Source: gmsh Followup-For: Bug #1095345 Hi Santiago, thanks for the report.
I hopefully fixed this in 4.13.1+ds1-5, although I am not fully convinced that it is the right approach. >From >https://gitlab.onelab.info/gmsh/gmsh/-/commit/08c1d41ba72c6506aa72b95c868cc40b5e0b4cd0 and from the logic in CMakeLists.txt it seems to me that upstream thinks of Eigen and Blas/Lapack as being mutually exclusive, although I don't understand why the two can't coexist. However, the linker error clearly shows that somewhere in our build Blas is required and linked against. The patch at https://salsa.debian.org/science-team/gmsh/-/commit/fd17211b9a0e8644112ed1279eddc78983949887 and the compile option -DENABLE_BLAS_LAPACK ensure that Blas/Lapack libraries are now linked against. With these changes build and tests are successful on my amd64 system. Francesco
