--- runtime/CMakeLists.txt.orig	2020-07-13 17:43:03 UTC
+++ runtime/CMakeLists.txt
@@ -134,6 +134,8 @@ if("${C_SYSTEM_LIBS}" STREQUAL "AUTO")
         set(C_SYSTEM_LIBS m c)
     elseif("${TARGET_SYSTEM}" MATCHES "Linux")
         set(C_SYSTEM_LIBS m pthread rt dl)
+    elseif("${TARGET_SYSTEM}" MATCHES "FreeBSD")
+        set(C_SYSTEM_LIBS m pthread execinfo)
     else()
         set(C_SYSTEM_LIBS m pthread)
     endif()