g

Syntax

    -g

Purpose
Generates debugging information used by tools such as the IBM Distributed Debugger.

Notes
Avoid using this option with -O (optimization) option. The information produced may be incomplete or misleading.

If you specify the -g option, the inlining option defaults to -Q! (no functions are inlined).

The default with -g is not to include information about unreferenced symbols in the debugging information.

To include information about both referenced and unreferenced symbols, use the -qdbxextra option with -g.

To specify that source files used with -g are referred to by either their absolute or their relative path name, use -qfullpath.

You can also use the -qlinedebug option to produce abbreviated debugging information in a smaller object size.

Example
To compile myprogram.c to produce an executable program testing so you can debug it, enter:

xlC myprogram.c -o testing -g

To compile myprogram.c to produce an executable program testing_all containing additional information about unreferenced symbols, so you can debug it, enter:

xlC myprogram.c -o testing_all -g -qdbxextra

List of Batch Compiler Options and Their Defaults
Options that Specify Debugging Features
-qlinedebug Compiler Option
Equivalent Batch Compile-Link and Incremental Build Options