It appears to me that devpkg-eigen has nothing to do with the Eigen3 C++ package. I downloaded it, tried a test program, and obtained a fatal error for trying to include Eigen/Dense. Neither “find” nor “which” produce an “eigen” or an “Eigen” after downloading devpkg-eigen. I have not found clues to a package for Eigen3. The swupd package search facility refers me to devpkg-eigen, but I now am skeptical.
Any problem with installing the Eigen3 package directly?
The bundle you’ve downloaded is for https://bitbucket.org/eigen/eigen/get/3.3.7.tar.bz2 and includes Eigen/Dense in its headers.
which isn’t going to find eigen as it contains no binaries to find as it’s headers and templates. The eigen files should be installed to /usr/include/eigen3
Depending on what directory you ran find in (and whether you specified a directory to search), it will only search from your current path. Opening up a terminal and typing find eigen will only search your home directory for it (and won’t find it). find / eigen should find it though.
One problem I see with devpkg-eigen is that it doesn’t include the development packages for openblas, suitesparse etc which the header files may refer to and hence be unable to import them. I suggest you include the full error seen so we can tell if this is the case.
Here is the “find” output from /
find -name eigen
./home/bob/Documents/PYTHON_STUFF/CLIBURN/sta-663-2019/notebook/eigen
./usr/lib/python3.8/site-packages/scipy/sparse/linalg/eigen
./usr/lib64/R/library/BH/include/boost/numeric/odeint/external/eigen
./usr/lib64/R/library/BH/include/boost/compute/interop/eigen
./usr/lib64/R/library/RInside/examples/eigen
./usr/share/package-licenses/eigen
./usr/include/boost/numeric/odeint/external/eigen
./usr/include/boost/compute/interop/eigen
find: ‘./run/user/1000/gvfs’: Permission denied
A confession here. I probably should have run "find" as su.
eigen3 indeed is in /usr/include, and compilation works when that
path is specified. Searching on
eigen3 produces results:
find -name eigen3
./home/bob/Documents/PYTHON_STUFF/CLIBURN/sta-663-2019/notebook/eigen/bench/btl/libs/eigen3
./home/bob/Documents/PYTHON_STUFF/CLIBURN/sta-663-2019/notebook/eigen/.hg/store/data/bench/btl/libs/eigen3
./home/bob/Documents/PYTHON_STUFF/CLIBURN/sta-663-2018/notebooks/eigen3
./home/bob/Documents/PYTHON_STUFF/CLIBURN/sta-663-2018/notebooks/eigen3/bench/btl/libs/eigen3
./usr/lib/python3.8/site-packages/tensorflow_core/include/third_party/eigen3
./usr/share/eigen3
./usr/include/eigen3 <---------------
If I may, your comment about the development packages for openblas,
suitesparse, etc. raises one issue for me. I have been given to
understand that the libraries in the bundles are not siloed in their
bundles, but are shared.
I appreciate your having helped me get my head around this.
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