Autoconf cannot handle names of m4 builtins in AC_INIT's first argument correctly

[Stefano Lattarini]

Some examples:

  $ echo 'AC_INIT([sinclude], [1.0])' | autoconf -o/dev/null -
  stdin:1: warning: file `' included several times

  $ echo 'AC_INIT([dnl], [1.0])' | autoconf -o/dev/null -
  /usr/bin/m4:stdin:1: Warning: excess arguments to builtin `m4_define' ignored
  autom4te: /usr/bin/m4 failed with exit status: 1

  $ echo 'AC_INIT([changequote], [1.0]) [[AC_INIT]]' | autoconf -o/dev/null -
  /usr/bin/m4:stdin:1: recursion limit of 1024 exceeded, use -L<N> to change it
  autom4te: /usr/bin/m4 failed with exit status: 1

  $ echo 'AC_INIT([undivert], [1.0])' | autoconf -o/dev/null -
  stdin:1: error: undivert: missing argument
  stdin:1: the top level
  autom4te: /usr/bin/m4 failed with exit status: 1

Is this a bug, or merely a limitation that should be documented?

Regards,
  Stefano