# Stores a list of subdirectories of directory ${curdir} into result.
macro(SUBDIRLIST result curdir)
  file(GLOB children RELATIVE ${curdir} ${curdir}/*)
  set(dirlist "")
  foreach( child ${children} )
    if( IS_DIRECTORY ${curdir}/${child} )
      list(APPEND dirlist ${child})
    endif()
  endforeach()
  set(${result} ${dirlist})
endmacro()

# Adds all subdirs of the current list directory.
macro(ADDALLSUBDIRS)
  SUBDIRLIST(subdirs ${CMAKE_CURRENT_SOURCE_DIR})
  foreach( subdir ${subdirs})
    add_subdirectory(${subdir})
  endforeach()
endmacro()