diff --git a/hio/bin/t01.c b/hio/bin/t01.c
index f81bc2b..d0b803a 100644
--- a/hio/bin/t01.c
+++ b/hio/bin/t01.c
@@ -965,8 +965,8 @@ if (hio_htre_getcontentlen(req) > 0)
 		}
 		else
 
-		{
 #endif
+		{
 			const hio_bch_t* qpath = hio_htre_getqpath(req);
 			int x;
 			if (hio_comp_bcstr_limited(qpath, "/thr/", 5, 1) == 0)
@@ -978,6 +978,10 @@ if (hio_htre_getcontentlen(req) > 0)
 			else
 				x = hio_svc_htts_dofile(htts, csck, req, "", hio_htre_getqpath(req), "text/plain");
 			if (x <= -1) goto oops;
+		}
+#if 0
+	}
+#endif
 
 	return 0;
 
diff --git a/hio/bin/t06.c b/hio/bin/t06.c
index a593263..3a1afe6 100644
--- a/hio/bin/t06.c
+++ b/hio/bin/t06.c
@@ -191,8 +191,8 @@ if (hio_htre_getcontentlen(req) > 0)
 		}
 		else
 
-		{
 #endif
+		{
 			const hio_bch_t* qpath = hio_htre_getqpath(req);
 			int x;
 			if (hio_comp_bcstr_limited(qpath, "/thr/", 5, 1) == 0)
@@ -206,6 +206,10 @@ if (hio_htre_getcontentlen(req) > 0)
 			else
 				x = hio_svc_htts_dofile(htts, csck, req, "", hio_htre_getqpath(req), "text/plain");
 			if (x <= -1) goto oops;
+		}
+#if 0
+	}
+#endif
 
 	return 0;
 
@@ -415,12 +419,13 @@ static int try_to_accept (hio_dev_sck_t* sck, hio_dev_sck_qxmsg_t* qxmsg, int in
 		}
 		else
 		{
+			const char* msg;
 		sidechan_write_error:
 //printf ("sidechannel write error errno=%d strerror=%s\n", errno, strerror(errno));
 			hio_skadtobcstr (hio, &qxmsg->remoteaddr, buf, HIO_COUNTOF(buf), HIO_SKAD_TO_BCSTR_ADDR | HIO_SKAD_TO_BCSTR_PORT); 
 			HIO_INFO2 (hio, "unable to handle the accepted connection %ld from %hs\n", (long int)qxmsg->syshnd, buf);
 
-			const char* msg = "HTTP/1.0 503 Service unavailable\r\nConnection: close\r\nContent-Length: 0\r\n\r\n";
+			msg = "HTTP/1.0 503 Service unavailable\r\nConnection: close\r\nContent-Length: 0\r\n\r\n";
 			write (qxmsg->syshnd, msg, strlen(msg));
 	printf ("close %d\n", qxmsg->syshnd);
 			close (qxmsg->syshnd);
diff --git a/hio/lib/http-file.c b/hio/lib/http-file.c
index fb65485..2d86f50 100644
--- a/hio/lib/http-file.c
+++ b/hio/lib/http-file.c
@@ -567,10 +567,17 @@ static HIO_INLINE int process_range_header (file_t* file, hio_htre_t* req)
 
 	if (file->req_method == HIO_HTTP_GET)
 	{
+	#if defined(HAVE_STRUCT_STAT_MTIM)
 		etag_len = hio_fmt_uintmax_to_bcstr(&file->peer_etag[0], HIO_COUNTOF(file->peer_etag), st.st_mtim.tv_sec, 16, -1, '\0', HIO_NULL);
 		file->peer_etag[etag_len++] = '-';
+		#if defined(HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC)
 		etag_len += hio_fmt_uintmax_to_bcstr(&file->peer_etag[etag_len], HIO_COUNTOF(file->peer_etag), st.st_mtim.tv_nsec, 16, -1, '\0', HIO_NULL);
 		file->peer_etag[etag_len++] = '-';
+		#endif
+	#else
+		etag_len = hio_fmt_uintmax_to_bcstr(&file->peer_etag[0], HIO_COUNTOF(file->peer_etag), st.st_mtime, 16, -1, '\0', HIO_NULL);
+		file->peer_etag[etag_len++] = '-';
+	#endif
 		etag_len += hio_fmt_uintmax_to_bcstr(&file->peer_etag[etag_len], HIO_COUNTOF(file->peer_etag) - etag_len, st.st_size, 16, -1, '\0', HIO_NULL);
 		file->peer_etag[etag_len++] = '-';
 		etag_len += hio_fmt_uintmax_to_bcstr(&file->peer_etag[etag_len], HIO_COUNTOF(file->peer_etag) - etag_len, st.st_ino, 16, -1, '\0', HIO_NULL);
diff --git a/hio/lib/sck.c b/hio/lib/sck.c
index 1e6f8f7..54b0c1f 100644
--- a/hio/lib/sck.c
+++ b/hio/lib/sck.c
@@ -1235,6 +1235,7 @@ static int dev_sck_ioctl (hio_dev_t* dev, int cmd, void* arg)
 
 			if (hio_skad_get_family(&bnd->localaddr) == HIO_AF_INET6) /* getsockopt(rdev->hnd, SO_DOMAIN, ...) may return the domain but it's kernel specific as well */
 			{
+			#if defined(IPV6_V6ONLY)
 				/* TODO: should i make it into bnd->options? HIO_DEV_SCK_BIND_IPV6ONLY? applicable to ipv6 though. */
 				int v = 1;
 				if (setsockopt(rdev->hnd, IPPROTO_IPV6, IPV6_V6ONLY, &v, HIO_SIZEOF(v)) <= -1)
@@ -1245,6 +1246,7 @@ static int dev_sck_ioctl (hio_dev_t* dev, int cmd, void* arg)
 						return -1;
 					}
 				}
+			#endif
 			}
 
 			if (bnd->options & HIO_DEV_SCK_BIND_BROADCAST)