AC_CONFIG_COMMANDS is over-quoting its first argument?

[Akim Demaille]

Hi!

I fell on this while writing a macro wrapping AC_CONFIG_COMMANDS.
This is 2.69.  I have not seen indications in the documentation
that the first argument must be 'a literal'.

$ cat configure.ac
AC_INIT
AC_CONFIG_COMMANDS([m4_default([], [foo])], [echo foo])
AC_OUTPUT
$ autoconf
$ ./configure
configure: creating ./config.status
./config.status: line 510: syntax error near unexpected token 
`CONFIG_COMMANDS="$CONFIG_COMMANDS "'
./config.status: line 510: `    "" CONFIG_COMMANDS="$CONFIG_COMMANDS " ;;'

config.status looks like this:

   506  # Handling of arguments.
   507  for ac_config_target in $ac_config_targets
   508  do
   509    case $ac_config_target in
   510      "" CONFIG_COMMANDS="$CONFIG_COMMANDS " ;;
   511      "foo") CONFIG_COMMANDS="$CONFIG_COMMANDS foo)" ;;
   512  
   513    *) as_fn_error $? "invalid argument: \`$ac_config_target'" "$LINENO" 
5;;
   514    esac
   515  done

I guess the other AC_CONFIG_* have the same issue.

Cheers!