1 // undef_symbol.cc -- a test case for undefined references
2 
3 // Copyright (C) 2007-2016 Free Software Foundation, Inc.
4 // Written by Ian Lance Taylor <iant@google.com>.
5 
6 // This file is part of gold.
7 
8 // This program is free software; you can redistribute it and/or modify
9 // it under the terms of the GNU General Public License as published by
10 // the Free Software Foundation; either version 3 of the License, or
11 // (at your option) any later version.
12 
13 // This program is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 // GNU General Public License for more details.
17 
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the Free Software
20 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 // MA 02110-1301, USA.
22 
23 // This file is constructed to have an undefined reference to the
24 // global variable a.  We should get an error when we link.
25 
26 extern int a;
27 
28 class Foo
29 {
30  public:
Foo()31   Foo()
32     : a_(a)
33   { }
get_a()34   int get_a()
35   { return a_; }
36  private:
37   int a_;
38 };
39 
40 static Foo foo;
41