1 // weak_undef_test_2.cc -- test handling of weak undefined symbols for gold
2
3 // Copyright (C) 2014-2016 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.
34 extern 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.
39 extern int weak_undef_2 __attribute__ ((weak));
40
41 int *p1 = &weak_undef_1;
42
43 int *p2 = &weak_undef_2;
44
45 int
main()46 main()
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