add OpenBSD support

common/math/math.h

@@ -169,6 +169,7 @@ namespace embree
 
   __forceinline      int min(int      a, int      b) { return a<b ? a:b; }
   __forceinline unsigned min(unsigned a, unsigned b) { return a<b ? a:b; }
+  __forceinline     long min(long     a, long     b) { return a<b ? a:b; }
   __forceinline  int64_t min(int64_t  a, int64_t  b) { return a<b ? a:b; }
   __forceinline    float min(float    a, float    b) { return a<b ? a:b; }
   __forceinline   double min(double   a, double   b) { return a<b ? a:b; }
@@ -189,6 +190,7 @@ namespace embree
 
   __forceinline      int max(int      a, int      b) { return a<b ? b:a; }
   __forceinline unsigned max(unsigned a, unsigned b) { return a<b ? b:a; }
+  __forceinline     long max(long     a, long     b) { return a<b ? b:a; }
   __forceinline  int64_t max(int64_t  a, int64_t  b) { return a<b ? b:a; }
   __forceinline    float max(float    a, float    b) { return a<b ? b:a; }
   __forceinline   double max(double   a, double   b) { return a<b ? b:a; }

common/sys/sysinfo.cpp

@@ -574,6 +574,29 @@ namespace embree
 
 #endif
 
+////////////////////////////////////////////////////////////////////////////////
+/// OpenBSD Platform
+////////////////////////////////////////////////////////////////////////////////
+
+#if defined(__OpenBSD__)
+namespace embree
+{
+  std::string getExecutableFileName()
+  {
+    /* not possible on OpenBSD.  if you need it, save argv[0] */
+    return "";
+  }
+
+  size_t getVirtualMemoryBytes() {
+    return 0;
+  }
+
+  size_t getResidentMemoryBytes() {
+    return 0;
+  }
+}
+#endif
+
 ////////////////////////////////////////////////////////////////////////////////
 /// Mac OS X Platform
 ////////////////////////////////////////////////////////////////////////////////
@@ -626,7 +649,7 @@ namespace embree
     static int nThreads = -1;
     if (nThreads != -1) return nThreads;
 
-#if defined(__MACOSX__) || defined(__ANDROID__)
+#if defined(__MACOSX__) || defined(__ANDROID__) || defined(__OpenBSD__)
     nThreads = sysconf(_SC_NPROCESSORS_ONLN); // does not work in Linux LXC container
     assert(nThreads);
 #elif defined(__EMSCRIPTEN__)