--- a/sntp/configure.ac	2026-02-27 15:38:32.797019944 -0800
+++ b/sntp/configure.ac	2026-02-27 15:38:44.254081143 -0800
@@ -131,6 +131,7 @@
 
 # Checks for library functions.
 AC_CHECK_FUNCS([socket])
+AC_CHECK_FUNCS([strdup strnlen memchr strerror setrlimit strchr])
 
 NTP_UNITYBUILD