configure: error: Emacs cannot be built or installed in a
  directory whose name contains non-ASCII characters:
  /usr/pkgsrc/wip/emacs-current/work/emacs

*** Error code 1

Seems to me false warning, all are ASCII chars. I just disabled these line, and let me try (again).

   4196 #for var in "`pwd`" "$temp_srcdir"; do
   4197 #       echo $var
   4198 #    case "$var" in
   4199 #    *[^\ -~]*) as_fn_error $? 
        "Emacs cannot be built in a directory whose name contains non-ASCII characters: 
          $var" "$LINENO" 5 ;;
   4200 #  esac
   4201 #
   4202 #done