patch-openvdb_openvdb_CMakeLists.txt

--- openvdb/openvdb/CMakeLists.txt.orig	2021-06-11 21:38:41 UTC
+++ openvdb/openvdb/CMakeLists.txt
@@ -128,8 +128,8 @@ if(OPENVDB_FUTURE_DEPRECATION AND FUTURE_MINIMUM_TBB_V
   endif()
 endif()
 
+find_package(Imath ${MINIMUM_ILMBASE_VERSION} REQUIRED)
 if(USE_IMATH_HALF)
-  find_package(IlmBase ${MINIMUM_ILMBASE_VERSION} REQUIRED COMPONENTS Half)
   if(OPENVDB_FUTURE_DEPRECATION AND FUTURE_MINIMUM_ILMBASE_VERSION)
     if(${IlmBase_VERSION} VERSION_LESS FUTURE_MINIMUM_ILMBASE_VERSION)
       message(DEPRECATION "Support for IlmBase versions < ${FUTURE_MINIMUM_ILMBASE_VERSION} "
@@ -191,7 +191,7 @@ set(OPENVDB_CORE_DEPENDENT_LIBS
 )
 
 if(USE_IMATH_HALF)
-  list(APPEND OPENVDB_CORE_DEPENDENT_LIBS IlmBase::Half)
+  list(APPEND OPENVDB_CORE_DEPENDENT_LIBS Imath::Half)
 endif()
 
 if(WIN32)