Why does a new empty F4 project with USB-Device_Lib not build?
Hi
There is a bug. A header file created by CubeMX has wrongly capitalization.
/Middlewares/ST/STM32_USB_Device_Library/Class/CDC/Inc/USBD_CDC.h
Copy the file to one with lower case name.
If not referred to, the files in Middelware gets not compiled, at least not linked.
Dieter