06-19-2013 06:38 PM - edited 06-19-2013 06:39 PM
One or the other. Whatever is in the manual.
My point was that for C/C++ applications, you have to do something at compile-time AND at link-time. For other languages, you can just redefine one of the *$LIBRARY logicals to point to older files and link.
So you can easily compile on V8.4 with the right __VMS_VER and __CRTL_VER, and link against the older [SYSLIB] and then take the .EXE back to V8.3.