math/ggobi does not build, if graphics/graphviz installed

Rainer Hurling rhurlin at
Tue Apr 23 16:38:14 UTC 2013

Dear developers,

I am the maintainer of math/ggobi and I could need some help for a
longstanding problem with the build of ggobi (not seen by tinderbox):

With graphics/graphviz installed, math/ggobi finds this external
installation by its configure script in plugins/GraphLayout. Then it
tries to use it instead of its internal graphviz version and fails when
trying to build the port.

The diff between graphics/graphviz/Makefile with/without external
graphviz found is like this (the first version does not build):

< LIBGVC_CFLAGS = -I/usr/local/include/graphviz
< LIBGVC_LIBS = -L/usr/local/lib/graphviz -lgvc -lgraph -lcdt

I am looking for either an elegant way to forbid this configure script
to use the external graphviz or to use the external graphviz correctly,
when installed.

If this would be possible, an option in the ports Makefile could switch
between them (and install external graphviz, if wanted).

Could someone with more experience be so kind to push me in the right
direction, please.

Many thanks in advance,
Rainer Hurling

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