document about option "-ccc-host-triple"

Hi All:

  Where can I get document about option "-ccc-host-triple"?


AFAIK, there is no such document about "-ccc-host-triple" on
clang web site [1] or help message. The pattern of this option
might looks like "armv7-none-linux-gnueabi". If anyone would like
to contribute to clang document or point out where it already is.
I am really appreciate. :wink: