check Boost version with 'find_package()'

CMakeLists.txt

@@ -126,18 +126,12 @@ if (USE_STATIC_LIBRARIES)
 endif ()
 set (Boost_USE_MULTITHREADED OFF)
 set (Boost_USE_STATIC_RUNTIME OFF)
-find_package (Boost
+find_package (Boost 1.60.0
     REQUIRED COMPONENTS chrono filesystem iostreams regex serialization system timer)
-if (Boost_INCLUDE_DIRS)
-    if (${Boost_VERSION} VERSION_LESS 106000)
-	message (FATAL_ERROR
-	       "Found Boost library is too old; required is version 1.60.0 or newer!")
-    endif ()
-    message ("Found Boost include dir: ${Boost_INCLUDE_DIR}")
-    message ("Found Boost library dir: ${Boost_LIBRARY_DIR}")
-    message ("Found Boost libraries: ${Boost_LIBRARIES}")
-    include_directories (${Boost_INCLUDE_DIRS})
-endif ()
+message ("Found Boost include dir: ${Boost_INCLUDE_DIR}")
+message ("Found Boost library dir: ${Boost_LIBRARY_DIR}")
+message ("Found Boost libraries: ${Boost_LIBRARIES}")
+include_directories (${Boost_INCLUDE_DIRS})
 
 option (ENABLE_DKS "Enable DKS" OFF)
 if (ENABLE_DKS)