Lines Matching full:flex
438 dnl Check for flex, default to lex
439 dnl Require flex 2.4 or higher
441 dnl Default to lex/yacc if both flex and bison are not available
442 dnl Define the yy prefix string if using flex and bison
452 dnl $3 (optional flex and bison -P prefix)
455 [AC_ARG_WITH(flex, [ --without-flex don't use flex])
460 AC_CHECK_PROGS($1, flex, lex)
462 if test "$$1" = flex ; then
464 AC_MSG_CHECKING(for flex 2.4 or higher)
466 if flex -V >/dev/null 2>&1; then
474 AC_MSG_WARN(ignoring obsolete flex executable ($s))
487 AC_MSG_WARN(don't have both flex and bison; reverting to lex/yacc)
491 if test "$$1" = flex -a -n "$3" ; then
