From: Paul Zander <negril.nx+gentoo@gmail.com>

remove redundant Find*.cmake files
use CMake 3.20 GTest targets for nanovdb
change vdb_ax_test WORKING_DIRECTORY so testfiles can be found
fix syntax for OpenVDBCXX.cmake

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9ecdaef..9dd416e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -287,9 +287,7 @@ if(OPENVDB_INSTALL_CMAKE_MODULES)
     cmake/FindBlosc.cmake
     cmake/FindJemalloc.cmake
     cmake/FindLog4cplus.cmake
-    cmake/FindOpenEXR.cmake
     cmake/FindOpenVDB.cmake
-    cmake/FindTBB.cmake
     cmake/OpenVDBGLFW3Setup.cmake
     cmake/OpenVDBHoudiniSetup.cmake
     cmake/OpenVDBMayaSetup.cmake
diff --git a/nanovdb/nanovdb/unittest/CMakeLists.txt b/nanovdb/nanovdb/unittest/CMakeLists.txt
index b0a32be..4d294f4 100644
--- a/nanovdb/nanovdb/unittest/CMakeLists.txt
+++ b/nanovdb/nanovdb/unittest/CMakeLists.txt
@@ -20,7 +20,7 @@ message(STATUS "----------------------------------------------------")

 ###############################################################################
 # TODO: Benchmark should probably not require gtest.
-if(NOT TARGET GTest::GTest)
+if(NOT TARGET GTest::gtest_main)
   message(WARNING " - GTest required to build unittests. Skipping.")
   return()
 endif()
@@ -36,14 +36,14 @@ file(MAKE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/data")
 # -----------------------------------------------------------------------------

 add_executable(nanovdb_test_nanovdb "TestNanoVDB.cc")
-target_link_libraries(nanovdb_test_nanovdb PRIVATE nanovdb GTest::GTest GTest::Main)
+target_link_libraries(nanovdb_test_nanovdb PRIVATE nanovdb GTest::gtest GTest::gtest_main)
 add_test(nanovdb_unit_test nanovdb_test_nanovdb)

 # -----------------------------------------------------------------------------

 if(NANOVDB_USE_CUDA)
   add_executable(nanovdb_test_cuda "TestNanoVDB.cu")
-  target_link_libraries(nanovdb_test_cuda PRIVATE nanovdb GTest::GTest GTest::Main)
+  target_link_libraries(nanovdb_test_cuda PRIVATE nanovdb GTest::gtest GTest::gtest_main)
   add_test(nanovdb_cuda_unit_test nanovdb_test_cuda)
 endif()

@@ -55,5 +55,5 @@ if(NOT (NANOVDB_USE_TBB AND NANOVDB_USE_OPENVDB))
 endif()

 add_executable(nanovdb_test_openvdb "TestOpenVDB.cc")
-target_link_libraries(nanovdb_test_openvdb PRIVATE nanovdb GTest::GTest GTest::Main)
+target_link_libraries(nanovdb_test_openvdb PRIVATE nanovdb GTest::gtest GTest::gtest_main)
 add_test(nanovdb_openvdb_unit_test nanovdb_test_openvdb)
diff --git a/openvdb_ax/openvdb_ax/test/CMakeLists.txt b/openvdb_ax/openvdb_ax/test/CMakeLists.txt
index e403f71..91774f8 100644
--- a/openvdb_ax/openvdb_ax/test/CMakeLists.txt
+++ b/openvdb_ax/openvdb_ax/test/CMakeLists.txt
@@ -131,7 +131,7 @@ if(OPENVDB_AX_TEST_PROFILE)
   target_compile_definitions(vdb_ax_test PRIVATE "-DPROFILE")
 endif()

-add_test(NAME vdb_ax_unit_test COMMAND vdb_ax_test -v WORKING_DIRECTORY ${CMAKE_CURRENT_LIST_DIR}/../)
+add_test(NAME vdb_ax_unit_test COMMAND vdb_ax_test -v WORKING_DIRECTORY ${CMAKE_BINARY_DIR})

 # For the undefined behaviour sanitizer, add the suppression file and
 # additional options
diff --git a/cmake/config/OpenVDBCXX.cmake b/cmake/config/OpenVDBCXX.cmake
index 5ad5d18..a6c4ebe 100644
--- a/cmake/config/OpenVDBCXX.cmake
+++ b/cmake/config/OpenVDBCXX.cmake
@@ -252,7 +252,7 @@ set(EXTRA_BUILD_TYPES coverage tsan asan lsan msan ubsan)
 # DebugNoInfo - An internal build type only used by the OpenVDB CI. no optimizations, no symbols, asserts enabled
 set(CMAKE_CXX_FLAGS_DebugNoInfo "" CACHE STRING "Flags used by the C++ compiler during DebugNoInfo builds.")

-foreach(TYPE ${EXTRA_BUILD_TYPES})
+foreach(TYPE IN LISTS EXTRA_BUILD_TYPES)
   set(CMAKE_CXX_FLAGS_${U_TYPE} "" CACHE STRING "Flags used by the C++ compiler during ${TYPE} builds.")
   set(CMAKE_SHARED_LINKER_FLAGS_${U_TYPE} "" CACHE STRING "Flags used by the linker during ${TYPE} builds.")
   set(CMAKE_EXE_LINKER_FLAGS_${U_TYPE} "" CACHE STRING "Flags used by the linker during ${TYPE} builds.")