Errors running ./build

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4

I just came across that exact same issue just a few days ago. Grabbing a fresh version of Eigen fixed it for me. Make sure you don’t use their current master branch, grab the latest release snapshot - otherwise you’ll get other types of errors (I’ll have to look into that when I have a minute, I’m hoping it’s a temporary glitch in Eigen’s development branch).

In more detail:

  1. download the latest release version of Eigen

  2. put the file in your MRtrix3 folder

  3. extract it in place:

      $ tar xvzf eigen-eigen-*.tar.gz

  4. run configure with the right flags to tell it where to find your local Eigen installation:

     $ EIGEN_CFLAGS="-isystem \"$(pwd)/eigen-eigen-07105f7124f9\"" ./configure

    Note that you may need to amend the location for Eigen, although the line above should work as-is…

  5. assuming that step works, try building again:

     $ ./build
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