Lines Matching full:flex
633 dnl Check for flex, default to lex
634 dnl Require flex 2.4 or higher
636 dnl Default to lex/yacc if both flex and bison are not available
638 dnl If we're using flex and bison, pass -P to flex and -p to bison
641 dnl If we're not using flex and bison, don't pass those options
643 dnl Flex and "yacc" is a wrapper for Bison, they will work), and
646 dnl some unknown reason, choose to use --without-flex and
647 dnl --without-bison on systems that have Flex and Bison, which
662 dnl $3 (optional flex and bison -P prefix)
665 [AC_ARG_WITH(flex, [ --without-flex don't use flex])
670 AC_CHECK_PROGS($1, flex, lex)
672 if test "$$1" = flex ; then
674 AC_MSG_CHECKING(for flex 2.4 or higher)
676 if flex -V >/dev/null 2>&1; then
684 AC_MSG_WARN(ignoring obsolete flex executable ($s))
697 AC_MSG_WARN(don't have both flex and bison; reverting to lex/yacc)
701 if test "$$1" = flex -a -n "$3" ; then
