binutils-gdb/gold/testsuite/undef_symbol.cc

// undef_symbol.cc -- a test case for undefined references

// Copyright (C) 2007-2022 Free Software Foundation, Inc.
// Written by Ian Lance Taylor <iant@google.com>.

// This file is part of gold.

// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
// MA 02110-1301, USA.

// This file is constructed to have an undefined reference to the
// global variable a.  We should get an error when we link.

extern int a;

class Foo
{
 public:
  Foo()
    : a_(a)
  { }
  int get_a()
  { return a_; }
 private:
  int a_;
};

static Foo foo;