gold/testsuite/undef_symbol.cc

   1 // undef_symbol.cc -- a test case for undefined references
   2
   3 // Copyright (C) 2007-2021 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:
  31   Foo()
  32     : a_(a)
  33   { }
  34   int get_a()
  35   { return a_; }
  36  private:
  37   int a_;
  38 };
  39
  40 static Foo foo;