C project in SWB4STM builds, but does not run on L476RG
I have the exact same problem wrt just getting "something" to run.
Check your "C/C++ build/Environment" etc in Eclipse. There must be PATH variables and settings there.
See if it looks right.
"Error: libusb_open() failed with LIBUSB_ERROR_NOT_SUPPORTED"
I am worried about this line. Do you have the latest STlink and drivers installed?