-dnl Actually, this tests only whether it returns an array,
-dnl but that should be enough.
-dnl This is used by lib/error.c.
+dnl Actually, this tests only whether it returns a scalar
+dnl or an array, but that should be enough.
+dnl On at least DEC UNIX 4.0[A-D] and HP-UX B.10.20, strerror_r
+dnl returns `int'. This is used by lib/error.c.