eigen2: fix build failure with cmake 4

- CMake 4 is no longer retro compatible with versions < 3.5
- CMake Error at doc/snippets/CMakeLists.txt:17 (GET_TARGET_PROPERTY):
  The LOCATION property may not be read from target "compile_class_LU".  Use
  the target name directly with add_custom_command, or use the generator
  expression $<TARGET_FILE>, as appropriate.
- CMake Error at doc/examples/CMakeLists.txt:11 (GET_TARGET_PROPERTY):
  The LOCATION property may not be read from target
  "Tutorial_simple_example_dynamic_size".  Use the target name directly with
  add_custom_command, or use the generator expression $<TARGET_FILE>, as
  appropriate.

0 files changed, 0 insertions, 0 deletions