File eigen3_libinstalldir.patch of Package eigen3

diff -rupN --no-dereference eigen-5.0.1/blas/CMakeLists.txt eigen-5.0.1-new/blas/CMakeLists.txt
--- eigen-5.0.1/blas/CMakeLists.txt	2025-11-08 21:44:56.000000000 +0100
+++ eigen-5.0.1-new/blas/CMakeLists.txt	2025-11-09 21:19:36.926722101 +0100
@@ -33,8 +33,8 @@ foreach(target IN LISTS EIGEN_BLAS_TARGE
   add_dependencies(blas ${target})
   install(TARGETS ${target}
           RUNTIME DESTINATION bin
-          LIBRARY DESTINATION lib
-          ARCHIVE DESTINATION lib)
+          LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+          ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
 endforeach()
 
 if(EIGEN_BUILD_TESTING)
diff -rupN --no-dereference eigen-5.0.1/lapack/CMakeLists.txt eigen-5.0.1-new/lapack/CMakeLists.txt
--- eigen-5.0.1/lapack/CMakeLists.txt	2025-11-08 21:44:56.000000000 +0100
+++ eigen-5.0.1-new/lapack/CMakeLists.txt	2025-11-09 21:19:36.926994409 +0100
@@ -122,8 +122,8 @@ foreach(target IN LISTS EIGEN_LAPACK_TAR
   add_dependencies(lapack ${target})
   install(TARGETS ${target}
           RUNTIME DESTINATION bin
-          LIBRARY DESTINATION lib
-          ARCHIVE DESTINATION lib)
+          LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+          ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
 endforeach()