93 lines
3.3 KiB
Text
93 lines
3.3 KiB
Text
|
# ===========================================================================
|
||
|
|
# http://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 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 <http://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 11
|
||
|
|
|
||
|
|
# Define m4_ifblank and m4_ifnblank macros from introduced in
|
||
|
|
# autotools 2.64 m4sugar.m4 if using an earlier autotools.
|
||
|
|
|
||
|
|
ifdef([m4_ifblank], [], [
|
||
|
|
m4_define([m4_ifblank],
|
||
|
|
[m4_if(m4_translit([[$1]], [ ][ ][
|
||
|
|
]), [], [$2], [$3])])
|
||
|
|
])
|
||
|
|
|
||
|
|
|
||
|
|
ifdef([m4_ifnblank], [], [
|
||
|
|
m4_define([m4_ifnblank],
|
||
|
|
[m4_if(m4_translit([[$1]], [ ][ ][
|
||
|
|
]), [], [$3], [$2])])
|
||
|
|
])
|
||
|
|
|
||
|
|
AC_DEFUN([AX_TLS], [
|
||
|
|
AC_MSG_CHECKING(for thread local storage (TLS) class)
|
||
|
|
AC_CACHE_VAL(ac_cv_tls, [
|
||
|
|
ax_tls_keywords="__thread __declspec(thread) none"
|
||
|
|
for ax_tls_keyword in $ax_tls_keywords; do
|
||
|
|
AS_CASE([$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])
|
||
|
|
)
|
||
|
|
])
|