--- gdb/common/signals.c.orig	2013-01-01 07:32:54.000000000 +0100
+++ gdb/common/signals.c	2013-11-25 16:12:56.000000000 +0100
@@ -46,6 +46,12 @@
 # endif
 #endif
 
+#ifdef __FreeBSD__
+# ifndef SIGLIBRT
+#  define SIGLIBRT 33 /* Older versions do not define the constant */
+# endif
+#endif
+
 /* This table must match in order and size the signals in enum
    gdb_signal.  */
 
@@ -334,6 +340,11 @@
     return GDB_SIGNAL_INFO;
 #endif
 
+#if defined (SIGLIBRT)
+  if ( hostsig == SIGLIBRT )
+    return GDB_SIGNAL_FBSD_LIBRT;
+#endif
+
 #if defined (REALTIME_LO)
   if (hostsig >= REALTIME_LO && hostsig < REALTIME_HI)
     {
@@ -591,6 +602,11 @@
       return SIGINFO;
 #endif
 
+#if defined (SIGLIBRT)
+    case GDB_SIGNAL_FBSD_LIBRT:
+      return SIGLIBRT;
+#endif
+
     default:
 #if defined (REALTIME_LO)
       retsig = 0;
--- gdb/infrun.c.orig	2013-08-30 17:58:55.000000000 +0200
+++ gdb/infrun.c	2013-11-22 16:12:58.000000000 +0100
@@ -7291,6 +7291,8 @@
   signal_print[GDB_SIGNAL_WINCH] = 0;
   signal_stop[GDB_SIGNAL_PRIO] = 0;
   signal_print[GDB_SIGNAL_PRIO] = 0;
+  signal_stop[GDB_SIGNAL_FBSD_LIBRT] = 0;
+  signal_print[GDB_SIGNAL_FBSD_LIBRT] = 0;
 
   /* These signals are used internally by user-level thread
      implementations.  (See signal(5) on Solaris.)  Like the above
--- include/gdb/signals.def.orig	2013-01-01 07:41:30.000000000 +0100
+++ include/gdb/signals.def	2013-11-25 16:13:42.000000000 +0100
@@ -197,4 +197,5 @@
 /* If you are adding a new signal, add it just above this comment.  */
 
 /* Last and unused enum value, for sizing arrays, etc.  */
-SET (GDB_SIGNAL_LAST, 151, NULL, "GDB_SIGNAL_MAGIC")
+SET (GDB_SIGNAL_FBSD_LIBRT, 151, "SIGLIBRT", "GDB_SIGNAL_FBSD_LIBRT")
+SET (GDB_SIGNAL_LAST, 152, NULL, "GDB_SIGNAL_MAGIC")