topic undefined reference to `__sync_add_and_fetch_4' in Kinetis Microcontrollers

undefined reference to `__sync_add_and_fetch_4'

paulyang — Wed, 23 Jul 2014 07:24:42 GMT

I am working on MKL26Z128VLH4 with CW 10.6.

However, I got the following error in linker

undefined reference to `__sync_add_and_fetch_4'

undefined reference to `__sync_val_compare_and_swap_4'

Does gcc provide these functions?

Re: undefined reference to `__sync_add_and_fetch_4'

Paul_Tian — Thu, 24 Jul 2014 07:22:03 GMT

Hi, Paul

Would you please upload your project? I would like to check it for you.

Best Regards

Paul

Re: Re: undefined reference to `__sync_add_and_fetch_4'

paulyang — Thu, 24 Jul 2014 08:04:34 GMT

I have attached a test project.

It calls __sync_add_and_fetch() in main.c. This function is provided by gcc.

Re: undefined reference to `__sync_add_and_fetch_4'

Jorge_Gonzalez — Fri, 09 Jan 2015 01:56:28 GMT

Hello Paul Yang:

I guess you could not resolve the issue. Sorry about that.

:smileyinfo: Just for reference for anyone interested, those are “built-in” functions provided by GCC. However CodeWarrior comes with a customized version of GCC developed by FSL + ARM and since those are processor specific functions then I think they are not available for Cortex-M processors.

Regards!

Jorge Gonzalez