a2475509e57813ea6dccea659fe2daa82e8f1372
Turns out Apple in its infinite wisdom installs clang as /usr/bin/g++, so guessing based on executable name doesn't work.
Please see the Ardour web site at http://ardour.org/ for all documentation..
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http://ardour.org/development.html
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56.5%
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39.6%
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0.6%
Other
0.9%