Update CMakeLists.txt

Author: Gogoshika-ga

CMakeLists.txt

@@ -200,7 +200,7 @@ elseif(LINUX)
     if (CMAKE_CXX_COMPILER MATCHES "clang")
         message(STATUS "Detected Clang compiler: ${CMAKE_CXX_COMPILER}")
         set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libc++")
-        set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -lc -lc++abi -ldl")
+        set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -lc -lc++abi -ldl -lpthread")
     endif()
 
 endif()