Support for Symbolic Debugging

The compiler lets you generate code to support symbolic debugging while the -O1, -O2, or -O3 optimization options are specified on the command line along with -g. However, you can receive these unexpected results:

• If you specify the -O1, -O2, or -O3 options with the -g option, some of the debugging information returned may be inaccurate as a side-effect of optimization.
• If you specify the -O1, -O2, or -O3 options, the -fp option (IA-32 only) will be disabled.