cmake_minimum_required(VERSION 2.8)

project(include_before)

include_directories(adir)
include_directories(BEFORE bdir)

get_property(dirs DIRECTORY PROPERTY INCLUDE_DIRECTORIES)
message(STATUS "include directories: ${dirs}")
list(FIND dirs "${CMAKE_CURRENT_SOURCE_DIR}/bdir" blocation)
if(NOT blocation EQUAL 0)
  message(FATAL_ERROR "bdir did not come first")
endif()