Configure fails to find mfem submodule, and otherwise the build fails with the mfem-4.8 package

[yurivict]

With the git submodule configure error is:

-- Could NOT find MFEM (missing: MFEM_DIR)
CMake Error at cmake/thirdparty/FindMFEM.cmake:68 (message):
  Failed to find any MFEM build configuration files in
  /usr/ports/science/serac/work/smith-ad49974/mfem
Call Stack (most recent call first):
  cmake/thirdparty/SetupSeracThirdParty.cmake:200 (include)
  CMakeLists.txt:172 (include)

The build with the mfem-4.8 package fails like this:

In file included from /usr/ports/science/serac/work/smith-ad49974/src/serac/physics/state/finite_element_vector.cpp:7:
In file included from /usr/ports/science/serac/work/smith-ad49974/src/serac/infrastructure/../../serac/physics/state/finite_element_vector.hpp:26:
In file included from /usr/ports/science/serac/work/smith-ad49974/src/serac/infrastructure/../../serac/numerics/functional/functional.hpp:28:
In file included from /usr/ports/science/serac/work/smith-ad49974/src/serac/infrastructure/../../serac/numerics/functional/tensor.hpp:2112:
/usr/ports/science/serac/work/smith-ad49974/src/serac/infrastructure/../../serac/numerics/functional/tuple_tensor_dual_functions.hpp:742:31: error: expected ';' after expression
  742 |   mfem::DenseMatrixEigensystem eig_sys(matA);
      |                               ^
      |                               ;
/usr/ports/science/serac/work/smith-ad49974/src/serac/infrastructure/../../serac/numerics/functional/tuple_tensor_dual_functions.hpp:742:9: error: no member named 'DenseMatrixEigensystem' in namespace 'mfem'
  742 |   mfem::DenseMatrixEigensystem eig_sys(matA);
      |   ~~~~~~^
/usr/ports/science/serac/work/smith-ad49974/src/serac/infrastructure/../../serac/numerics/functional/tuple_tensor_dual_functions.hpp:742:32: error: use of undeclared identifier 'eig_sys'
  742 |   mfem::DenseMatrixEigensystem eig_sys(matA);
      |                                ^
/usr/ports/science/serac/work/smith-ad49974/src/serac/infrastructure/../../serac/numerics/functional/tuple_tensor_dual_functions.hpp:743:3: error: use of undeclared identifier 'eig_sys'
  743 |   eig_sys.Eval();
      |   ^
/usr/ports/science/serac/work/smith-ad49974/src/serac/infrastructure/../../serac/numerics/functional/tuple_tensor_dual_functions.hpp:749:17: error: use of undeclared identifier 'eig_sys'
  749 |     output[k] = eig_sys.Eigenvalue(k);
      |                 ^
/usr/ports/science/serac/work/smith-ad49974/src/serac/infrastructure/../../serac/numerics/functional/tuple_tensor_dual_functions.hpp:753:72: error: use of undeclared identifier 'eig_sys'
  753 |       tensor<double, size> phi = make_tensor<size>([&](int i) { return eig_sys.Eigenvector(k)[i]; });
      |                                                                        ^
6 errors generated.

rev.ad49974
OS: FreeBSD 15 STABLE
clang-19

[chapman39]

have you tried git submodule update --init --recursive?