diff --git a/audio/umurmur/patches/patch-src_main_c b/audio/umurmur/patches/patch-src_main_c
index e5eba4286f7..e9dd069f8c4 100644
--- a/audio/umurmur/patches/patch-src_main_c
+++ b/audio/umurmur/patches/patch-src_main_c
@@ -1,14 +1,68 @@
-$OpenBSD: patch-src_main_c,v 1.1 2011/10/30 16:05:35 dcoppa Exp $
---- src/main.c.orig	Sun Oct 30 16:38:20 2011
-+++ src/main.c	Sun Oct 30 16:39:18 2011
-@@ -235,8 +235,9 @@ int main(int argc, char **argv)
+$OpenBSD: patch-src_main_c,v 1.2 2012/03/30 06:09:54 ajacoutot Exp $
+--- src/main.c.orig	Tue Oct 11 06:44:58 2011
++++ src/main.c	Sat Mar 24 10:57:15 2012
+@@ -41,7 +41,7 @@
+ #include <errno.h>
+ #include <string.h>
+ #include <stdlib.h>
+-#ifdef _POSIX_PRIORITY_SCHEDULING
++#if defined(_POSIX_PRIORITY_SCHEDULING) && (_POSIX_PRIORITY_SCHEDULING > 0)
+ #include <sched.h>
+ #endif
+ #include "server.h"
+@@ -200,7 +200,7 @@ void daemonize()
+ 		
+ }
+ 
+-#ifdef _POSIX_PRIORITY_SCHEDULING
++#if defined(_POSIX_PRIORITY_SCHEDULING) && (_POSIX_PRIORITY_SCHEDULING > 0)
+ void setscheduler()
+ {
+ 	int rc;
+@@ -219,7 +219,7 @@ void printhelp()
+ 	printf("uMurmur version %s. Mumble protocol %d.%d.%d\n", UMURMUR_VERSION, PROTVER_MAJOR, PROTVER_MINOR, PROTVER_PATCH);
+ 	printf("Usage: umurmurd [-d] [-r] [-h] [-p <pidfile>] [-t] [-c <conf file>] [-a <addr>] [-b <port>]\n");
+ 	printf("       -d             - Do not daemonize - run in foreground.\n");
+-#ifdef _POSIX_PRIORITY_SCHEDULING
++#if defined(_POSIX_PRIORITY_SCHEDULING) && (_POSIX_PRIORITY_SCHEDULING > 0)
+ 	printf("       -r             - Run with realtime priority\n");
+ #endif
+ 	printf("       -p <pidfile>   - Write PID to this file\n");
+@@ -234,15 +234,16 @@ void printhelp()
+ int main(int argc, char **argv)
  {
  	bool_t nodaemon = false;
- #ifdef _POSIX_PRIORITY_SCHEDULING
+-#ifdef _POSIX_PRIORITY_SCHEDULING
 -	bool_t realtime = false, testconfig = false;
++#if defined(_POSIX_PRIORITY_SCHEDULING) && (_POSIX_PRIORITY_SCHEDULING > 0)
 +	bool_t realtime = false;
  #endif
 +	bool_t testconfig = false;
  	char *conffile = NULL, *pidfile = NULL;
  	int c;
  	struct utsname utsbuf;
+ 	
+ 	/* Arguments */
+-#ifdef _POSIX_PRIORITY_SCHEDULING
++#if defined(_POSIX_PRIORITY_SCHEDULING) && (_POSIX_PRIORITY_SCHEDULING > 0)
+ 	while ((c = getopt(argc, argv, "drp:c:a:b:ht")) != EOF) {
+ #else
+ 	while ((c = getopt(argc, argv, "dp:c:a:b:ht")) != EOF) {
+@@ -269,7 +270,7 @@ int main(int argc, char **argv)
+ 		case 't':
+ 			testconfig = true;
+ 			break;
+-#ifdef _POSIX_PRIORITY_SCHEDULING
++#if defined(_POSIX_PRIORITY_SCHEDULING) && (_POSIX_PRIORITY_SCHEDULING > 0)
+ 		case 'r':
+ 			realtime = true;
+ 			break;
+@@ -333,7 +334,7 @@ int main(int argc, char **argv)
+ 	Chan_init();
+ 	Client_init();
+ 
+-#ifdef _POSIX_PRIORITY_SCHEDULING
++#if defined(_POSIX_PRIORITY_SCHEDULING) && (_POSIX_PRIORITY_SCHEDULING > 0)
+ 	if (realtime)
+ 		setscheduler();
+ #endif
diff --git a/devel/commoncpp/patches/patch-src_process_cpp b/devel/commoncpp/patches/patch-src_process_cpp
new file mode 100644
index 00000000000..fae726e74f1
--- /dev/null
+++ b/devel/commoncpp/patches/patch-src_process_cpp
@@ -0,0 +1,30 @@
+$OpenBSD: patch-src_process_cpp,v 1.1 2012/03/30 06:09:54 ajacoutot Exp $
+--- src/process.cpp.orig	Fri Jan 16 07:27:00 2009
++++ src/process.cpp	Sat Mar 24 10:15:59 2012
+@@ -526,7 +526,7 @@ void    Process::attach(const char *dev)
+ 
+ void Process::setScheduler(const char *pol)
+ {
+-#ifdef	_POSIX_PRIORITY_SCHEDULING
++#if defined(_POSIX_PRIORITY_SCHEDULING) && (_POSIX_PRIORITY_SCHEDULING > 0)
