LLVM optimization level setting has no effect in e2stuio

Question

Hello Dialog 
 
 I downloaded e2studio and successfully built SPS_6.150.8.83 and CODELESS_6.380.20.66 on DA14585 
 
 my questions are: 
 1. Is it possible to reduce the code size? when I try to change the optimization level from None (-O0) to Optimize size (-Oz), the image size still does not change (the default compiler is LLVM) 
 2. when I try to change the compiler to ARM Compiler 6.16, it fails to compile; can you provide the relevant settings that need to be configured? 
 
 Thanks 
 Robin

JimB · Answer

1. Use "-Os" for LLVM to optimize for size 
 2. Compiler / Linker options are not identical between GCC & LLVM, would need to go thru individual build errors to correct. Perhaps someone else has already done this and can comment. Use "-help" on LLVM to dump all build options, similarly for GCC use "--help".

JH_Renesas · Answer

Hi CP, 
 If there is no differences after optimization, we can understand as there is no optimization can do with this SDK. Please referring to the LDS file in the SDK, the data sections are fixed: 
 
 BR, 
 JH_Renesas

JH_Renesas · Answer

Hi CP, 
 There are some services and modules that can exclude from the app. if you do not need them you can turn that to 1 to close them, like below: 
 
 BR, 
 JH_Renesas