Development tools for Zephyr on STM32Workbench for Zephyr: VS Code extension to set up, build, flash and debug Zephyr applications on STM32.Devicetree manager: browse, edit and visualize Zephyr devicetree, STM32CubeMX-like for Zephyr.
As i was written in my last post, that was a problem with newlib. I was using arm-none-eabi 4.9 and installing 5.2 solved the problem.
I use eclipse and may be it is easyer with SW4STM32.