Many functions were added to the DEC C Run-Time Library in DEC C Version 5.0 and 5.2. These functions are implemented and shipped with the OpenVMS operating system, while the documentation and header files containing their prototypes are shipped with versions of Compaq C.

You might have a newer version of Compaq C that has header files and documentation for functions that are not supported on your older OpenVMS system. For example, if your target operating system platform is OpenVMS Version 6.2, you cannot use Compaq C RTL functions that were introduced on OpenVMS Version 7.0, even though they are documented in this manual.

This appendix contains several tables that list what Compaq C RTL functions are supported on recent OpenVMS versions. This is helpful for determining the functions to avoid using on your target OpenVMS platforms.

B.1 Functions Available on all OpenVMS VAX and OpenVMS Alpha Versions

Table B-1 lists functions available on all OpenVMS VAX and OpenVMS Alpha versions.

Table B-1 Functions Available on All OpenVMS Systems

abort	abs	access	acos
alarm	asctime	asin	assert
atan2	atan	atexit	atof
atoi	atoll (Alpha)	atol	atoq (Alpha)
box	brk	bsearch	cabs
calloc	ceil	cfree	chdir
chmod	chown	clearerr	clock
close	cosh	cos	creat
ctermid	ctime	cuserid	decc$crtl_init
decc$fix_time	decc$from_vms	decc$match_wild	decc$record_read
decc$record_write	decc$set_reentrancy	decc$to_vms	decc$translate_vms
delete	delwin	difftime	div
dup2	dup	ecvt	endwin
execle	execlp	execl	execve
execvp	execv	exit	_exit
exp	fabs	fclose	fcvt
fdopen	feof	ferror	fflush
fgetc	fgetname	fgetpos	fgets
fileno	floor	fmod	fopen
fprintf	fputc	fputs	fread
free	freopen	frexp	fscanf
fseek	fsetpos	fstat	fsync
ftell	ftime	fwait	fwrite
gcvt	getchar	getcwd	getc
getegid	getenv	geteuid	getgid
getname	getpid	getppid	gets
getuid	getw	gmtime	gsignal
hypot	initscr	isalnum	isalpha
isapipe	isascii	isatty	iscntrl
isdigit	isgraph	islower	isprint
ispunct	isspace	isupper	isxdigit
kill	labs	ldexp	ldiv
llabs (Alpha)	lldiv (Alpha)	localeconv	localtime
log10	log	longjmp	longname
lseek	lwait	malloc	mblen
mbstowcs	mbtowc	memchr	memcmp
memcpy	memmove	memset	mkdir
mktemp	mktime	modf	mvwin
mv[w]addstr	newwin	nice	open
overlay	overwrite	pause	perror
pipe	pow	printf	putchar
putc	puts	putw	qabs (Alpha)
qdiv (Alpha)	qsort	raise	rand
read	realloc	remove	rename
rewind	sbrk	scanf	scroll
setbuf	setgid	setjmp	setlocale
setuid	setvbuf	sigblock	signal
sigpause	sigstack (VAX)	sigvec	sinh
sin	sleep	sprintf	sqrt
srand	sscanf	ssignal	stat
strcat	strchr	strcmp	strcoll
strcpy	strcspn	strerror	strftime
strlen	strncat	strncmp	strncpy
strpbrk	strrchr	strspn	strstr
strtod	strtok	strtoll (Alpha)	strtol
strtoq (Alpha)	strtoull (Alpha)	strtoul	strtouq (Alpha)
strxfrm	subwin	system	tanh
tan	times	time	tmpfile
tmpnam	toascii	tolower	_tolower
touchwin	toupper	_toupper	ttyname
umask	ungetc	vaxc$calloc_opt	vaxc$cfree_opt
vaxc$crtl_init	vaxc$establish	vaxc$free_opt	vaxc$malloc_opt
vaxc$realloc_opt	va_arg	va_count	va_end
va_start	va_start_1	vfork	vfprintf
vprintf	vsprintf	wait	wcstombs
wctomb	write	[w]addch	[w]addstr
[w]clear	[w]clrattr	[w]clrtobot	[w]clrtoeol
[w]delch	[w]deleteln	[w]erase	[w]getch
[w]getstr	[w]inch	[w]insch	[w]insertln
[w]insstr	[w]move	[w]printw	[w]refresh
[w]scanw	[w]setattr	[w]standend	[w]standout

B.2 Functions Available on OpenVMS Version 6.2 and Higher

Table B-2 lists functions available on OpenVMS Version 6.2 and higher.

