Link thread library in simulator.

DRAMSys/simulator/CMakeLists.txt

@@ -41,6 +41,8 @@ project(DRAMSysSimulator)
 set(CMAKE_CXX_STANDARD 11 CACHE STRING "C++ Version")
 set(DCMAKE_SH="CMAKE_SH-NOTFOUND")
 
+find_package(Threads REQUIRED)
+
 add_executable(DRAMSys
     main.cpp
     ExampleInitiator.h
@@ -61,4 +63,5 @@ target_include_directories(DRAMSys
 
 target_link_libraries(DRAMSys
     PRIVATE DRAMSysLibrary
+    PRIVATE Threads::Threads
 )