+# Checks for header files.
+AC_HEADER_STDC
+AC_CHECK_HEADERS([arpa/inet.h fcntl.h inttypes.h limits.h netinet/in.h stdlib.h string.h sys/ioctl.h sys/socket.h sys/time.h unistd.h])
+
+# Checks for typedefs, structures, and compiler characteristics.
+AC_C_CONST
+AC_TYPE_SIZE_T
+AC_HEADER_TIME
+
+# Checks for library functions.
+AC_FUNC_MEMCMP
+AC_FUNC_SELECT_ARGTYPES
+AC_CHECK_FUNCS([gethostname memset select socket strchr strcspn strerror uname])
+
+# Check for GLIB 2.0