I'm trying to build OnStep with Visual Micro. The IDE and the board seems to be configured properly. But when F5 is pressed, I always get the following error:
Compiling debug version of 'OnStep' for 'Generic STM32F3 series'
Error compiling variant
Debug build failed for project 'OnStep'
arm-none-eabi-gcc*: error: C:\Users\Administrator\AppData\Local\Temp\VMBuilds\OnStep\STM32_GenF3\Debug\build_opt.h: No such file or directory
