[gentoo-amd64] Compiler Flag -m64 Gives Warning

[Frank Peters]

Hello everyone,

I just switched to Gentoo from another distribution and my
only regret is that I did not make the switch much earlier.
Gentoo is a fantastic way of managing Linux and I am grateful
to all those who have made it possible.

However, as I continue to build my current Linux x64 (amd64)
system with emerge, there is one minor annoyance that I can't
eliminate.  During each emerge there is a warning message:

* Your CFLAGS contains "-m64" which can break packages.
* Your CXXFLAGS contains "-m64" which can break packages.

My system is no-multilib; it is a pure 64-bit system.  The
"-m64" compiler flag will not, and does not, adversely affect
the system in any way.

As I mentioned, this warning is merely an annoyance, but it
does slow down the emerge process for several seconds as
the program pauses to give sufficient time for the warning
message to be read.  If a large number of packages is being
emerged, this can add up to a lot of time.

Is there some way I can eliminate this warning without removing
the "-m64" option?

Frank Peters