These services are available to applications that do not link with the POSIX subsystem.
When you are not using the POSIX subsystem, only basic C++ programming is permitted. In particular, the STDC++ library is not available outside the POSIX subsytem, restricting applications from the use of io and exception classes.
abort |
abs |
atexit |
atof |
atoi |
atol |
bcmp |
bcopy |
bsearch |
bzero |
calloc |
div |
exit |
fabs |
ffs |
free |
getchar |
getenv |
getopt |
getsubopt |
getw |
htonl |
htons |
isinf |
isnan |
isprint |
labs |
ldexp |
ldiv |
longjmp |
malloc |
memccpy |
memchr |
memcmp |
memcpy |
memmove |
memory |
memset |
mkstemp |
mktemp |
mktime |
modf |
ntohl |
ntohs |
perror |
printerr |
printf |
putc |
putchar |
putenv |
puts |
putw |
qsort |
rand |
rand_r |
random |
realloc |
realpath |
regcomp |
regerror |
regex |
regexec |
regfree |
remove |
rewind |
rindex |
scandir |
scanf |
setbuf |
setenv |
setjmp |
setstate |
setvbuf |
snprintf |
sprintf |
srand |
srandom |
sscanf |
stdarg |
strcasecmp |
strcat |
strchr |
strcmp |
strcoll |
strcpy |
strcspn |
strdup |
strerror |
strftime |
string |
strlen |
strncasecmp |
strncat |
strncmp |
strncpy |
strpbrk |
strrchr |
strsep |
strspn |
strstr |
strtod |
strtok |
strtok_r |
strtol |
strtoul |
strxfrm |
swab |
sys_errlist |
sys_nerr |
taddr2uaddr |
tempnam |
thread_once |
time |
tmpfile |
tmpnam |
toascii |
tolower |
toupper |
tzset |
uaddr2taddr |
ungetc |
unlocked |
unsetenv |
vfprintf |
vprintf |
vsnprintf |
vsprintf |