}
vfprintf(stderr, s, ap);
if (syserr) {
+#if defined(cygwin32_HOST_OS) || defined (mingw32_HOST_OS)
+ // Win32 error messages have a terminating \n
+ fprintf(stderr, ": %s", syserr);
+#else
fprintf(stderr, ": %s\n", syserr);
+#endif
} else {
fprintf(stderr, "\n");
}