mirror of
https://github.com/jedisct1/libsodium.git
synced 2024-12-24 20:45:17 -07:00
75 lines
3.0 KiB
Plaintext
75 lines
3.0 KiB
Plaintext
# ===========================================================================
|
|
# https://www.gnu.org/software/autoconf-archive/ax_tls.html
|
|
# ===========================================================================
|
|
#
|
|
# SYNOPSIS
|
|
#
|
|
# AX_TLS([action-if-found], [action-if-not-found])
|
|
#
|
|
# DESCRIPTION
|
|
#
|
|
# Provides a test for the compiler support of thread local storage (TLS)
|
|
# extensions. Defines TLS if it is found. Currently knows about C++11,
|
|
# GCC/ICC, and MSVC. I think SunPro uses the same as GCC, and Borland
|
|
# apparently supports either.
|
|
#
|
|
# LICENSE
|
|
#
|
|
# Copyright (c) 2008 Alan Woodland <ajw05@aber.ac.uk>
|
|
# Copyright (c) 2010 Diego Elio Petteno` <flameeyes@gmail.com>
|
|
#
|
|
# 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, see <https://www.gnu.org/licenses/>.
|
|
#
|
|
# As a special exception, the respective Autoconf Macro's copyright owner
|
|
# gives unlimited permission to copy, distribute and modify the configure
|
|
# scripts that are the output of Autoconf when processing the Macro. You
|
|
# need not follow the terms of the GNU General Public License when using
|
|
# or distributing such scripts, even though portions of the text of the
|
|
# Macro appear in them. The GNU General Public License (GPL) does govern
|
|
# all other use of the material that constitutes the Autoconf Macro.
|
|
#
|
|
# This special exception to the GPL applies to versions of the Autoconf
|
|
# Macro released by the Autoconf Archive. When you make and distribute a
|
|
# modified version of the Autoconf Macro, you may extend this special
|
|
# exception to the GPL to apply to your modified version as well.
|
|
|
|
#serial 14
|
|
|
|
AC_DEFUN([AX_TLS], [
|
|
AC_MSG_CHECKING([for thread local storage (TLS) class])
|
|
AC_CACHE_VAL([ac_cv_tls],
|
|
[for ax_tls_keyword in thread_local _Thread_local __thread '__declspec(thread)' none; do
|
|
AS_CASE([$ax_tls_keyword],
|
|
[none], [ac_cv_tls=none ; break],
|
|
[AC_TRY_COMPILE(
|
|
[#include <stdlib.h>
|
|
static void
|
|
foo(void) {
|
|
static ] $ax_tls_keyword [ int bar;
|
|
exit(1);
|
|
}],
|
|
[],
|
|
[ac_cv_tls=$ax_tls_keyword ; break],
|
|
ac_cv_tls=none
|
|
)])
|
|
done
|
|
])
|
|
AC_MSG_RESULT([$ac_cv_tls])
|
|
|
|
AS_IF([test "$ac_cv_tls" != "none"],
|
|
[AC_DEFINE_UNQUOTED([TLS],[$ac_cv_tls],[If the compiler supports a TLS storage class define it to that here])
|
|
m4_ifnblank([$1],[$1])],
|
|
[m4_ifnblank([$2],[$2])])
|
|
])
|