Merge topic 'cmake-host-system-name'

c1aaf8a6 Fix CMAKE_HOST_SYSTEM_NAME on SunOS

Source/cmStateSnapshot.cxx

@@ -308,7 +308,7 @@ void cmStateSnapshot::SetDefaultDefinitions()
   this->SetDefinition("CMAKE_HOST_UNIX", "1");
 
   struct utsname uts_name;
-  if (uname(&uts_name) == 0) {
+  if (uname(&uts_name) >= 0) {
     this->SetDefinition("CMAKE_HOST_SYSTEM_NAME", uts_name.sysname);
   }
 #endif