Added check for minimum compiler version

    set( EXECUTABLE_OUTPUT_PATH ${PROJECT_SOURCE_DIR}/Release/bin )

endif()

# check if the compiler is good enough

if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")

   # GCC 5.0 is the first release with full C++11 support (due to libstdc++)

   # https://gcc.gnu.org/gcc-5/changes.html

   if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS "5.0")

      message(FATAL_ERROR "Insufficient GCC version")

   endif()

elseif(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")

   # Clang 3.4 has full C++14 support: http://clang.llvm.org/cxx_status.html

   if(CMAKE_CXX_COMPILER_VERSION VERSION_LESS "3.4")

      message(FATAL_ERROR "Insufficient Clang version")

   endif()

endif()

# set Debug/Release options

set( CMAKE_CXX_FLAGS "-std=c++11 -pthread -Wall -Wno-unused-local-typedefs -Wno-unused-variable" )

set( CMAKE_CXX_FLAGS_DEBUG "-g" )