diff --git a/libs/libc/libc.csv b/libs/libc/libc.csv
index a1e246d3f75..8be028375f5 100644
--- a/libs/libc/libc.csv
+++ b/libs/libc/libc.csv
@@ -18,6 +18,7 @@
 "b16sqr","fixedmath.h","!defined(CONFIG_HAVE_LONG_LONG)","b16_t","b16_t"
 "basename","libgen.h","","FAR char *","FAR char *"
 "btowc","wchar.h","defined(CONFIG_LIBC_WCHAR)","wint_t","int"
+"calloc","stdlib.h","","FAR void *","size_t","size_t"
 "cfgetspeed","termios.h","defined(CONFIG_SERIAL_TERMIOS)","speed_t","FAR const struct termios *"
 "cfsetspeed","termios.h","defined(CONFIG_SERIAL_TERMIOS)","int","FAR struct termios *","speed_t"
 "chdir","unistd.h","!defined(CONFIG_DISABLE_ENVIRON)","int","FAR const char *"
@@ -52,6 +53,8 @@
 "ftell","stdio.h","defined(CONFIG_FILE_STREAM)","long","FAR FILE *"
 "fwrite","stdio.h","defined(CONFIG_FILE_STREAM)","size_t","FAR const void *","size_t","size_t","FAR FILE *"
 "getcwd","unistd.h","!defined(CONFIG_DISABLE_ENVIRON)","FAR char *","FAR char *","size_t"
+"gethostbyname","netdb.h","defined(CONFIG_LIBC_NETDB)","FAR struct hostent *","FAR const char *"
+"gethostbyname2","netdb.h","defined(CONFIG_LIBC_NETDB)","FAR struct hostent *","FAR const char *","int"
 "gethostname","unistd.h","","int","FAR char *","size_t"
 "getopt","unistd.h","","int","int","FAR char * const []|FAR char * const *","FAR const char *"
 "getoptargp","unistd.h","","FAR char **"
@@ -155,6 +158,7 @@
 "sigemptyset","signal.h","","int","FAR sigset_t *"
 "sigfillset","signal.h","","int","FAR sigset_t *"
 "sigismember","signal.h","","int","FAR const sigset_t *","int"
+"signal","signal.h","","_sa_handler_t","int","_sa_handler_t"
 "sleep","unistd.h","","unsigned int","unsigned int"
 "snprintf","stdio.h","","int","FAR char *","size_t","FAR const IPTR char *","..."
 "sprintf","stdio.h","","int","FAR char *","FAR const IPTR char *","..."