USB related warnings on SAM / Due

[matthijskooijman]

I'm preparing a pullrequest to fix various warnings in both the AVR and SAM cores. However, there are few warnings in SAM that I'm not sure how to fix, since I'm not very familiar with that code. In case anyone has suggestions, here's the warnings:

sam/cores/arduino/USB/HID.cpp:148: warning: unused parameter 'i'
sam/cores/arduino/USB/USBCore.cpp:72: warning: "USB_MANUFACTURER" redefined
<command-line>:0: note: this is the location of the previous definition
sam/cores/arduino/USB/USBCore.cpp:94: warning: missing initializer for member 'DeviceDescriptor::idProduct'
sam/cores/arduino/USB/USBCore.cpp:94: warning: missing initializer for member 'DeviceDescriptor::deviceVersion'
sam/cores/arduino/USB/USBCore.cpp:94: warning: missing initializer for member 'DeviceDescriptor::iManufacturer'
sam/cores/arduino/USB/USBCore.cpp:94: warning: missing initializer for member 'DeviceDescriptor::iProduct'
sam/cores/arduino/USB/USBCore.cpp:94: warning: missing initializer for member 'DeviceDescriptor::iSerialNumber'
sam/cores/arduino/USB/USBCore.cpp:94: warning: missing initializer for member 'DeviceDescriptor::bNumConfigurations'
sam/cores/arduino/USB/USBCore.cpp:122: warning: unused parameter 'ep'
sam/cores/arduino/USB/USBCore.cpp:221: warning: unused parameter 'flags'

Possibly some of these are actual bugs, so I don't want to apply some kludge workaround without actually understanding the code.

[K-I-S-S]

I MAY know what that is, ir should I say "If you fix that", you fix the problem I am having.

I'm using a Due on Linux 64 bit 12.04 LTS from CD. The Due uses ttyACM0.

I kept getting COM1 is unavailable in Linux?

I modified the preferences file and COM1 reappeared.

It was not until I did a ls -s /dev/ttyACM0 /dev/tty/USB0

The problem went away. This suggests a reassignment somewhere. 1.5.2-r2.

[sandeepmistry]

I just tried build a sketch for the Due, and am no longer seeing these warnings.