1// weak_undef_test_2.cc -- test handling of weak undefined symbols for gold
2
3// Copyright (C) 2014-2020 Free Software Foundation, Inc.
4// Written by Cary Coutant <ccoutant@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 tests that we correctly deal with weak undefined symbols
24// when searching archive libraries.  If we have a weak undefined symbol,
25// it should not cause us to link an archive library member that defines
26// that symbol.  However, if the symbol is also listed in a -u option on
27// the command line, it should cause the archive member to be linked.
28
29
30#include <cstdio>
31
32// This symbol is defined in weak_undef_file3.cc, but we should
33// not load it from the library.
34extern int weak_undef_1 __attribute__ ((weak));
35
36// This symbol is defined in weak_undef_file4.cc, but is also
37// listed in a -u option on the link command, so we should
38// load it from the library.
39extern int weak_undef_2 __attribute__ ((weak));
40
41int *p1 = &weak_undef_1;
42
43int *p2 = &weak_undef_2;
44
45int
46main()
47{
48  int status = 0;
49
50  if (&weak_undef_1 != NULL)
51    {
52      fprintf(stderr, "FAILED weak undef test 1: %s\n",
53              "&weak_undef_1 is not NULL");
54      status = 1;
55    }
56
57  if (&weak_undef_2 == NULL)
58    {
59      fprintf(stderr, "FAILED weak undef test 2: %s\n",
60              "&weak_undef_2 is NULL");
61      status = 1;
62    }
63
64  if (p1 != NULL)
65    {
66      fprintf(stderr, "FAILED weak undef test 3: %s\n",
67              "p1 is not NULL");
68      status = 1;
69    }
70
71  if (p2 == NULL)
72    {
73      fprintf(stderr, "FAILED weak undef test 4: %s\n",
74              "p2 is NULL");
75      status = 1;
76    }
77
78  return status;
79}
80