Re: FYI: Cleanup of debug options

On 05/11/12 17:59, Stephan Bergmann wrote:
> On 11/05/2012 05:15 PM, Michael Meeks wrote:
> >      Having done a from-clean build, and been unable to debug because my
> > autogen.lastrun contains --enable-symbols - and that now fails to do
> > anything - I did some digging to try to restore that functionality.
> >
> >      It appears that prepending:
> >
> > CFLAGS=-Os -g
> > CXXFLAGS=-Os -g
> >
> >      to your autogen.lastrun will restore the original --enable-symbols
> > functionality; and of course leaving that option there does no harm if
> > you want to share your autogen.lastrun with older versions.
> >
> >      Why do I extensively use that option, though I'm not a packager:
> >
> >      * I like to run the code the end-user runs - warts and all.
>
> Note that what the end user runs is -O2 rather than -Os IIUC.

yes...and no. both are true actually:

> [0] ms@bastet:/master > git grep -- "-O2" solenv/gbuild/ | wc -l
> 18
> [0] ms@bastet:/master > git grep -- "-Os" solenv/gbuild/ | wc -l
> 10
> [0] ms@bastet:/master > git grep -- "-O " solenv/gbuild/platform/ | wc -l
> 2

so if you want to do profiling you simply have to look up which one your
particular architecture uses first to get meaningful numbers.