Delete comment from: Ken Shirriff's blog
You have duplicate CPP files in the directories. The Arduino IDE does not use a MAKE, rather it compiles all cpp and ino files in the working and library directories. Some version controls (GIT) will make file.bak.cpp and leave them. this will interfere with the real file.cpp as they both have the same instances.
Jan 14, 2013, 9:33:46 AM
Posted to A Multi-Protocol Infrared Remote Library for the Arduino