mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-15 04:31:49 +08:00
648c5cbbf3
During LTO, if (1) an IR file contains a COMDAT group that is kept, (2) a later non-claimed file contains the same group, which we discard, and (3) the plugin fails to provide a definition of the symbols in that COMDAT group, gold silently resolves any references to those symbols to 0. This patch adds a check for a placeholder symbol when deciding whether to issue an undefined symbol error. It also adds an extra note after any undefined placeholder symbol error that explains that a definition was expected from the plugin. gold/ PR gold/19842 * errors.cc (Errors::undefined_symbol): Add info message when symbol should have been provided by a plugin. * target-reloc.h (issue_undefined_symbol_error): Check for placeholder symbols defined in discarded sections. * testsuite/Makefile.am (plugin_test_9b): New test case. * testsuite/Makefile.in: Regenerate. * testsuite/plugin_test_9b_elf.cc: New test source file. * testsuite/plugin_test_9b_ir.cc: New test source file.
41 lines
1.1 KiB
C++
41 lines
1.1 KiB
C++
// plugin_test_9b_ir.cc -- a test case for gold plugins
|
|
|
|
// Copyright (C) 2016 Free Software Foundation, Inc.
|
|
// Written by Cary Coutant <ccoutant@gmail.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.
|
|
|
|
#include <iostream>
|
|
|
|
using namespace std;
|
|
|
|
class A {
|
|
public:
|
|
virtual void
|
|
print() __attribute__ ((noinline))
|
|
{ cout << "A::print" << endl; }
|
|
};
|
|
|
|
void
|
|
foo()
|
|
{
|
|
A a;
|
|
a.print();
|
|
cout << "foo returning" << endl;
|
|
}
|