--- CMakeLists.txt.orig	2017-09-14 09:28:17 UTC
+++ CMakeLists.txt
@@ -24,6 +24,8 @@ if (CMAKE_SYSTEM_NAME STREQUAL Linux)
     set(LINUX TRUE)
 elseif (CMAKE_SYSTEM_NAME STREQUAL Darwin)
     set(MACOSX TRUE)
+elseif (CMAKE_SYSTEM_NAME STREQUAL FreeBSD)
+    set(FREEBSD TRUE)
 else ()
     Message (FATAL_ERROR "${CMAKE_SYSTEM_NAME} not supported; Must be Linux or Darwin")
 endif()