ggobi @2.1.8_1 Build failure

[rbubley]

ggobi fails to build one of its optional components, the graphviz plugin. A post at ​https://groups.google.com/forum/#!topic/ggobi/5I61syMDPHE suggests that this is because the graphviz API changed between graphviz 2.28 and 2.30, and there doesn't seem to be an upstream fix.

A work-around would be to change the ggobi portfile to exclude the graphviz plugin: i.e. change a line in the portfile to

configure.args --with-dataviewer --with-describedisplay --with-ggvis --with-graphaction --with-varcloud