How to do portable 64 bit arithmetic, without compiler warnings

Question

I occasionally use 64 bit arithmetic in an open source C++ library of mine. I discovered that long long serves my purpose quite nicely. Even some 10 year old solari

Answer 1

In GCC use the -Wno-long-long compiler option to suppress that particular warning.

You could also use -std=C++0x, but will probably reduce portability further.