dnl @ ../doc/m4.texinfo:2225: Origin of test
dnl @ Copyright (C) 2006 Free Software Foundation
dnl @ This file is free software; the Free Software Foundation
dnl @ gives unlimited permission to copy and/or distribute it
dnl @ with or without modifications, as long as this notice
dnl @ is preserved.
define(`foo', `FOO')
dnl @result{}
traceon(`foo')
dnl @result{}
debugmode()
dnl @result{}
foo
dnl @error{}m4trace: -1- foo -> `FOO'
dnl @result{}FOO
debugmode
dnl @result{}
foo
dnl @error{}m4trace: -1- foo
dnl @result{}FOO
debugmode(`+l')
dnl @result{}
foo
dnl @error{}m4trace:8: -1- foo
dnl @result{}FOO