cmake - fix issue with using cmake occt packages <7.7.0

cmake/FindOpenCASCADE.cmake

@@ -39,6 +39,13 @@ if(NOT OCC_INCLUDE_DIR AND NOT OCC_LIBRARY_DIR)
     mark_as_advanced(OpenCASCADE_DIR)
     message(STATUS "Found OpenCASCADE config: ${OpenCASCADE_DIR}")
 
+    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()
+
     if(OpenCASCADE_VERSION VERSION_LESS "7.9.0")
         # Bug in OCCT cmake configs < 7.9.0 - missing linked library.
         list(APPEND OpenCASCADE_LIBRARIES WSOCK32.lib)

src/examples/CMakeLists.txt

@@ -65,6 +65,13 @@ if(SCHEMA_VERSIONS MATCHES "2x3")
             find_package(CGAL CONFIG REQUIRED)
             find_package(OpenCASCADE CONFIG REQUIRED)
 
+            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()
+
             target_link_libraries(IfcHouseInterface INTERFACE IfcOpenShell::IfcParse IfcOpenShell::geometry_serializer)
         else()
             target_link_libraries(IfcHouseInterface INTERFACE IfcParse geometry_serializer)