AIX 4.3.[23], 5L, and 5.1
	Apple Darwin 1.[23] for Power Macintosh systems
	BSDI BSD/OS 4.1 for Intel-based systems
	DEC OSF/1, Digital UNIX, Tru64 UNIX 4.0, and 5.[01]
	FreeBSD 4.[23] and 5.0 for Intel-based systems
	HP-UX 11.00 and 11.11
	Linux 2.1.72 and above for Intel-based systems
	NetBSD 1.5 for Alpha, Intel, and SPARC-based systems
	NEXTSTEP 3.[13] for NEXTSTEP architectures
	OpenBSD 2.[89] for Intel-based systems
	OpenStep 4.x
	SCO OpenServer Release 5.0.[45] for Intel-based systems
	SCO UnixWare 7.1.1 for Intel-based systems
	Sequent PTX 4.4[.46], 4.5[.1], and 4.6[.1] for Sequent systems
	Solaris 2.6, 7, 8, and 9 BETA