default configure.cppflags

[Clemens Lang]

On Thu, Oct 03, 2013 at 10:35:54AM -0400, Daniel J. Luke wrote:
> the gcc manpage indicates that there's some extra magic ("Mark it as a
> system directory, so that it gets the same special treatment as is
> applied to the standard system directories.") that may or may not be
> what we want in this case too, although I'm not sure what that
> actually does.

I think it disables any warnings that would be caused by these headers,
e.g. if you compile with -Wextra, warnings caused by headers included
via -isystem aren't taken into consideration.

That may, or may not be something we want.

-- 
Clemens Lang