[boost] -isystem and warnings

From: David Abrahams (dave_at_[hidden])
Date: 2002-10-27 14:07:19

In some of my Boost.Build v2 testing I've encountered warnings from
GCC because we're normally using -isystem to add Boost headers as part
of the #include <...> -only search path (there appears to be no other
way). I'm beginning to think that we have to give up on -isystem,
since it causes so many problems, including that on some platforms it
adds an implicit extern "C" { } wrapper. For the record, I still think
we're doing the right thing by using angle-includes for boost.

Anyway, the warnings I've been seeing are:

   boost/cast.hpp:178: warning: decimal constant is so large that it is unsigned

This one worries me a little. Has anyone tested the fencepost
condition here to make sure it's doing the right job?

-Dave

-- 
                    David Abrahams
dave_at_[hidden] * http://www.boost-consulting.com