Does libcxxabi makes sense under linux? What are the benefits?

You should not use libcxxabi directly. To my understanding it is a kind of platform abstraction library, providing low level functions needed to implement libcxx. If you are asking about using libcxx or libstdc++, the differences are mostly the license, newer standard version completeness (the clang project seems slightly faster in implementing recent C++ revisions) …

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xvfb-run on OS X

X11 is no longer included with OS X: https://support.apple.com/en-us/HT201341 X11 server and client libraries for OS X are available from the XQuartz project: http://xquartz.macosforge.org/ I’m not sure if it includes all the other X goodies like Xvfb. In that case you could compile it yourself; with these options: –disable-xquartz –enable-xvfb –enable-xnest –enable-kdrive More info here: …

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