-# if @REPLACE_LOCALTIME_R@
-# undef localtime_r
-# define localtime_r rpl_localtime_r
-# undef gmtime_r
-# define gmtime_r rpl_gmtime_r
-extern struct tm *localtime_r (time_t const *restrict __timer,
- struct tm *restrict __result)
- _GL_ARG_NONNULL ((1, 2));
-extern struct tm *gmtime_r (time_t const *restrict __timer,
- struct tm *restrict __result)
- _GL_ARG_NONNULL ((1, 2));
+# if @GNULIB_TIME_R@
+# if @REPLACE_LOCALTIME_R@
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# undef localtime_r
+# define localtime_r rpl_localtime_r
+# endif
+_GL_FUNCDECL_RPL (localtime_r, struct tm *, (time_t const *restrict __timer,
+ struct tm *restrict __result)
+ _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (localtime_r, struct tm *, (time_t const *restrict __timer,
+ struct tm *restrict __result));
+# else
+# if ! @HAVE_DECL_LOCALTIME_R@
+_GL_FUNCDECL_SYS (localtime_r, struct tm *, (time_t const *restrict __timer,
+ struct tm *restrict __result)
+ _GL_ARG_NONNULL ((1, 2)));
+# endif
+_GL_CXXALIAS_SYS (localtime_r, struct tm *, (time_t const *restrict __timer,
+ struct tm *restrict __result));
+# endif
+# if @HAVE_DECL_LOCALTIME_R@
+_GL_CXXALIASWARN (localtime_r);
+# endif
+# if @REPLACE_LOCALTIME_R@
+# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
+# undef gmtime_r
+# define gmtime_r rpl_gmtime_r
+# endif
+_GL_FUNCDECL_RPL (gmtime_r, struct tm *, (time_t const *restrict __timer,
+ struct tm *restrict __result)
+ _GL_ARG_NONNULL ((1, 2)));
+_GL_CXXALIAS_RPL (gmtime_r, struct tm *, (time_t const *restrict __timer,
+ struct tm *restrict __result));
+# else
+# if ! @HAVE_DECL_LOCALTIME_R@
+_GL_FUNCDECL_SYS (gmtime_r, struct tm *, (time_t const *restrict __timer,
+ struct tm *restrict __result)
+ _GL_ARG_NONNULL ((1, 2)));
+# endif
+_GL_CXXALIAS_SYS (gmtime_r, struct tm *, (time_t const *restrict __timer,
+ struct tm *restrict __result));
+# endif
+# if @HAVE_DECL_LOCALTIME_R@
+_GL_CXXALIASWARN (gmtime_r);
+# endif