ULTRIX

Home

Retro Systems

Digital

ULTRIX

Useful Stuff

Compiler macros

Preprocessor	Description	Notes
`VAXC`, `vaxc`	VAX C compiler	Defined when `/usr/bin/vcc` is used.
`VAX11C`, `vax11c`	VAX-11 C compiler	Defined when `/usr/bin/vcc` is used.
`vax`	Platform is VAX	Defined when `/usr/bin/cc` is used.
`VAX`	Platform is VAX	Defined when `/usr/bin/vcc` is used.
`ultrix`	Platform is ULTRIX
`bsd4_2`	ULTRIX is a BSD
`unix`	ULTRIX is a Unix

Some of these are bogus, such as vax11c which is defined on all VAXen that are newer than the VAX-11. There are also some symbols defined via sys/ansi_compat.h that are worth looking at.

If neither vaxc/VAXC, vax11c/VAX11C, or __DECC are defined, then it is safe to assume the compiler is /usr/bin/cc.

Manual pages also hint at DEC C (the OSF/1 compiler?) being available for ULTRIX, but I don't have it on my ULTRIX 4.5 installation.