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cmake_minimum_required(VERSION 3.7)

macro(subdir_list result curdir)
  file(GLOB children RELATIVE ${curdir} ${curdir}/*)
  set(dirlist "")
  foreach (child ${children})
    if (IS_DIRECTORY ${curdir}/${child})
        set(dirlist ${dirlist} ${child})
    endif ()
  endforeach ()
  set(${result} ${dirlist})
endmacro()

subdir_list(SUBDIRS ${CMAKE_CURRENT_SOURCE_DIR})

foreach (subdir ${SUBDIRS})
    add_subdirectory(${subdir})
endforeach ()
