We deployed homcc to some other machines than our dev-machines for testing and one issue occurred on some of them:
In the Saola Wiki (https://wiki.saola.cloud/guides/tips-and-tricks.html), we describe adding following to the .bashrc:

if [ -d "/usr/lib/ccache" ]; then
  PATH="/usr/lib/ccache:$PATH"
  if [ -d "/usr/lib/distcc" ]; then
    export CCACHE_PREFIX="distcc"
  fi
fi

Some team members have this in place, while some others don't. (Simon and me did not add this to our .bashrc)
Due to this change of PATH, the homcc call to the compiler to get the target architecture fails somehow.
We address this issue by changing the call to the compiler to an absolute one instead of using a normalized call. This resolves the issue, even if the previous snippet was added to the .bashrc.