Travis build fails because protobuf headers are not found. StackOverflow reports that the following step solves the issue:
sudo apt-get install libprotobuf-dev protobuf-compiler
However that does not appear to solve the issue in this case (see .travis.yml)
See build: https://travis-ci.org/GeoDaCenter/spatial_access/builds/457749357
Travis build fails because protobuf headers are not found. StackOverflow reports that the following step solves the issue:
sudo apt-get install libprotobuf-dev protobuf-compiler
However that does not appear to solve the issue in this case (see .travis.yml)