dnl CF_LEX_OPTIONS version: 1 updated: 2009/04/04 13:08:05
dnl --------------
dnl Check if the lex/flex program accepts options, i.e., %o.  This is for
dnl standard (POSIX) lex; there are some implementations that are nonstandard,
dnl or simply too buggy to consider.
AC_DEFUN([CF_LEX_OPTIONS],[
AC_MSG_CHECKING(if $LEX supports options)
cat >conftest.l <<CF_EOF
%o 1000
%%
%%
nothing	ECHO;
CF_EOF
cf_lex_options="$LEX conftest.l 1>&AC_FD_CC"
if AC_TRY_EVAL(cf_lex_options); then
cf_lex_options=yes
else
cf_lex_options=no
fi
AC_MSG_RESULT($cf_lex_options)
rm -f conftest.* $LEX_OUTPUT_ROOT.c
if test "$cf_lex_options" != yes ; then
	AC_MSG_WARN(Your $LEX program does not support POSIX options.  Get flex.)
fi
])dnl
