Support use of external/system GTest installation (#1469)

* Support use of system/external GTest installation

* Create working directory for tests explicitly

CMakeLists.txt

@@ -133,6 +133,7 @@ set(CUTLASS_ENABLE_PERFORMANCE ${CUTLASS_ENABLE_PROFILER} CACHE BOOL "Enable CUT
 
 set(CUTLASS_ENABLE_TESTS ${CUTLASS_ENABLE_TESTS_INIT} CACHE BOOL "Enable CUTLASS Tests")
 set(CUTLASS_ENABLE_GTEST_UNIT_TESTS ${CUTLASS_ENABLE_TESTS} CACHE BOOL "Enable CUTLASS GTest-based Unit Tests")
+set(CUTLASS_USE_SYSTEM_GOOGLETEST OFF CACHE BOOL "Use system/external installation of GTest")
 ################################################################################
 
 set(CUTLASS_NVCC_ARCHS_SUPPORTED "")
@@ -702,7 +703,11 @@ include(CTest)
 enable_testing()
 
 if (CUTLASS_ENABLE_GTEST_UNIT_TESTS)
-  include(${CMAKE_CURRENT_SOURCE_DIR}/cmake/googletest.cmake)
+  if (CUTLASS_USE_SYSTEM_GOOGLETEST)
+    find_package(GTest REQUIRED)
+  else()
+    include(${CMAKE_CURRENT_SOURCE_DIR}/cmake/googletest.cmake)
+  endif()
 endif()
 
 if (NOT TARGET test_all)
@@ -747,6 +752,7 @@ set(CUTLASS_DEFAULT_ACTIVE_TEST_SETS "default" CACHE STRING "Default
   with CUTLASS_TEST_SETS environment variable when running the ctest
   executable.")
 
+file(MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_BINDIR}")
 set(CUTLASS_CTEST_TEMPLATE_FILE ${CMAKE_CURRENT_LIST_DIR}/cmake/CTestTestfile.configure.cmake)
 set(CUTLASS_CTEST_GENERATED_FILES "" CACHE INTERNAL "")
 

test/unit/CMakeLists.txt

@@ -42,7 +42,7 @@ target_link_libraries(
   CUTLASS
   cutlass_tools_util_includes
   $<$<BOOL:${CUTLASS_ENABLE_CUBLAS}>:nvidia::cublas>
-  gtest
+  GTest::gtest
   cudart
   cuda_driver
   )
@@ -84,7 +84,7 @@ function(cutlass_test_unit_add_executable NAME)
     target_link_libraries(
       ${NAME}
       PUBLIC
-      gtest
+      GTest::gtest
     )
   else()
     target_link_libraries(