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. When using -g, the default level is DWARF 4.
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 the default DWARF
level implied by -g.
-gdwarf-2 -g produces DWARF 4
debug, because -g (a synonym for -gdwarf-4) overrides -gdwarf-2.
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