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-g, -gdwarf-2, -gdwarf-3, -gdwarf-4,

Adds debug tables for source-level debugging.

Syntax

-g

-gdwarf-version

Where:

version

is the DWARF format to produce. Valid values are 2, 3, and 4.

The -g option is a synonym for -gdwarf-4.

Usage

The compiler produces debug information that is compatible with the specified DWARF standard.

Use a compatible debugger to load, run, and debug images. For example, ARM DS-5 Debugger is compatible with DWARF 4. Compile with the -g or -gdwarf-4 options to debug with ARM DS-5 Debugger.

Legacy and third-party tools might not support DWARF 4 debug information. In this case you can specify the level of DWARF conformance required using the -gdwarf-2 or -gdwarf-3 options.

Because the DWARF 4 specification supports language features that are not available in earlier versions of DWARF, the -gdwarf-2 and -gdwarf-3 options should only be used for backwards compatibility.

Default

By default, armclang does not produce debug information.

Examples

If you specify multiple options, the last option specified takes precedence. For example:

  • -gdwarf-3 -gdwarf-2 produces DWARF 2 debug, because -gdwarf-2 overrides -gdwarf-3.
  • -g -gdwarf-2 produces DWARF 2 debug, because -gdwarf-2 overrides -g (a synonym for -gdwarf-4).
  • -gdwarf-2 -g produces DWARF 4 debug, because -g (a synonym for -gdwarf-4) overrides -gdwarf-2.
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