93393411e3
This adds an AX_TLS macro which attempts to identify if the underlying compiler/platform supports thread local storage (TLS). The macro comes from the autoconf macro archive. Signed-off-by: Tom Fogal <tfogal@alumni.unh.edu> Reviewed-by: Dan Nicholson <dbn.lists@gmail.com>
75 lines
2.9 KiB
Plaintext
75 lines
2.9 KiB
Plaintext
# ===========================================================================
|
|
# http://www.nongnu.org/autoconf-archive/ax_tls.html
|
|
# ===========================================================================
|
|
#
|
|
# SYNOPSIS
|
|
#
|
|
# AX_TLS
|
|
#
|
|
# DESCRIPTION
|
|
#
|
|
# Provides a test for the compiler support of thread local storage (TLS)
|
|
# extensions. Defines TLS if it is found. Currently only knows about GCC
|
|
# 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>
|
|
#
|
|
# 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.
|
|
|
|
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
|
|
case $ax_tls_keyword in
|
|
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
|
|
)
|
|
esac
|
|
done
|
|
])
|
|
|
|
if test "$ac_cv_tls" != "none"; then
|
|
dnl AC_DEFINE([TLS], [], [If the compiler supports a TLS storage class define it to that here])
|
|
AC_DEFINE_UNQUOTED([TLS], $ac_cv_tls, [If the compiler supports a TLS storage class define it to that here])
|
|
fi
|
|
AC_MSG_RESULT($ac_cv_tls)
|
|
])
|