Unix | Hacker's Compendium

Name	Macro	Value	Standard
POSIX.1-1998	`_POSIX_VERSION`	`198808L`
POSIX.1-1990	`_POSIX_VERSION`	`199009L`	ISO/IEC 9945-1:1990
POSIX.2	`_POSIX2_C_VERSION`	`199209L`	ISO/IEC 9945-2:1993
POSIX.1b-1993	`_POSIX_VERSION`	`199309L`	IEEE 1003.1b-1993
POSIX.1-1996	`_POSIX_VERSION`	`199506L`	IEEE 1003.1-1996
POSIX.1-2001	`_POSIX_VERSION`	`200112L`	IEEE 1003.1-2001
POSIX.1-2001	`_POSIX_VERSION`	`200809L`	IEEE 1003.1-2008
XPG3	`_XOPEN_VERSION`	`3`	X/Open Portability Guide 3 (1989)
XPG4	`_XOPEN_VERSION`	`4`	X/Open Portability Guide 4 (1992)
SUS	`_XOPEN_UNIX_XOPEN_VERSION`	`4`	X/Open Single UNIX Specification (UNIX95)
SUSv2	`_XOPEN_VERSION`	`500`	X/Open Single UNIX Specification, Version 2 (UNIX98)
SUSv3	`_XOPEN_VERSION`	`600`	Open Group Single UNIX Specification, Version 3 (UNIX03)
SUSv4	`_XOPEN_VERSION`	`700`	Open Group Single UNIX Specification, Version 4
LSB	`__LSB_VERSION__`	`VR`	Linux Standards Base (V = version, R = revision)