Index: lib/tsan/dd/CMakeLists.txt
===================================================================
--- lib/tsan/dd/CMakeLists.txt
+++ lib/tsan/dd/CMakeLists.txt
@@ -22,6 +22,12 @@
   dd_rtl.h
 )
 
+set(DD_LINKLIBS pthread)
+# There is no libdl on FreeBSD.
+if(NOT ${CMAKE_SYSTEM_NAME} MATCHES FreeBSD)
+  list(APPEND DD_LINKLIBS dl)
+endif()
+
 add_custom_target(dd)
 # Deadlock detector is currently supported on 64-bit Linux only.
 if(CAN_TARGET_x86_64 AND UNIX AND NOT APPLE AND NOT ANDROID)
@@ -43,7 +49,7 @@
             $<TARGET_OBJECTS:RTInterception.${arch}>
             $<TARGET_OBJECTS:RTSanitizerCommon.${arch}>
             $<TARGET_OBJECTS:RTSanitizerCommonLibc.${arch}>)
-  target_link_libraries(clang_rt.dyndd-${arch} pthread dl)
+  target_link_libraries(clang_rt.dyndd-${arch} ${DD_LINKLIBS})
 endif()
 
 add_dependencies(compiler-rt dd)