Hello,

This is the first time I am trying to release a package through ROS
infrastructure. The local Debian build succeeds, but  the online build
keeps failing when trying to `ar` a group of object files for creating a
static library. The error message is:

make[10]: /usr/lib/ccache/ar: Command not found

For example here:
http://jenkins.ros.org/job/ros-hydro-ardrone-autonomy_binarydeb_precise_amd64/lastFailedBuild/console

Looking into the [full] console output, I can see that the PATH is being
set as "/usr/lib/ccache:/usr/sbin:/usr/bin:/sbin:/bin" before running
`dpkg-buildpackage`. Does the error message imply that `ar` is not
installed at all on the build server (Usually `ar` is in /usr/bin which is
in the PATH)?

Best,
Mani