* elf32-spu.c (build_stub): Fix malloc under-allocation.
[binutils.git] / gold / testsuite / weak_undef_file1.cc
blobfd288704df8b4f5e426fb76749ba56ca343cf194
1 // weak_undef_file1.cc -- test handling of weak undefined symbols for gold
3 // Copyright 2008, 2010 Free Software Foundation, Inc.
4 // Written by Cary Coutant <ccoutant@google.com>.
6 // This file is part of gold.
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.
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.
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.
23 // We test that we correctly deal with weak undefined symbols.
24 // We need to make sure that the symbol is resolved to zero
25 // by the linker and that no dynamic relocation is generated.
27 // This source is used to build a shared library that defines
28 // an arbitrary symbol other than the weak undefined symbol
29 // referenced by the main program. The main program will be
30 // linked with this library so that the symbol remains undefined.
31 // Through the use of the embedded RPATH, the program will load
32 // an alternate shared library that does define the symbol,
33 // so that we can detect whether the symbol was left for runtime
34 // resolution.
36 #include <cstdio>
38 #include "weak_undef.h"
40 int is_such_symbol_ = 1;
42 // We also define a symbol that is not defined by the alternate
43 // library. The main program contains a weak reference to this
44 // symbol, and tests that the reference remains weak even after
45 // the definition was found at link time.
47 int link_time_only = 1;
49 extern int v2 __attribute__ ((weak));
51 int *v3 = &v2;
53 int
54 t1()
56 return is_such_symbol_;
59 // Test that a weak reference from a shared library to a symbol
60 // defined in the main program does get resolved.
62 int
63 t2()
65 return (&v2 == NULL) ? -1 : v2;
68 // Test that a weak reference from a shared library to a symbol
69 // defined in the main program does get resolved.
71 int
72 t3()
74 return (v3 == NULL) ? -1 : *v3;