AC_ARG_WITH(nicklen,
AC_HELP_STRING([--with-nicklen=LENGTH],[Set the nick length to LENGTH (default 15, max 50)]),
[
+ if ! expr "$withval" + 0 >/dev/null 2>&1; then
+ AC_ERROR([NICKLEN must be a numeric value])
+ fi
if test $withval -ge 50; then
NICKLEN=50
AC_MSG_WARN([NICKLEN has a hard limit of 50. Setting NICKLEN=50])