Installation conflict with Eigen3.4

[ahilderley]

Hi there,
Curious to know if there's been a fix for the issue below. I'm running into the same installation issue.
https://community.mrtrix.org/t/installation-error-of-mrtrix3tissue/5233

Big thanks!
Alicia

[gdevenyi]

Eigen is a header-only library, as such, all you need to do to provide a version which mrtrix3tissue supports by downloading this, https://gitlab.com/libeigen/eigen/-/archive/3.3.9/eigen-3.3.9.tar.bz2, unpacking it, and then pointing the configure script properly:
EIGEN_CFLAGS="-isystem /path/to/the/unpacked/eign-3.3.9" ./configure

[Planetdtudy]

Worked! Thanks.