4 files changed, 32 insertions, 1 deletions
diff --git a/cmake/Modules/GrMiscUtils.cmake b/cmake/Modules/GrMiscUtils.cmake
index 69ff1f5ddc..3803fba0b1 100644
--- a/cmake/Modules/GrMiscUtils.cmake
+++ b/cmake/Modules/GrMiscUtils.cmake
@@ -317,3 +317,31 @@ function(GRCC)
 
   set(PYFILES ${pyfiles} PARENT_SCOPE)
 endfunction(GRCC)
+
+########################################################################
+# Check if HAVE_PTHREAD_SETSCHEDPARAM and HAVE_SCHED_SETSCHEDULER
+#  should be defined
+########################################################################
+macro(GR_CHECK_LINUX_SCHED_AVAIL)
+set(CMAKE_REQUIRED_LIBRARIES -lpthread)
+    CHECK_CXX_SOURCE_COMPILES("
+        #include <pthread.h>
+        int main(){
+            pthread_t pthread;
+            pthread_setschedparam(pthread,  0, 0);
+            return 0;
+        } " HAVE_PTHREAD_SETSCHEDPARAM
+    )
+    GR_ADD_COND_DEF(HAVE_PTHREAD_SETSCHEDPARAM)
+    
+    CHECK_CXX_SOURCE_COMPILES("
+        #include <sched.h>
+        int main(){
+            pid_t pid;
+            sched_setscheduler(pid, 0, 0);
+            return 0;
+        } " HAVE_SCHED_SETSCHEDULER
+    )
+    GR_ADD_COND_DEF(HAVE_SCHED_SETSCHEDULER)
+endmacro(GR_CHECK_LINUX_SCHED_AVAIL)
+
diff --git a/gnuradio-runtime/CMakeLists.txt b/gnuradio-runtime/CMakeLists.txt
index abdc969690..4940f7e58c 100644
--- a/gnuradio-runtime/CMakeLists.txt
+++ b/gnuradio-runtime/CMakeLists.txt
@@ -27,6 +27,7 @@ include(GrPython)
 # Setup compatibility checks and defines
 ########################################################################
 include(${CMAKE_CURRENT_SOURCE_DIR}/ConfigChecks.cmake)
+GR_CHECK_LINUX_SCHED_AVAIL()
 
 ########################################################################
 # Register component
diff --git a/gnuradio-runtime/lib/CMakeLists.txt b/gnuradio-runtime/lib/CMakeLists.txt
index 98db673f5d..1cde8ce323 100644
--- a/gnuradio-runtime/lib/CMakeLists.txt
+++ b/gnuradio-runtime/lib/CMakeLists.txt
@@ -123,6 +123,7 @@ list(APPEND gnuradio_runtime_sources
   gr_vmcircbuf_mmap_tmpfile.cc
   gr_vmcircbuf_sysv_shm.cc
   malloc16.c
+  realtime.cc
   runtime_block_gateway.cc
 )
 
diff --git a/gnuradio-runtime/lib/gr_realtime.cc b/gnuradio-runtime/lib/gr_realtime.cc
index d7a7eab5ba..9977718a5d 100644
--- a/gnuradio-runtime/lib/gr_realtime.cc
+++ b/gnuradio-runtime/lib/gr_realtime.cc
@@ -25,9 +25,10 @@
 #endif
 
 #include <gr_realtime.h>
+#include <realtime.h>
 
 gr_rt_status_t
 gr_enable_realtime_scheduling()
 {
-  return gr_enable_realtime_scheduling();
+  return gr::enable_realtime_scheduling();
 }