I am pleased to report that both CsoundVST and the vst4cs opcodes
build and run without problems on Linux (Ubuntu 16.04 with Csound
develop head and gcc 5.4.0). I have tested the vst4cs opcodes with the
Pianoteq 6 VST plugin, which is available on Linux for license
holders.

I had to fix a couple of minor bugs in the Csound build system to get
this to work, so be sure to do a fresh pull if you want to try this.

Now that the Windows installer is building on AppVeyor and Csound
seems to be running fine from the AppVeyor-built installer, I am
planning to quit using Windows, and from now on to use exclusively
Linux.

Regards,
Mike

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Michael Gogins
Irreducible Productions
http://michaelgogins.tumblr.com