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Opt Level 4



Hello

I read about link time optimization in the compiler's manual, which would be activated by opt level 4 (opt_level=4), see http://www.ti.com/lit/ug/spru514d/spru514d.pdf.
But this option is not available in the compiler settings. I tried to put it in "by hand", but then the compiler returned an error that this option is not valid.

We use CCS 3.3.82.13, CGT 5.2.3, with the DSP 2812. Is this optimization level not available in this combination?

Thanks and Regards, 
Daniel