Googletest export

Adding GTEST_INTERNAL_DEPRECATED ability to mark deprecated

PiperOrigin-RevId: 219515184

googletest/include/gtest/internal/gtest-internal.h

@@ -1423,4 +1423,19 @@ class FlatTuple
               test_case_name, test_name)>);                                   \
   void GTEST_TEST_CLASS_NAME_(test_case_name, test_name)::TestBody()
 
+// Internal Macro to mark an API deprecated, for googletest usage only
+// Usage: class GTEST_INTERNAL_DEPRECATED(message) MyClass or
+// GTEST_INTERNAL_DEPRECATED(message) <return_type> myFunction(); Every usage of
+// a deprecated entity will trigger a warning when compiled with
+// `-Wdeprecated-declarations` option (clang, gcc, any __GNUC__ compiler).
+// For msvc /W3 option will need to be used
+// Note that for 'other' compilers this macro evaluates to nothing to prevent
+// compilations errors.
+#if defined(_MSC_VER)
+#define GTEST_INTERNAL_DEPRECATED(message) __declspec(deprecated(message))
+#elif defined(__GNUC__)
+#define GTEST_INTERNAL_DEPRECATED(message) __attribute__((deprecated(message)))
+#else
+#define GTEST_INTERNAL_DEPRECATED(message)
+#endif
 #endif  // GTEST_INCLUDE_GTEST_INTERNAL_GTEST_INTERNAL_H_