fixed tests cmake thread flag

tests/CMakeLists.txt

@@ -4,21 +4,16 @@
 
 enable_testing()
 
+find_package(Threads)
+
 # Build Catch unit tests
 add_library(catch INTERFACE)
 target_include_directories(catch INTERFACE ${CMAKE_CURRENT_SOURCE_DIR})
 
 file(GLOB catch_tests LIST_DIRECTORIES false RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} *.cpp)
 
-if (CMAKE_COMPILER_IS_GNUCXX)
-  set ( CMAKE_CXX_FLAGS "--std=c++11 -pthread")  
-  set ( CMAKE_EXE_LIKKER_FLAGS "-pthread")  
-endif ()
-
 add_executable(catch_tests ${catch_tests})
-target_link_libraries(catch_tests spdlog)
+target_link_libraries(catch_tests spdlog ${CMAKE_THREAD_LIBS_INIT})
 add_test(NAME catch_tests COMMAND catch_tests)
 file(MAKE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/logs")
 
-
-