no longer supported.
VAX C is a user-mode application, and user-mode applications are normally
and generally expected to be upward-compatible -- so yes, this should
continue to operate.
Compaq C has a very good compatibility mode for directly compiling VAX C
programs, as well as an available migration manual (in the Compaq C for
OpenVMS VAX documentation), and can coexist on the same OpenVMS VAX system
as the VAX C compiler. All can assist with a migration to Compaq C.