#if (_XOPEN_SOURCE >= 600) || POCO_OS == POCO_OS_ANDROID || __APPLE__
setMessage(strerror_r(err, _buffer, sizeof(_buffer)));
-#elif _GNU_SOURCE
-+#elif (_GNU_SOURCE && (defined __GLIBC__ || defined __UCLIBC__))
++#elif (defined(_GNU_SOURCE) && defined(__GLIBC__))
setMessage(strerror_r(err, _buffer, sizeof(_buffer)));
#else
setMessage(strerror(err));