Added Eigen version check. We now require Eigen 3.3

.gitignore

@@ -31,5 +31,5 @@ src/examples/map_apriltag_save.yaml
 
 \.vscode/
 build_release/
-
+.clangd
 wolf.found

cmake_modules/wolfConfig.cmake

@@ -91,6 +91,9 @@ list(APPEND wolf_LIBRARIES ${YAMLCPP_LIBRARY})
 if(NOT Eigen3_FOUND)
   FIND_PACKAGE(Eigen3 REQUIRED)
 endif()
+if(${EIGEN3_VERSION_STRING} VERSION_LESS 3.3)
+  message(FATAL_ERROR "Found Eigen ${EIGEN3_VERSION_MAJOR}.${EIGEN3_VERSION_MINOR}. The minimum version required is Eigen 3.3")
+endif()
 list(APPEND wolf_INCLUDE_DIRS ${EIGEN3_INCLUDE_DIRS})
 
 SET(CMAKE_MODULE_PATH ${BACKUP_MODULE_PATH})