Flex check in configure

Hi again, I am looking at the flex check in configure.in again. If flex is not present, or is not version 2.5.4 then you may get your environment dumped to stdout while running configure. This is due to the set command being run with no arguments. Although non-fatal - it certainly is ugly. Part of the problem with flex versions is that they are not consistant :-p I took a crack at a fix, but am uncomfortable making the change as I don't really have the history on this one. If some of you out there would be so kind as to point out any flaws in my reasoning, I would apreciate it. (For example, there is a grep for the line containing 'version' that I don't seem to need with the 3 versions of flex I checked). If one of you config wizards wants to make the change - be my guest. Dave here is what the current test looks like: set `echo "" | $LEX -V -v --version 2>/dev/null | grep 'version' | cut -d ' ' -f 3 | sed -e 's/\./ /g' | sed -e 's/[^0-9 ]//g'` if test "${1}" != "2" -o "${2}" != "5" -o "${3}" -lt "4"; then

        AC_MSG_WARN(You will need flex 2.5.4 or later if you want to regenerate

Zend/PHP lexical parsers.) fi I am proposing: flexvers=`echo "" | $LEX -V -v --version 2>/dev/null | sed -e 's/^.* //' -e 's/\ ./ /g'` if test ! -z "$flexvers"; then set $flexvers if test "${1}" != "2" -o "${2}" != "5" -o "${3}" -lt "4"; then

       AC_MSG_WARN(You will need flex 2.5.4 or later if you want to regenerate

Zend/PHP lexical parsers.) fi fi