cmake: Print compiler and linker flags in summary

CMakeLists.txt

@@ -78,6 +78,8 @@ message("\n")
 message("Configure summary")
 message("=================")
 message("C++ compiler .......................... ${CMAKE_CXX_COMPILER_ID} ${CMAKE_CXX_COMPILER_VERSION}, ${CMAKE_CXX_COMPILER}")
+include(FlagsSummary)
+flags_summary()
 message("\n")
 if(configure_warnings)
     message("  ******\n")