Exception Handling

Compiling code with exception handling adds some overhead in terms of both executable size and performance.

PathEngine uses a call-back based approach to error handling and does not throw or catch any exceptions explicitly, but we do include some STL headers, which, by default, do generally add a requirement for exception handling.

In many cases it's possible to turn off exception code in the STL, by adding a suitable preprocessor define.
(On the 'PC' platform we do this by _HAS_EXCEPTIONS to 0.)
Suitable compiler switches can then be added to turn off exception handling instrumentation.