Windows: Fix OpenVDB errors when compiling with clang-cl

Pull Request: https://projects.blender.org/blender/blender/pulls/126236

extern/mantaflow/CMakeLists.txt

@@ -101,6 +101,11 @@ if(WITH_OPENVDB)
     # for details.
     string(APPEND CMAKE_CXX_FLAGS " /wd4251")
   endif()
+
+  # This works around the issue described in #120317 and https://github.com/AcademySoftwareFoundation/openvdb/pull/1786
+  if(MSVC_CLANG)
+    set_source_files_properties(${MANTA_PP}/fileio/iovdb.cpp PROPERTIES COMPILE_FLAGS -fno-delayed-template-parsing)
+  endif()
 endif()
 
 set(SRC

intern/cycles/scene/CMakeLists.txt

@@ -132,6 +132,11 @@ if(WITH_OPENVDB)
   list(APPEND LIB
     ${OPENVDB_LIBRARIES}
   )
+
+  # This works around the issue described in #120317 and https://github.com/AcademySoftwareFoundation/openvdb/pull/1786
+  if(MSVC_CLANG)
+    set_source_files_properties(image_vdb.cpp PROPERTIES COMPILE_FLAGS -fno-delayed-template-parsing)
+  endif()
 endif()
 
 if(WITH_ALEMBIC)