cross module optimization

hello i am using different platform to build keil environment project and i want to enable cross module optimization. i am using following keywords to enable linker options. add option { ...
cross module optimization

hello i am using different platform to build keil environment project and i want to enable cross module optimization. i am using following keywords to enable linker options. add option { ...
How to apply "[Target]->[cross-module optimization]" to "*.lib"

I would like to delete no-reference methods on "*.lib" because optimizing ROM size. I tried to apply "[Target]->[cross-module optimization]" as true. But no-reference methods were not deleted. Why...
How to apply "[Target]->[cross-module optimization]" to "*.lib"

I would like to delete no-reference methods on "*.lib" because optimizing ROM size. I tried to apply "[Target]->[cross-module optimization]" as true. But no-reference methods were not deleted. Why...
Cross module optimzation

I want to know abt this feature. my code without this - run in 360ms & 7826 bytes with this - run in 470ms & 7286 bytes