[PATCH] Add clang headers that fix machine-dependent definitions on FreeBSD 9.2

[Viktor Kutuzov]

One more thing to check. If you add a tracing message() line to the copying loop, like this:

  set(out_files)
  foreach( f ${files} )
    set( src ${CMAKE_CURRENT_SOURCE_DIR}/${f} )
    set( dst ${output_dir}/${f} )
    message( "'${src}' -> '${dst}'" )
    add_custom_command(OUTPUT ${dst}
      DEPENDS ${src}
      COMMAND ${CMAKE_COMMAND} -E copy_if_different ${src} ${dst}
      COMMENT "Copying clang's ${f}...")
    list(APPEND out_files ${dst})
  endforeach( f )

what does it print for your config?

http://reviews.llvm.org/D3908