libc compatibility table (isnan - isxdigit)

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?
isnan	libc	Yes	libc	Yes	libc	Yes; notes.	Yes
isnand	libc	Yes	libc	Yes	libc	Yes; notes.	Yes
isnanf	libc	Yes	libc	Yes	libc	Yes; notes.	Yes
isprint	libc	Yes	libc	Yes	libc	Yes	Yes
ispunct	libc	Yes	libc	Yes	libc	Yes	Yes
isspace	libc	Yes	libc	Yes	libc	Yes	Yes
isupper	libc	Yes	libc	Yes	libc	Yes	Yes
iswalnum	libc	Yes	libc	Yes	libc	Yes	Yes
iswalpha	libc	Yes	libc	Yes	libc	Yes	Yes
iswascii	libc	Yes	libc	Yes	libc	Yes	Yes
iswblank	--	--	libc	Yes	libc	--	Yes
iswcntrl	libc	Yes	libc	Yes	libc	Yes	Yes
iswctype	libc	Yes	libc	Yes	libc	Yes	Yes
iswdigit	libc	Yes	libc	Yes	libc	Yes	Yes
iswgraph	libc	Yes	libc	Yes	libc	Yes	Yes
iswlower	libc	Yes	libc	Yes	libc	Yes	Yes
iswprint	libc	Yes	libc	Yes	libc	Yes	Yes
iswpunct	libc	Yes	libc	Yes	libc	Yes	Yes
iswspace	libc	Yes	libc	Yes	libc	Yes	Yes
iswupper	libc	Yes	libc	Yes	libc	Yes	Yes
iswxdigit	libc	Yes	libc	Yes	libc	Yes	Yes
isxdigit	libc	Yes	libc	Yes	libc	Yes	Yes

``Compatibility Table Legend''