ICONV (man3p)
iconv — codeset conversion function
iconv — codeset conversion function
clock_getres, clock_gettime, clock_settime — clock and timer functions
strcat — concatenate two strings
nl_langinfo, nl_langinfo_l — language information
pthread_attr_getinheritsched, pthread_attr_setinheritsched — get and set the inheritsched attribute (REALTIME THREADS)
round, roundf, roundl — round to the nearest integer value in a floating-point format
pathconf — get configurable pathname variables
mbtowc — convert a character to a wide-character code
semctl — XSI semaphore control operations
getdelim, getline — read a delimited record from stream