Configuration variables cannot be set/overridden by target specific variable values about lufa

[abcminiuser]

The TARGET variable likely is an unfortunate naming choice. It's used throughout the DMBS makefile build system so changing it both there and here is possible, but may cause issues for existing DMBS users (if there actually are any!).

The DMBS project uses TARGET to specify what the output artifacts will be named (the generated HEX, EEP and other files) and I usually also assume in the LUFA project makefiles that TARGET is also the name of the main source file. You're free to rename the main sources if needed however and just use the TARGET variable to name the output binaries; just change the $(TARGET).c in SRC to the actual name of your main source file.

Make supports default variable values, so you can use VARIABLE ?= default_value to set a default variable value if it is not already set.