wget now correctly reads that -o- means logging to stdout instead of the file '-'. I just checked for a hyphen at log_init, didn't see any caveats to this.
--- src/log.c.origin 2015-03-13 01:32:27.000000000 +0100 +++ src/log.c 2015-03-13 01:44:31.000000000 +0100 @@ -598,11 +598,18 @@ { if (file) { - logfp = fopen (file, appendp ? "a" : "w"); - if (!logfp) + if (HYPHENP (file)) { - fprintf (stderr, "%s: %s: %s\n", exec_name, file, strerror (errno)); - exit (WGET_EXIT_GENERIC_ERROR); + logfp = stdout; + } + else + { + logfp = fopen (file, appendp ? "a" : "w"); + if (!logfp) + { + fprintf (stderr, "%s: %s: %s\n", exec_name, file, strerror (errno)); + exit (WGET_EXIT_GENERIC_ERROR); + } } } else Miquel Llobet