From 9d35ec163185c0cf5759c38daf03e9890e9d0657 Mon Sep 17 00:00:00 2001
From: Robert Osfield <robert@openscenegraph.com>
Date: Wed, 24 Mar 2010 17:12:05 +0000
Subject: [PATCH] Added a compile test for pthread_setaffinity_np to workaround
 problem with the FreeBSD pthread lib containing the function but the
 pthread.h header not containing it.

---
 src/OpenThreads/pthreads/CMakeLists.txt | 30 ++++++++++++++++++++-----
 1 file changed, 24 insertions(+), 6 deletions(-)

diff --git a/src/OpenThreads/pthreads/CMakeLists.txt b/src/OpenThreads/pthreads/CMakeLists.txt
index b20006be4..a297bd50d 100644
--- a/src/OpenThreads/pthreads/CMakeLists.txt
+++ b/src/OpenThreads/pthreads/CMakeLists.txt
@@ -30,6 +30,7 @@ ENDIF()
 SET(CMAKE_REQUIRED_LIBRARIES_SAFE "${CMAKE_REQUIRED_LIBRARIES}")
 SET(CMAKE_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT})
 
+
 CHECK_FUNCTION_EXISTS(pthread_yield HAVE_PTHREAD_YIELD)
 IF(HAVE_PTHREAD_YIELD)
   ADD_DEFINITIONS(-DHAVE_PTHREAD_YIELD)
@@ -64,16 +65,33 @@ IF(HAVE_PTHREAD_GETCONCURRENCY)
 ENDIF()
 
 CHECK_FUNCTION_EXISTS(pthread_setaffinity_np HAVE_PTHREAD_SETAFFINITY_NP)
+IF(HAVE_PTHREAD_SETAFFINITY_NP)
+  # double check that pthread_setaffinity_np is available as FreeBSD header doesn't contain required function
+  CHECK_CXX_SOURCE_COMPILES("
+        #include <pthread.h>
+        int main() {
+        cpu_set_t cpumask;
+        CPU_ZERO( &cpumask );
+        CPU_SET( 0, &cpumask );
+        pthread_setaffinity_np( pthread_self(), sizeof(cpumask), &cpumask);
+        return 0;
+        }" COMPILES_PTHREAD_SETAFFINITY_NP)
+
+    IF (NOT COMPILES_PTHREAD_SETAFFINITY_NP)
+        SET(HAVE_PTHREAD_SETAFFINITY_NP OFF)
+    ENDIF()
+ENDIF()
+
 IF(HAVE_PTHREAD_SETAFFINITY_NP)
   ADD_DEFINITIONS(-DHAVE_PTHREAD_SETAFFINITY_NP)
 ELSE()
   CHECK_CXX_SOURCE_COMPILES("
-#include <sched.h>
-int main() {
-  cpu_set_t cpumask;
-  sched_setaffinity( 0, sizeof(cpumask), &cpumask );
-  return 0;
-}" HAVE_THREE_PARAM_SCHED_SETAFFINITY)
+        #include <sched.h>
+        int main() {
+        cpu_set_t cpumask;
+        sched_setaffinity( 0, sizeof(cpumask), &cpumask );
+        return 0;
+        }" HAVE_THREE_PARAM_SCHED_SETAFFINITY)
   IF(HAVE_THREE_PARAM_SCHED_SETAFFINITY)
     ADD_DEFINITIONS(-DHAVE_THREE_PARAM_SCHED_SETAFFINITY)
   ELSE()