How to make rosmake and distcc work together

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I have setup a cross compiling environment to build ROS for RaspberryPi using distcc. Everything works fine with cmake and I have successfully built parts of ros. However, in the Debian install instructions when you get to Layer2 step 1.5, you issue:

rosmake -a

However, this doesn't call distcc. I have even tried:

CC="distcc arm-unknown-linux-gnueabi-gcc" CXX="distcc arm-unknown-linux-gnueabi-g++" rosmake -a

with no success.

Any suggestions to get distcc and rosmake to work together? Again ... my setup does work fine with just cmake. Issueing:

CC="distcc arm-unknown-linux-gnueabi-gcc" CXX="distcc arm-unknown-linux-gnueabi-g++" cmake .

inside a ros package works fine.

Thanks.