libc compatibility table (mlock - optopt)

Name of Interface	Legacy compatibility				UDK compatibility
	Compiled using SCO OpenServer DevSys		Compiled using SCO UnixWare 2.1.X SDK		Compiled using UnixWare 7 UDK
	Library Name	Works on UnixWare 7?	Library Name	Works on UnixWare 7?	Library Name	Works on SCO OpenServer?	Works on SCO UnixWare 2.1.X?
mlock	libc	Yes	libc	Yes	libc	Yes	Yes
mlockall	libc	Yes	libc	Yes	libc	Yes	Yes
modf	libc	Yes	libc	Yes	libc	Yes	Yes
modff	libc	Yes	libc	Yes	libc	Yes	Yes
modfl	libc	Yes	libc	Yes	libc	Yes	Yes
modut	libc	Yes	libc89.a	Yes	libc	Yes	Yes
modutx	libc	Yes	libc89.a	Yes	libc	Yes	Yes
monitor	libc	Yes	libc	Yes	libc	Yes	Yes
mrand48	libc	Yes	libc	Yes	libc	Yes	Yes
msync	libc	Yes	libc	Yes	libc	Yes	Yes
munlock	libc	Yes	libc	Yes	libc	Yes	Yes
munlockall	libc	Yes	libc	Yes	libc	Yes	Yes
nextafter	libc	Yes	libc	Yes	libc	Yes	Yes
nextafterl	libc	Yes	libc	Yes	libc	Yes	Yes
nftw	libc	Yes	libc	Yes	libc	Yes; notes.
nftw32	--	--	libc	Yes	libc	--	Yes
nftw64	--	--	libc	Yes	libc	--	--
nl_langinfo	libc	Yes	libc	Yes	libc	Yes; notes.	Yes
nrand48	libc	Yes	libc	Yes	libc	Yes	Yes
offsetof	libc	Yes	libc	Yes	libc	Yes	Yes
opendir	libc	Yes	libc	Yes	libc	Yes	Yes
optarg	libc	Yes	libc	Yes	libc	Yes	Yes
optind	libc	Yes	libc	Yes	libc	Yes	Yes
opterr	libc	Yes	libc	Yes	libc	Yes	Yes
optopt	libc	Yes	libc	Yes	libc	Yes	Yes

``Compatibility Table Legend''