1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
// weak_undef_test_2.cc -- test handling of weak undefined symbols for gold
// Copyright (C) 2014-2017 Free Software Foundation, Inc.
// Written by Cary Coutant <ccoutant@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 tests that we correctly deal with weak undefined symbols
// when searching archive libraries. If we have a weak undefined symbol,
// it should not cause us to link an archive library member that defines
// that symbol. However, if the symbol is also listed in a -u option on
// the command line, it should cause the archive member to be linked.
#include <cstdio>
// This symbol is defined in weak_undef_file3.cc, but we should
// not load it from the library.
extern int weak_undef_1 __attribute__ ((weak));
// This symbol is defined in weak_undef_file4.cc, but is also
// listed in a -u option on the link command, so we should
// load it from the library.
extern int weak_undef_2 __attribute__ ((weak));
int *p1 = &weak_undef_1;
int *p2 = &weak_undef_2;
int
main()
{
int status = 0;
if (&weak_undef_1 != NULL)
{
fprintf(stderr, "FAILED weak undef test 1: %s\n",
"&weak_undef_1 is not NULL");
status = 1;
}
if (&weak_undef_2 == NULL)
{
fprintf(stderr, "FAILED weak undef test 2: %s\n",
"&weak_undef_2 is NULL");
status = 1;
}
if (p1 != NULL)
{
fprintf(stderr, "FAILED weak undef test 3: %s\n",
"p1 is not NULL");
status = 1;
}
if (p2 == NULL)
{
fprintf(stderr, "FAILED weak undef test 4: %s\n",
"p2 is NULL");
status = 1;
}
return status;
}
|
