undefined __errno build problem

[Cseb84]

Hi,
When i try to build my stm32 project, i get the error below:

"In function `sqrtf': wf_sqrt.c.text.sqrtf+0x80): undefined reference to `__errno' "

How can i fix this error?

[embitz]

I just tried it here without any problems.

My guess is that you don't use the right libraries. Are you using Newlib Nano branch?