1// weak_test.cc -- test handling of weak symbols for gold 2 3// Copyright (C) 2006-2020 Free Software Foundation, Inc. 4// Written by Ian Lance Taylor <iant@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 provides a set of test functions for TLS variables. The 24// functions are called by a main function in tls_test_main.cc. This 25// lets us test TLS access from a shared library. We currently don't 26// bother to test TLS access between two different files, on the 27// theory that that is no more complicated than ordinary variable 28// access between files. 29 30// We test that we correctly deal with weak symbols defined in 31// other libraries (in this case, libc). We need to make sure we 32// copy the associated GLOBAL reloc when we copy a WEAK reloc. 33 34 35#include <cstdio> 36 37int 38main() 39{ 40 extern char** environ; // defined in libc 41 if (environ == NULL) 42 { 43 fprintf(stderr, "FAILED the environ test: environ is NULL\n"); 44 return 1; 45 } 46 return 0; 47} 48