$OpenBSD: patch-src_include_tbb_tbb_misc_h,v 1.1.1.1 2012/05/09 12:42:06 pascal Exp $
--- src/include/tbb/tbb_misc.h.orig	Mon Apr  2 00:57:09 2012
+++ src/include/tbb/tbb_misc.h	Mon Apr  2 00:58:06 2012
@@ -42,7 +42,7 @@
 #elif defined(__APPLE__)
 #include <sys/types.h>
 #include <sys/sysctl.h>
-#elif defined(__FreeBSD__)
+#elif defined(__FreeBSD__) || defined(__OpenBSD__)
 #include <unistd.h>
 #endif
 
@@ -64,11 +64,11 @@ static inline int DetectNumberOfWorkers() {
     return static_cast<int>(si.dwNumberOfProcessors);
 }
 
-#elif defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD__) || defined(__sun) 
+#elif defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD__) || defined(__sun) || defined(__OpenBSD__)
 static inline int DetectNumberOfWorkers() {
     long number_of_workers;
 
-#if (defined(__FreeBSD__) || defined(__sun)) && defined(_SC_NPROCESSORS_ONLN) 
+#if (defined(__FreeBSD__) || defined(__sun) || defined(__OpenBSD__)) && defined(_SC_NPROCESSORS_ONLN) 
     number_of_workers = sysconf(_SC_NPROCESSORS_ONLN);
 
 // In theory, sysconf should work everywhere.
