Application size increased through SES

[Mehdi]

Hello,

Following to this ticket, I started with an existing Segger embedded studio project from the SDK to port my project from Keil to SES 5.62 .

Now, the project works well with SES, but I see that the application size in the flash has become greater (from 56411 bytes through Keil to 83991 bytes through SES).

Knowing that the optimization level is set to 0 on both projects, what is the reason that allows this behavior.

Regards,

Mehdi.

[Håkon Alseth]

Hi Mehdi,

 

Different compilers behave differently, especially with no optimization.

You can see some comparison in this blog post:

https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/comparing-compilersides-for-development-with-nrf5x

 

That being said, could you also check that the sdk_config.h is equal on both sides?

 

Kind regards,

Håkon

[Mehdi]

Hi Hakon,

I would first thank you for your quick reply.

Is it allowed to change some sections like "load" and "keep"  options to "No"  or switch to segger compiler to reduce application memory size in the flash ?

if yes, is there any impacts in the device behaviour ?

Best regards,

Mehdi.

[Håkon Alseth]

Hi,

 

Mehdi said:

Is it allowed to change some sections like "load" and "keep"  options to "No"  or switch to segger compiler to reduce application memory size in the flash ?

You are free to change your project as you'd like. I would recommend that you change the compiler optimization to size optimization. Changing the linker scripts will not help you much, as you need those sections.

Mehdi said:

if yes, is there any impacts in the device behaviour ?

This will affect the runtime behavior as well as resource usage (flash and RAM).

 

Kind regards,

Håkon

[Mehdi]

Hi Hakan,

Thank you for your quick reply.

I see that through SES, it's possible de change the compiler from GCC to Clang or segger, is the SDK supports Clang or segger compiler? 

Best Regards,

Mehdi.

[Håkon Alseth]

Hi Mehdi,

 

Mehdi said:

I see that through SES, it's possible de change the compiler from GCC to Clang or segger, is the SDK supports Clang or segger compiler? 

We support GCC compiler within SES.

Unfortunately, we do not support llvm/clang in the nRF5 SDK.

 

Kind regards,

Håkon