PX4Firmware error (px4_defines.h)

Getting a compilation error with something in the PX4Firmware (with make px4-v2). Linux build with Ubunto 14.04.

make[3]: *** No rule to make target /home/me/PX4Firmware/src/platforms/px4_defines.h', needed byadc.c.o’. Stop.

I have all the repos (ardupilot, PX4Firmware, PX4NuttX, uavcan) and all are one their ArduCopter-3.2 branch if they have one.

Installed this on another computer (Centos 6) about six months ago an don’t remember this particular problem.

‘make px4-clean’ sorted this out.