I'm trying to build OpenCV3, as part of a dependency for the [diagnostics](http://wiki.ros.org/diagnostics) ROS Kinetic. My build steps are:
rosinstall_generator diagnostics --rosdistro kinetic --deps | wstool merge -t src -
wstool update -t src -j2 --delete-changed-uris
rosdep install --from-paths src --ignore-src --rosdistro kinetic -y -r --os=debian:jessie
./src/catkin/bin/catkin_make_isolated --install -DCMAKE_BUILD_TYPE=Release --install-space /opt/ros/kinetic -j1
The last command builds several packages, but fails on OpenCV3 with the error:
==> Processing plain cmake package: 'opencv3'
==> Building with env: '/opt/ros/kinetic/env.sh'
Makefile exists, skipping explicit cmake invocation...
==> make cmake_check_build_system in '/home/pi/ros_catkin_ws/build_isolated/opencv3/install'
==> ninja -j1 in '/home/pi/ros_catkin_ws/build_isolated/opencv3/install'
ninja: error: loading 'build.ninja': No such file or directory<== Failed to process package 'opencv3':
Command '['/opt/ros/kinetic/env.sh', 'ninja', '-j1']' returned non-zero exit status 1
Reproduce this error by running:
==> cd /home/pi/ros_catkin_ws/build_isolated/opencv3 && /opt/ros/kinetic/env.sh ninja -j1
What's causing this error? Why doesn't OpenCV3 include a Ninja build file? I've asked about this on the [corresponding ROS answers site](http://answers.ros.org/question/244214/unable-to-install-because-of-missing-ninja/), but they have no idea what's causing this.
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