[chbot] gcc experts: Is there a flag/symbol available to see current optimisations?

[Charles Manning]

Thanks all

It looks like the only way to do this is by passing in something from the
Makefile. That is perhaps the way I will go.

Unfortunately at present this project is under Eclipse control so I will do
this once I move over to Makefiles.



On Sun, Jun 28, 2020 at 11:33 PM Volker Kuhlmann <list57 at top.geek.nz> wrote:

> Not that I know of. If there was, the result would be only in binaries
> containing debugging output, not in those that were stripped.
>
> To get running code to print something useful about how it was compiled,
> I define strings in the Makefile, pass them in via -Dmacro=xxx, and use
> that macro to construct a C string in the program.
>
> If you want that string to remain in the code without printing or using
> it, don't forget to to declare it volatile or the optimiser will give
> you a blank canvas...
>
> Volker
>
> --
> Volker Kuhlmann
> http://volker.top.geek.nz/      Please do not CC list postings to me.
>
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