/tmp/ethereal-0.8.17 % ace nostromo 15:37
configure.in:28: warning: AC_PROG_LEX invoked multiple times
configure.in:2: error: undefined macro: dnl
/tmp/ethereal-0.8.17 % grep -w dnl -C3 configure nostromo Err 1
cat >conftest.$ac_ext <<_ACEOF
#line 4471 "configure"
#include "confdefs.h"
dnl
#include </usr/local/v6/include/sys/types.h>
#ifdef __V6D__
yes
--
cat >conftest.$ac_ext <<_ACEOF
#line 4490 "configure"
#include "confdefs.h"
dnl
#include <sys/param.h>
#ifdef _TOSHIBA_INET6
yes
--
cat >conftest.$ac_ext <<_ACEOF
#line 4509 "configure"
#include "confdefs.h"
dnl
#include <netinet/in.h>
#ifdef __KAME__
yes
--
cat >conftest.$ac_ext <<_ACEOF
#line 4528 "configure"
#include "confdefs.h"
dnl
#include <netinet/in.h>
#ifdef IPV6_INRIA_VERSION
yes
--
cat >conftest.$ac_ext <<_ACEOF
#line 4545 "configure"
#include "confdefs.h"
dnl
#include <sys/param.h>
#ifdef _ZETA_MINAMI_INET6
yes
which means you have a dnl quoted somewhere and you don't want it to
be there.
Looking in aclocal.m4, I found things like this:
zeta)
AC_EGREP_CPP(yes, [dnl
#include <sys/param.h>
#ifdef _ZETA_MINAMI_INET6
yes
#endif],
you don't want that dnl.
