eigen3 issue for Ubuntu12.04 about codyco-modules HOT 6 CLOSED

So far we tried just to uninstall completely the apt-get version of Eigen and to install the version from source. However your solution should work, I will check what's wrong with the FindEigen cmake file.

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While I check for a solution, a workaround is to manually set EIGEN3_INCLUDE_DIR to $ICUB_INSTALL_PREFIX/include/eigen3 in the ccmake interface.

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To solve the issue, I copied eigen 3.2 files over the 3.0.5 in /usr/include/eigen3
It works, but it is not a clean operation.

For future versions, it should be possible to set the eigen path from the cmake..

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The workaround for the EIGEN3_INCLUDE_DIR does not work on my machine - I also put it in the bashrc

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Probably the is some issue with some module-specific FindEigen.cmake . I guess uninstalling the libeigen3-dev was not an option for you?

However, we are currently migrating the repository to a new build infrastructure that will permit every library/module to have its own github repo, based on https://github.com/robotology/YCM .

Considering that you used a workaround I guess it will be ok if we fix this issue just on the new build system? I hope to have it in place in the next few days.

By the way, there are still a lot of Ubuntu 12.04 installations at Darmstadt? If we have to support Ubuntu 12.04 perhaps the cleanest solution is to prepare a backport of Eigen 3.2 on Ubuntu 12.04 .

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This bug was fixed upstream by this PR : https://bitbucket.org/eigen/eigen/pull-request/76/findeigen3cmake-add-reading-hints-of-eigen (more info: robotology/ycm#70 ).

Now FindEigen3.cmake will check the EIGEN3_ROOT and EIGEN3_ROOT_DIR environment variables when searching for eigen headers.

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