On Thu, Oct 26, 2017 at 05:12:40PM +0000, Wilco Dijkstra wrote:
> GCC's default optimization level is -O0. Unfortunately unlike other
> compilers,
> GCC generates extremely inefficient code with -O0. It is almost unusable for
> low-level debugging or manual inspection of generated code. So a -O option is
> always required for compilation. -Og not only allows for fast compilation,
> but
> also produces code that is efficient, readable as well as debuggable.
> Therefore -Og makes for a much better default setting.
>
> Any comments?
>
> 2017-10-26 Wilco Dijkstra <wdijk...@arm.com>
>
> * opts.c (default_options_optimization): Set default to -Og.
>
> doc/
> * invoke.texi (-O0) Remove default mention.
> (-Og): Add mention of default setting.
This would only severely confuse users. -Og has lots of unresolved issues
for debugging experience, and changing the default this way is IMHO
extremely undesirable.
Jakub