+ 	struct sched_param p;
+ 	int policy;
+ 
+@@ -582,7 +582,7 @@ void Process::setScheduler(const char *pol)
+ 
+ void Process::setPriority(int pri)
+ {
+-#ifdef  _POSIX_PRIORITY_SCHEDULING
++#if defined(_POSIX_PRIORITY_SCHEDULING) && (_POSIX_PRIORITY_SCHEDULING > 0)
+ 	struct sched_param p;
+ 	int policy = sched_getscheduler(0);
+ 	int min = sched_get_priority_min(policy);
+@@ -607,7 +607,7 @@ void Process::setPriority(int pri)
+ 
+ bool Process::isScheduler(void)
+ {
+-#ifdef  _POSIX_PRIORITY_SCHEDULING
++#if defined(_POSIX_PRIORITY_SCHEDULING) && (_POSIX_PRIORITY_SCHEDULING > 0)
+ 	return true;
+ #else
+ 	return false;
diff --git a/multimedia/libdv/patches/patch-encodedv_dvconnect_c b/multimedia/libdv/patches/patch-encodedv_dvconnect_c
new file mode 100644
index 00000000000..4e6926862ba
--- /dev/null
+++ b/multimedia/libdv/patches/patch-encodedv_dvconnect_c
@@ -0,0 +1,12 @@
+$OpenBSD: patch-encodedv_dvconnect_c,v 1.3 2012/03/30 06:09:54 ajacoutot Exp $
+--- encodedv/dvconnect.c.orig	Sat Mar 24 10:10:08 2012
++++ encodedv/dvconnect.c	Sat Mar 24 10:13:34 2012
+@@ -857,7 +857,7 @@ int send_raw(const char*const* filenames, int channel,
+ 
+ int rt_raisepri (int pri)
+ {
+-#ifdef _SC_PRIORITY_SCHEDULING
++#if defined(_POSIX_PRIORITY_SCHEDULING) && (_POSIX_PRIORITY_SCHEDULING > 0)
+ 	struct sched_param scp;
+ 
+ 	/*
diff --git a/sysutils/heartbeat/patches/patch-lib_clplumbing_realtime_c b/sysutils/heartbeat/patches/patch-lib_clplumbing_realtime_c
new file mode 100644
index 00000000000..bfb275cd9df
--- /dev/null
+++ b/sysutils/heartbeat/patches/patch-lib_clplumbing_realtime_c
@@ -0,0 +1,21 @@
+$OpenBSD: patch-lib_clplumbing_realtime_c,v 1.1 2012/03/30 06:09:54 ajacoutot Exp $
+--- lib/clplumbing/realtime.c.orig	Fri Mar 23 18:05:27 2012
++++ lib/clplumbing/realtime.c	Sat Mar 24 10:19:25 2012
+@@ -31,7 +31,7 @@
+ #	include <sys/time.h>
+ #	include <sys/resource.h>
+ #endif
+-#ifdef _POSIX_PRIORITY_SCHEDULING
++#if defined(_POSIX_PRIORITY_SCHEDULING) && (_POSIX_PRIORITY_SCHEDULING > 0)
+ #	include <sched.h>
+ #endif
+ #include <string.h>
+@@ -44,7 +44,7 @@
+ static gboolean	cl_realtimepermitted = TRUE;
+ static void cl_rtmalloc_setup(void);
+ 
+-#if defined(SCHED_RR) && defined(_POSIX_PRIORITY_SCHEDULING) && !defined(ON_DARWIN)
++#if defined(_POSIX_PRIORITY_SCHEDULING) && (_POSIX_PRIORITY_SCHEDULING > 0) && defined(SCHED_RR) && !defined(ON_DARWIN)
+ #	define DEFAULT_REALTIME	SCHED_RR
+ #endif
+ 
diff --git a/sysutils/heartbeat/patches/patch-lib_stonith_expect_c b/sysutils/heartbeat/patches/patch-lib_stonith_expect_c
new file mode 100644
index 00000000000..200492f8b15
--- /dev/null
+++ b/sysutils/heartbeat/patches/patch-lib_stonith_expect_c
@@ -0,0 +1,21 @@
+$OpenBSD: patch-lib_stonith_expect_c,v 1.1 2012/03/30 06:09:54 ajacoutot Exp $
+--- lib/stonith/expect.c.orig	Fri Mar 23 18:01:26 2012
++++ lib/stonith/expect.c	Sat Mar 24 10:19:56 2012
+@@ -47,7 +47,7 @@
+ #define ENABLE_PIL_DEFS_PRIVATE
+ #include <pils/plugin.h>
+ 
+-#ifdef _POSIX_PRIORITY_SCHEDULING
++#if defined(_POSIX_PRIORITY_SCHEDULING) && (_POSIX_PRIORITY_SCHEDULING > 0)
+ #	include <sched.h>
+ #endif
+ 
+@@ -301,7 +301,7 @@ StartProcess(const char * cmd, int * readfd, int * wri
+ 				dup2(rdpipe[1], 1);
+ 				close(rdpipe[0]);
+ 				close(rdpipe[1]);
+-#if defined(SCHED_OTHER) && !defined(ON_DARWIN)
++#if defined(_POSIX_PRIORITY_SCHEDULING) && (_POSIX_PRIORITY_SCHEDULING > 0) && defined(SCHED_OTHER) && !defined(ON_DARWIN)
+ 			{
+ 				/*
+ 				 * Try and (re)set our scheduling to "normal"