FWSCANF (man3p)
fwscanf, swscanf, wscanf — convert formatted wide-character input
fwscanf, swscanf, wscanf — convert formatted wide-character input
regcomp, regerror, regexec, regfree — regular expression matching
isalpha, isalpha_l — test for an alphabetic character
pthread_barrier_destroy, pthread_barrier_init — destroy and initialize a barrier object
btowc — single byte to wide character conversion
ctanl — complex tangent functions
strfmon, strfmon_l — convert monetary value to a string
csinl — complex sine functions
strcasecmp, strcasecmp_l, strncasecmp, strncasecmp_l — case-insensitive string comparisons
setgrent — reset the group database to the first entry