Draft: Fix MKL OpenMP linking issues.
- Prevent OpenMP linking when
OGS_USE_MKL=ON -
EIGEN_USE_MKL_ALLis now set per default via (OGS_EIGEN_USE_MKL) when MKL is on, https://eigen.tuxfamily.org/dox/TopicUsingIntelMKL.html
@joergbuchwald Can you please check if this fixes your linking issues?
Fixes #3296 (closed).
Edited by Lars Bilke