Index: CMakeLists.txt
===================================================================
--- CMakeLists.txt
+++ CMakeLists.txt
@@ -24,6 +24,7 @@
   endif()
 
   # Enable unit tests if available.
+  set(POLLY_GTEST_AVAIL 0)
   set(UNITTEST_DIR ${LLVM_SOURCE_ROOT}/utils/unittest)
   if(EXISTS ${UNITTEST_DIR}/googletest/include/gtest/gtest.h)
     # The build tree already exports the gtest target, which we can reuse
Index: test/CMakeLists.txt
===================================================================
--- test/CMakeLists.txt
+++ test/CMakeLists.txt
@@ -62,12 +62,12 @@
 set_target_properties(check-polly-tests PROPERTIES FOLDER "Polly")
 add_dependencies(check-polly check-polly-tests)
 
-if (POLLY_GTEST_AVAIL)
-  configure_lit_site_cfg(
-    ${CMAKE_CURRENT_SOURCE_DIR}/Unit/lit.site.cfg.in
-    ${CMAKE_CURRENT_BINARY_DIR}/Unit/lit.site.cfg
-    )
+configure_lit_site_cfg(
+  ${CMAKE_CURRENT_SOURCE_DIR}/Unit/lit.site.cfg.in
+  ${CMAKE_CURRENT_BINARY_DIR}/Unit/lit.site.cfg
+  )
 
+if (POLLY_GTEST_AVAIL)
   # Run only unit tests
   add_lit_testsuite(check-polly-unittests "Running polly unit tests only"
     ${CMAKE_CURRENT_BINARY_DIR}/Unit
Index: test/Unit/lit.cfg
===================================================================
--- test/Unit/lit.cfg
+++ test/Unit/lit.cfg
@@ -11,6 +11,9 @@
 # name: The name of this test suite.
 config.name = 'Polly-Unit'
 
+if not config.has_unittests:
+    raise SystemExit
+
 # suffixes: A list of file extensions to treat as test files.
 config.suffixes = []
 
Index: test/Unit/lit.site.cfg.in
===================================================================
--- test/Unit/lit.site.cfg.in
+++ test/Unit/lit.site.cfg.in
@@ -14,6 +14,7 @@
 config.target_triple = "@TARGET_TRIPLE@"
 config.enable_gpgpu_codegen = "@GPU_CODEGEN@"
 config.link_polly_into_tools = "@LINK_POLLY_INTO_TOOLS@"
+config.has_unittests = @POLLY_GTEST_AVAIL@
 
 # Support substitution of the tools_dir, libs_dirs, and build_mode with user
 # parameters. This is used when we can't determine the tool dir at