$OpenBSD$

Index: CMakeLists.txt
--- CMakeLists.txt.orig
+++ CMakeLists.txt
@@ -187,7 +187,7 @@ else()
     if (CMAKE_SYSTEM_NAME STREQUAL FreeBSD)
         set(EXTRA_LIBS kvm pthread)
     else()
-        set(EXTRA_LIBS pthread rt dl)
+        set(EXTRA_LIBS pthread)
     endif()
 endif()