Arduino: 1.6.6 (Windows 8.1), Board: "Arduino/Genuino Uno"
WARNING: Spurious .github folder in 'Adafruit NeoPixel' library
avr-g++: error: missing filename after '-o'
exit status 1
Error compiling.
WARNING: Spurious .github folder in 'Adafruit NeoPixel' library
Invalid library found in C:\arduino-1.6.6\libraries\BtSerial: C:\arduino-1.6.6\libraries\BtSerial
WARNING: Spurious .github folder in 'Adafruit NeoPixel' library
Invalid library found in C:\arduino-1.6.6\libraries\BtSerial: C:\arduino-1.6.6\libraries\BtSerial
This report would have more information with
"Show verbose output during compilation"
enabled in File > Preferences.
every time I try to upload a sketch on my arduino uno board this error message appears how can I fix it please ??