Use #if and not #ifdef to check filesystem support
diff --git a/googletest/src/gtest-internal-inl.h b/googletest/src/gtest-internal-inl.h
index 1e9b5c2..5b7fcbd 100644
--- a/googletest/src/gtest-internal-inl.h
+++ b/googletest/src/gtest-internal-inl.h
@@ -672,7 +672,7 @@
void AddTestInfo(internal::SetUpTestSuiteFunc set_up_tc,
internal::TearDownTestSuiteFunc tear_down_tc,
TestInfo* test_info) {
-#ifdef GTEST_HAS_FILE_SYSTEM
+#if GTEST_HAS_FILE_SYSTEM
// In order to support thread-safe death tests, we need to
// remember the original working directory when the test program
// was first invoked. We cannot do this in RUN_ALL_TESTS(), as
