Compiler Option: -exx

Add error checking with Resume support and array bounds and null-pointer 
checking, plus stack overflow checking with gas64 backend

Syntax
   -exx

Description
   The -exx compiler option adds error checking with Resume support, array 
   bounds and null-pointer checking (including the procedure pointers), 
   plus stack overflow checking with gas64 backend.

   Use of the -exx option automatically implies -e, -exx, -earray, 
   -elocation, and -enullptr, error checking and code generation options.

Version
   * Before fbc 1.10.0, stack overflow was never checked.

See also
   * __FB_ERR__
   * Compiler Option: -e
   * Compiler Option: -earray
   * Compiler Option: -elocation
   * Compiler Option: -enullptr
   * Compiler Option: -ex
   * Error Handling
   * Using the Command Line

