| dnl |
| dnl Copyright (c) Linux Test Project, 2016 |
| dnl |
| dnl This program is free software; you can redistribute it and/or modify |
| dnl it under the terms of the GNU General Public License as published by |
| dnl the Free Software Foundation; either version 2 of the License, or |
| dnl (at your option) any later version. |
| dnl |
| dnl This program is distributed in the hope that it will be useful, |
| dnl but WITHOUT ANY WARRANTY; without even the implied warranty of |
| dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| dnl the GNU General Public License for more details. |
| dnl |
| |
| AC_DEFUN([LTP_CHECK_ATOMIC_MEMORY_MODEL],[dnl |
| AC_MSG_CHECKING([for __atomic_* compiler builtins]) |
| AC_LINK_IFELSE([AC_LANG_SOURCE([ |
| int main(void) { |
| int i = 0, j = 0; |
| __atomic_add_fetch(&i, 1, __ATOMIC_ACQ_REL); |
| __atomic_load_n(&i, __ATOMIC_SEQ_CST); |
| __atomic_store_n(&i, 0, __ATOMIC_RELAXED); |
| return i; |
| }])],[has_atomic_mm="yes"]) |
| |
| if test "x$has_atomic_mm" = xyes; then |
| AC_DEFINE(HAVE_ATOMIC_MEMORY_MODEL,1, |
| [Define to 1 if you have the __atomic_* compiler builtins]) |
| AC_MSG_RESULT(yes) |
| else |
| AC_MSG_RESULT(no) |
| fi |
| ]) |
