I am trying to use the GitHub workflow to build my bug fix into a Windows executable, but the build keeps failing on not finding the Eigen library CMake files. I am using a tip i found by googling to check Eigen3 out of its repo on GitLab using this in the workflow YAML file `- name: checkout Eigen using shell`\ ` run: |`\ ` git config --global url.https://github.com/.insteadOf git://github.com/`\ ` git clone https://gitlab.com/libeigen/eigen.git` but the build is not finding Eigen’s CMake files .. this is all in my own branch using the workflow for cmake-single-platform I have been comparing my YAML to the windows.yml that is building OpenSCAD for Windows in the Master scad and i do not see any reference to Eigen 3 .. and it is not a submodule so .. how does Eigen get into the build?

The key part of windows.yml is: ./scripts/msys2-install-dependencies.sh This installs all dependencies, including eigen3. For the time being, Windows-native development is only feasible in an MSYS2 environment, so make sure that’s what you’re using. -Marius

I just encountered the same issue. The issue seems to be that msys2 updated Eigen3 from version 3.4.0 to 5.0.0 a day or so ago, and our build system isn’t able to look for both V3 and V5. I’m looking into it.. -Marius > On Sep 20, 2025, at 17:48, vulcan_--- via Discuss <discuss@lists.openscad.org> wrote: > > I am trying to use the GitHub workflow to build my bug fix into a Windows executable, but the build keeps failing on not finding the Eigen library CMake files. > > I am using a tip i found by googling to check Eigen3 out of its repo on GitLab using this in the workflow YAML file > > - name: checkout Eigen using shell > run: | > git config --global url.https://github.com/.insteadOf git://github.com/ > git clone https://gitlab.com/libeigen/eigen.git > > but the build is not finding Eigen’s CMake files .. this is all in my own branch using the workflow for > > cmake-single-platform > > I have been comparing my YAML to the windows.yml that is building OpenSCAD for Windows in the Master scad and i do not see any reference to Eigen 3 .. and it is not a submodule so .. how does Eigen get into the build? > > > > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org