-g

@PROCESS

DBG

Purpose

Generates debugging information for use by a symbolic debugger, and makes the program state available to the debugging session at selected source locations.

-g is the short form of -qdbg.

Syntax

@PROCESS:

@PROCESS DBG | NODBG

Defaults

If -g is not specified, -g0, equivalent to -qnodbg takes effect, which means that the compiler does not generate any debug information or preserve program state.

If -g is specified, the default value is -g2.

Parameters

-g0: Generates no debugging information. No program state is preserved.
-g1: Generates minimal read-only debugging information about line numbers and source file names. No program state is preserved. This option is equivalent to -qlinedebug.
-g2: Generates read-only debugging information about line numbers, source file names, and variables.

Usage

When no optimization is enabled, the debugging information is always available if you specify -g2.

Note: The current release of DBX does not support the debug information generated by IBM® Open XL Fortran for AIX® 17.1.3. A future release of DBX is planned to add this support.

Examples

Use the following command to compile myprogram.f and generate an executable program called testing for debugging:

xlf myprogram.f -o testing -g

The following command uses a specific -g level with -O2 to compile myprogram.f and generate debugging information:

xlf myprogram.f -O2 -g2

-g

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