AC_FD_MSG macros undefined

[Alfred M. Szmidt]

      >    This is all the discussion is about.  The configure fragments
      >    must all be generated by the same autoconf version, since they
      >    are *fragments*, not standalone scripts.
      >
      > As I said, that isn't what the disucssion is about, I am talking
      > about standalone script.

      Please reread what I wrote.

   Yes, and it still isn't what I am talking about.

   It doesn't matter from what version of autoconf (say)
   sysdeps/i386/elf/configure.in got created, since it is only the
                             ^^^
s/\.in//

   _output_ that matters.  It gets sourced by [libc]/configure.in.  We
                                                              ^^^
Likewise...

   are not mixing autoconf code here, only shell script code that acts
   the same.