我是一个相当新的 Freebsd 用户。当我尝试安装时gnu m4-1.4.18，我在 eval 测试部分得到 eval 失败：
Checking ./189.eval
@ ../doc/m4.texi:6405: Origin of test
./189.eval: stdout mismatch
--- m4-tmp.2536/m4-xout 2017-12-18 22:11:42.931036000 +0000
+++ m4-tmp.2536/m4-out 2017-12-18 22:11:42.928582000 +0000
@@ -2,8 +2,8 @@
1
1
-overflow occurred
--2147483648
+
+2147483648
0
-2
-2
这就是 189.eval 里面的内容：
dnl @ ../doc/m4.texi:6405: Origin of test
dnl @ expected status: 0
dnl @ extra options:
dnl @ Copyright (C) 2006, 2007, 2008, 2009 Free Software
dnl @ Foundation, Inc.
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(`max_int', eval(`0x7fffffff'))
dnl @result{}
define(`min_int', incr(max_int))
dnl @result{}
eval(min_int` < 0')
dnl @result{}1
eval(max_int` > 0')
dnl @result{}1
ifelse(eval(min_int` / -1'), min_int, `overflow occurred')
dnl @result{}overflow occurred
min_int
dnl @result{}-2147483648
eval(`0x80000000 % -1')
dnl @result{}0
eval(`-4 >> 1')
dnl @result{}-2
eval(`-4 >> 33')
dnl @result{}-2
只是为了让您知道它的新操作系统（安装）和它是我安装的第一个软件。