| /* ABI compatibility for 'system' symbol in libpthread ABI. |
| Copyright (C) 2002-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library 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 |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <stdlib.h> |
| #include <shlib-compat.h> |
| |
| /* libpthread once had its own 'system', though there was no apparent |
| reason for it. There is no use in having a separate symbol in |
| libpthread, but the historical ABI requires it. For static linking, |
| there is no need to provide anything here--the libc version will be |
| linked in. For shared library ABI compatibility, there must be a |
| 'system' symbol in libpthread.so. |
| |
| With an IFUNC resolver, it would be possible to avoid the indirection, |
| but the IFUNC resolver might run before the __libc_system symbol has |
| been relocated, in which case the IFUNC resolver would not be able to |
| provide the correct address. */ |
| |
| #if SHLIB_COMPAT (libpthread, GLIBC_2_0, GLIBC_2_22) |
| |
| static int __attribute__ ((used)) |
| system_compat (const char *line) |
| { |
| return __libc_system (line); |
| } |
| strong_alias (system_compat, system_alias) |
| compat_symbol (libpthread, system_alias, system, GLIBC_2_0); |
| |
| #endif |
