--- a/src/pulsecore/mutex-posix.c
+++ b/src/pulsecore/mutex-posix.c
@@ -50,8 +50,10 @@
         pa_assert_se(pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE) == 0);
 
 #ifdef HAVE_PTHREAD_PRIO_INHERIT
-    if (inherit_priority)
-        pa_assert_se(pthread_mutexattr_setprotocol(&attr, PTHREAD_PRIO_INHERIT) == 0);
+    if (inherit_priority) {
+        r = pthread_mutexattr_setprotocol(&attr, PTHREAD_PRIO_INHERIT);
+        pa_assert_se(r == 0 || r == ENOTSUP);
+    }
 #endif
 
     m = pa_xnew(pa_mutex, 1);
--- a/src/modules/rtp/rtp.c
+++ b/src/modules/rtp/rtp.c
@@ -278,7 +278,7 @@
     }
 
     for (cm = CMSG_FIRSTHDR(&m); cm; cm = CMSG_NXTHDR(&m, cm))
-        if (cm->cmsg_level == SOL_SOCKET && cm->cmsg_type == SO_TIMESTAMP) {
+        if (cm->cmsg_level == SOL_SOCKET && cm->cmsg_type == SCM_TIMESTAMP) {
             memcpy(tstamp, CMSG_DATA(cm), sizeof(struct timeval));
             found_tstamp = TRUE;
             break;
--- a/src/modules/rtp/module-rtp-recv.c
+++ b/src/modules/rtp/module-rtp-recv.c
@@ -428,11 +428,16 @@
 
     pa_make_udp_socket_low_delay(fd);
 
+#ifdef SO_TIMESTAMP
     one = 1;
     if (setsockopt(fd, SOL_SOCKET, SO_TIMESTAMP, &one, sizeof(one)) < 0) {
         pa_log("SO_TIMESTAMP failed: %s", pa_cstrerror(errno));
         goto fail;
     }
+#else
+    pa_log("SO_TIMESTAMP unsupported on this platform");
+    goto fail;
+#endif
 
     one = 1;
     if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)) < 0) {
--- a/src/modules/module-pipe-source.c
+++ b/src/modules/module-pipe-source.c
@@ -286,7 +286,7 @@
 
     pa_source_set_asyncmsgq(u->source, u->thread_mq.inq);
     pa_source_set_rtpoll(u->source, u->rtpoll);
-    pa_source_set_fixed_latency(u->source, pa_bytes_to_usec(PIPE_BUF, &u->source->sample_spec));
+    pa_source_set_fixed_latency(u->source, pa_bytes_to_usec(pa_pipe_buf(u->fd), &u->source->sample_spec));
 
     u->rtpoll_item = pa_rtpoll_item_new(u->rtpoll, PA_RTPOLL_NEVER, 1);
     pollfd = pa_rtpoll_item_get_pollfd(u->rtpoll_item, NULL);
--- a/src/utils/pacmd.c
+++ b/src/utils/pacmd.c
@@ -47,8 +47,9 @@
     int fd = -1;
     int ret = 1, i;
     struct sockaddr_un sa;
-    char ibuf[PIPE_BUF], obuf[PIPE_BUF];
-    size_t ibuf_index, ibuf_length, obuf_index, obuf_length;
+    char *ibuf = NULL;
+    char *obuf = NULL;
+    size_t ibuf_size, ibuf_index, ibuf_length, obuf_size, obuf_index, obuf_length;
     char *cli;
     pa_bool_t ibuf_eof, obuf_eof, ibuf_closed, obuf_closed;
     struct pollfd pollfd[3];
@@ -102,6 +103,11 @@
         goto fail;
     }
 
+    i = pa_pipe_buf(fd);
+    ibuf_size = PA_MIN(i, pa_pipe_buf(STDIN_FILENO));
+    ibuf = pa_xmalloc(ibuf_size);
+    obuf_size = PA_MIN(i, pa_pipe_buf(STDOUT_FILENO));
+    obuf = pa_xmalloc(obuf_size);
     ibuf_index = ibuf_length = obuf_index = obuf_length = 0;
     ibuf_eof = obuf_eof = ibuf_closed = obuf_closed = FALSE;
 
@@ -109,11 +115,11 @@
         for (i = 1; i < argc; i++) {
             size_t k;
 
-            k = PA_MIN(sizeof(ibuf) - ibuf_length, strlen(argv[i]));
+            k = PA_MIN(ibuf_size - ibuf_length, strlen(argv[i]));
             memcpy(ibuf + ibuf_length, argv[i], k);
             ibuf_length += k;
 
-            if (ibuf_length < sizeof(ibuf)) {
+            if (ibuf_length < ibuf_size) {
                 ibuf[ibuf_length] = i < argc-1 ? ' ' : '\n';
                 ibuf_length++;
             }
@@ -182,7 +188,7 @@
                 ssize_t r;
                 pa_assert(ibuf_length <= 0);
 
-                if ((r = pa_read(STDIN_FILENO, ibuf, sizeof(ibuf), &stdin_type)) <= 0) {
+                if ((r = pa_read(STDIN_FILENO, ibuf, ibuf_size, &stdin_type)) <= 0) {
                     if (r < 0) {
                         pa_log(_("read(): %s"), strerror(errno));
                         goto fail;
@@ -202,7 +208,7 @@
                 ssize_t r;
                 pa_assert(obuf_length <= 0);
 
-                if ((r = pa_read(fd, obuf, sizeof(obuf), &fd_type)) <= 0) {
+                if ((r = pa_read(fd, obuf, obuf_size, &fd_type)) <= 0) {
                     if (r < 0) {
                         pa_log(_("read(): %s"), strerror(errno));
                         goto fail;
@@ -260,5 +266,8 @@
     if (fd >= 0)
         pa_close(fd);
 
+    pa_xfree(obuf);
+    pa_xfree(ibuf);
+
     return ret;
 }