Protect jsoncpp against multiple find_package() calls

tesseract-robotics / trajopt

Trajectory Optimization Motion Planner for ROS

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Protect jsoncpp against multiple find_package() calls #288

Closed johnwason closed 2 years ago

johnwason commented 2 years ago

There is a bug in newer jsoncpp versions that raises an error if find_package(jsoncpp) is called more than once. This PR fences the calls to check if the offending target already exists.

See https://github.com/open-source-parsers/jsoncpp/issues/1356