today I updated my Arduino IDE from 1.5.6 to 1.5.7 using the download from arduino.cc. I tried to compile some samplecode from github called WiFlyHQ. While compiling I got the following errormessage:
/opt/arduino/hardware/tools/avr/bin/avr-ar: wiring_digital.c.o: file or folder not found
I get the problem in WiFlyHQ.cpp. I didn't change anything. It compiles without any problems under 1.5.6. So it has to be a problem with the current version.
I'm using Ubuntu 32bit and Arduino IDE 1.5.7 32bit.
Close ALL copies of the IDE. Then try again. If that does not do Close all copies of the IDE reinstall the IDE and try again. But you must ensure that you close all copies of the IDE.
Mark
PS as the file referred to has a .o so this is a problem between the linker and the compile and has nothing to do with the source code.
I installed the IDE again and I got a different behavior. The error with the wiring disappears and only the error appear. I took a screenshot with 1.5.6 and 1.5.7.