Squashed 'site_scons/' changes from 84658cc..2aad345

2aad345 Add start of output interpretation for clang

git-subtree-dir: site_scons
git-subtree-split: 2aad3454078d679b6c9da3dfdf2162cf1c56cbf3
Merge commit '4c326296ba402000e08d63965eb089c49ab71436'