1 dnl @ ../doc/m4.texi:6261: Origin of test
2 dnl @ expected status: 1
4 dnl @ Copyright (C) 2006, 2007, 2008, 2009 Free Software
6 dnl @ This file is free software; the Free Software Foundation
7 dnl @ gives unlimited permission to copy and/or distribute it
8 dnl @ with or without modifications, as long as this notice
11 dnl @error{}m4:stdin:1: Warning: recommend ==, not =, for equality operator
14 dnl @error{}m4:stdin:2: invalid operator in eval: ++0
17 dnl @error{}m4:stdin:3: invalid operator in eval: 0 |= 1