Look for boost headers for OpenVDBs older than 12

Signed-off-by: Alex Fuller <[email protected]>

Author: boberfly

src/cmake/externalpackages.cmake

@@ -182,6 +182,10 @@ checked_find_package (OpenVDB
                       VERSION_MIN  9.0
                       DEPS         TBB
                       DEFINITIONS  USE_OPENVDB=1)
+# Note: OpenVDB older than 12 needs Boost headers.
+if (OpenVDB_FOUND AND OpenVDB_VERSION LESS 12)
+    checked_find_package (Boost)
+endif()
 
 checked_find_package (Ptex PREFER_CONFIG)
 if (NOT Ptex_FOUND OR NOT Ptex_VERSION)

src/openvdb.imageio/CMakeLists.txt

@@ -4,7 +4,9 @@
 
 if (OpenVDB_FOUND)
     add_oiio_plugin (openvdbinput.cpp
-                     INCLUDE_DIRS  ${OPENVDB_INCLUDES} ${TBB_INCLUDE_DIRS}
+                     INCLUDE_DIRS  ${OPENVDB_INCLUDES}
+                                   ${TBB_INCLUDE_DIRS}
+                                   ${Boost_INCLUDE_DIRS}
                      LINK_LIBRARIES  ${OPENVDB_LIBRARIES}
                                      $<TARGET_NAME_IF_EXISTS:TBB::tbb>)
 endif()