AC_CHECK_FUNCS(select listen bind shutdown close connect)
AC_CHECK_FUNCS(fcntl setsockopt)
AC_CHECK_FUNCS(getopt_long time)
-AC_CHECK_FUNCS(mlock munlock)
AC_CHECK_FUNCS(chmod stat fstat getenv putenv strerror ctime gettimeofday)
AC_CHECK_FUNCS(getpid getgid getsid getpgid getpgrp getuid)
AC_CHECK_FUNCS(strchr strstr strcpy strncpy memcpy memset memmove)