This probably isn't relevant anymore, but for now-old (4.x I think) versions of GCC, there are a couple of caveats: * Some versions can only change compiler op

This probably isn't relevant anymore, but for now-old (4.x I think) versions of GCC, there are a couple of caveats: * Some versions can only change compiler options at top level, not within a function. * I had problems with trying to push/ignore/pop a warning around an expression in a macro, since the entire thing expands at a single location.