Enabling Compiler optimization settings Oz and Os

[Ubaid_M]

Hello,

I am using nCS for my application

In vscode I found compiler optimization settings under guiconfig, I just wanted to understand is there any other way for me to enable Oz and Os compiler optimization for build size..?

Thanks,

[wallyb]

not sure if nCS uses prj.conf files, but if so, try putting:

CONFIG_COMPILER_OPT="-Oz"

or 

CONFIG_COMPILER_OPT="-Os"

in your prj.conf file and do a pristine build.

[Priyanka]

Hi,

When creating or editing a build configuration add the following to Extra CMake arguments:

-DCMAKE_C_FLAGS="-Os" .

Or any other C compiler flag you desire. 

In case you compile C++ code use -DCMAKE_CXX_FLAGS.

-Priyanka