Often optimizations are incompatible with debuggers because optimizers will re-organize variables on the stack for efficiency, um, basically optimizing the thing.

Optimizers are more aggressive and less forgiving of dodgy code.

Also, if you are using C++ libraries, have these been built with the same optimizations?


Use maximum warning and errors during compilation, for HPUX compilers I use "-Aa -D_HPUX_SOURCE +e +We".

Try GCC and see if that exposes anything, again use "-Wall -Werror".