IA-64/VMS Options - Using the GNU Compiler Collection (GCC)

These ‘-m’ options are defined for the IA-64/VMS implementations:

-mvms-return-codes: Return VMS condition codes from main. The default is to return POSIX style condition (e.g. error) codes.
-mdebug-main=prefix: Flag the first routine whose name starts with prefix as the main routine for the debugger.
-mmalloc64: Default to 64-bit memory allocation routines.