topic Re: how can i set the optimization level for a file? in Kinetis Design Studio

how can i set the optimization level for a file?

matherinewang — Sun, 04 Jan 2015 08:07:41 GMT

Hi all,

In the KDS, i can set the project optimization level as -O0 -O1 -O2 or - O3.

But i want to modify the optimization level for one file in this project, i right click the file, select properties->c/c++ build->setting, but no optimization level here.

How an i set the optimization for a file, is it already support in KDS?

Re: how can i set the optimization level for a file?

BlackNight — Sun, 04 Jan 2015 09:07:54 GMT

Hi Matherine,

use the 'other compiler flags':

Erich

Re: how can i set the optimization level for a file?

matherinewang — Mon, 05 Jan 2015 04:19:41 GMT

Thanks Erich, It works for me.

Re: how can i set the optimization level for a file?

tharonhall — Thu, 08 Jan 2015 19:44:58 GMT

I have used the following #pragma using GCC ARM in Atmel Studio and I am hoping to re-use the technique with my KDS development:

//------------------------------------------------------------------------

//------ Set optimization level for this module ------------------------

//------ Overrides global settings -------------------------------------

//------------------------------------------------------------------------

//Values are 0 for no optimization, to 3 for most. "s" is for size

#pragma GCC optimize ("Os")

There is more than one way to express this to GCC, but this is the form I have been using successfully for some time now.

BTW - I am looking for feedback as to the difference between the "Cross ARM Compiler" in KDS and the "GNU ARM Compiler" - Difference between the "Cross ARM C++ Compiler" and the "GNU ARM C++ Compiler"?