Why Google can't search for words prefixed with '--' ? Try searching for "--enable-thread" https://twitter.com/#!/ronbeltran/status/117457491176071168
if you prefix anything with a dash google takes that keyword out of search queries, for the most part.
so if I wanted to search for computer stuff, but nothing to do with windows, I'd type in: "computers -windows"
It can. Try to quote the term:
"--enable-thread"
(with quotes)
will yield results.