cmake - find dependencies from exported config file

cmake/IfcOpenShellConfig.cmake.in

@@ -4,7 +4,42 @@
 set(IFCOPENSHELL_SCHEMA_VERSIONS @SCHEMA_VERSIONS@)
 
 set(IFCOPENSHELL_WITH_OPENCASCADE @WITH_OPENCASCADE@)
+set(IFCOPENSHELL_WITH_CGAL @WITH_CGAL@)
+set(IFCOPENSHELL_IFCXML @IFCXML_SUPPORT@)
+set(IFCOPENSHELL_WITH_ROCKSDB @WITH_ROCKSDB@)
 
+include(CMakeFindDependencyMacro)
+
+set(Boost_USE_STATIC_LIBS ON)
+set(Boost_USE_STATIC_RUNTIME OFF)
+set(Boost_USE_MULTITHREADED ON)
+set(Boost_COMPONENTS system program_options regex thread date_time iostreams)
+find_dependency(Boost CONFIG COMPONENTS ${Boost_COMPONENTS})
+find_dependency(Eigen3 CONFIG)
+
+if(IFCOPENSHELL_WITH_ROCKSDB)
+    find_dependency(zstd CONFIG)
+    find_dependency(RocksDB CONFIG)
+endif()
+
+if(IFCOPENSHELL_IFCXML)
+    find_dependency(LibXml2 CONFIG)
+endif()
+
+
+if(IFCOPENSHELL_WITH_CGAL)
+    find_dependency(CGAL CONFIG)
+endif()
+
+if(IFCOPENSHELL_WITH_OPENCASCADE)
+    find_dependency(OpenCASCADE CONFIG)
+    if(OpenCASCADE_VERSION VERSION_LESS "7.7.0")
+        # cmake configs < 7.7.0 were not adding include directories to targets automatically.
+        set_target_properties(TKernel PROPERTIES
+            INTERFACE_INCLUDE_DIRECTORIES "${OpenCASCADE_INCLUDE_DIR}"
+        )
+    endif()
+endif()
 
 include("${CMAKE_CURRENT_LIST_DIR}/@CONFIG_TARGETS_FILENAME@")