Table B-2 Functions Added in OpenVMS Version 6.2

catclose	catgets	catopen	fgetwc
fgetws	fputwc	fputws	getopt
getwc	getwchar	iconv	iconv_close
iconv_open	iswalnum	iswalpha	iswcntrl
iswctype	iswdigit	iswgraph	iswlower
iswprint	iswpunct	iswspace	iswupper
iswxdigit	nl_langinfo	putwc	putwchar
strnlen	strptime	towlower	towupper
ungetwc	wcscat	wcschr	wcscmp
wcscoll	wcscpy	wcscspn	wcsftime
wcslen	wcsncat	wcsncmp	wcsncpy
wcspbrk	wcsrchr	wcsspn	wcstol
wcstoul	wcswcs	wcswidth	wcsxfrm
wcstod	wctype	wcwidth	wcstok

B.3 Functions Available on OpenVMS Version 7.0 and Higher

Table B-3 lists functions available on OpenVMS VAX and OpenVMS Alpha Version 7.0 and higher.

Table B-3 Functions Added in OpenVMS Version 7.0

basename	bcmp	bcopy	btowc
bzero	closedir	confstr	dirname
drand48	erand48	ffs	fpathconf
ftruncate	ftw	fwide	fwprintf
fwscanf	getclock	getdtablesize	getitimer
getlogin	getpagesize	getpwnam	getpwuid
gettimeofday	index	initstate	jrand48
lcong48	lrand48	mbrlen	mbrtowc
mbsinit	mbsrtowcs	memccpy	mkstemp
mmap	mprotect	mrand48	msync
munmap	nrand48	opendir	pathconf
pclose	popen	putenv	random
readdir	rewinddir	rindex	rmdir
seed48	seekdir	setenv	setitimer
setstate	sigaction	sigaddset	sigdelset
sigemptyset	sigfillset	sigismember	siglongjmp
sigpending	sigprocmask	sigsetjmp	sigsuspend
srand48	srandom	strcasecmp	strdup
strfmon	strncasecmp	strsep	swab
swprintf	swscanf	sysconf	telldir
tempnam	towctrans	truncate	tzset
ualarm	uname	unlink	unsetenv
usleep	vfwprintf	vswprintf	vwprintf
wait3	wait4	waitpid	wcrtomb
wcsrtombs	wcsstr	wctob	wctrans
wmemchr	wmemcmp	wmemcpy	wmemmove
wmemset	wprintf	wscanf

B.4 Functions Available on OpenVMS Alpha Version 7.0 and Higher

Table B-4 lists functions available on OpenVMS Alpha Version 7.0 and higher.

Table B-4 Functions Added in OpenVMS Alpha Version 7.0

_basename32	_basename64	_bsearch32	_bsearch64
_calloc32	_calloc64	_catgets32	_catgets64
_ctermid32	_ctermid64	_cuserid32	_cuserid64
_dirname32	_dirname64	_fgetname32	_fgetname64
_fgets32	_fgets64	_fgetws32	_fgetws64
_gcvt32	_gcvt64	_getcwd32	_getcwd64
_getname32	_getname64	_gets32	_gets64
_index32	_index64	_longname32	_longname64
_malloc32	_malloc64	_mbsrtowcs32	_mbsrtowcs64
_memccpy32	_memccpy64	_memchr32	_memchr64
_memcpy32	_memcpy64	_memmove32	_memmove64
_memset32	_memset64	_mktemp32	_mktemp64
_mmap32	_mmap64	_qsort32	_qsort64
_realloc32	_realloc64	_rindex32	_rindex64
_strcat32	_strcat64	_strchr32	_strchr64
_strcpy32	_strcpy64	_strdup32	_strdup64
_strncat32	_strncat64	_strncpy32	_strncpy64
_strpbrk32	_strpbrk64	_strptime32	_strptime64
_strrchr32	_strrchr64	_strsep32	_strsep64
_strstr32	_strstr64	_strtod32	_strtod64
_strtok32	_strtok64	_strtol32	_strtol64
_strtoll32	_strtoll64	_strtoq32	_strtoq64
_strtoul32	_strtoul64	_strtoull32	_strtoull64
_strtouq32	_strtouq64	_tmpnam32	_tmpnam64
_wcscat32	_wcscat64	_wcschr32	_wcschr64
_wcscpy32	_wcscpy64	_wcsncat32	_wcsncat64
_wcsncpy32	_wcsncpy64	_wcspbrk32	_wcspbrk64
_wcsrchr32	_wcsrchr64	_wcsrtombs32	_wcsrtombs64
_wcsstr32	_wcsstr64	_wcstok32	_wcstok64
_wcstol32	_wcstol64	_wcstoul32	_wcstoul64
_wcswcs32	_wcswcs64	_wmemchr32	_wmemchr64
_wmemcpy32	_wmemcpy64	_wmemmove32	_wmemmove64
_wmemset32	_wmemset64

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