[RFC] [PATCH] Introduce configure flag --with-stage1-cflags.

[Martin Liška]

On 05/30/2017 11:43 AM, Eric Botcazou wrote:
>> Are you sure?  In my experience -O2 gets the most test coverage during
>> lifetime of a particular release.
> 
> Yes, some older GCC releases have aliasing issues that are exposed at -O2 only 
> because of -fstrict-aliasing and -fschedule-insns.
> 

That's why we decided to enable -O2 just with GCC 4.8+.

Martin