| | 1 | # =========================================================================== |
| | 2 | # http://www.gnu.org/software/autoconf-archive/ax_tls.html |
| | 3 | # =========================================================================== |
| | 4 | # |
| | 5 | # SYNOPSIS |
| | 6 | # |
| | 7 | # AX_TLS([action-if-found], [action-if-not-found]) |
| | 8 | # |
| | 9 | # DESCRIPTION |
| | 10 | # |
| | 11 | # Provides a test for the compiler support of thread local storage (TLS) |
| | 12 | # extensions. Defines TLS if it is found. Currently knows about GCC/ICC |
| | 13 | # and MSVC. I think SunPro uses the same as GCC, and Borland apparently |
| | 14 | # supports either. |
| | 15 | # |
| | 16 | # LICENSE |
| | 17 | # |
| | 18 | # Copyright (c) 2008 Alan Woodland <ajw05@aber.ac.uk> |
| | 19 | # Copyright (c) 2010 Diego Elio Petteno` <flameeyes@gmail.com> |
| | 20 | # |
| | 21 | # This program is free software: you can redistribute it and/or modify it |
| | 22 | # under the terms of the GNU General Public License as published by the |
| | 23 | # Free Software Foundation, either version 3 of the License, or (at your |
| | 24 | # option) any later version. |
| | 25 | # |
| | 26 | # This program is distributed in the hope that it will be useful, but |
| | 27 | # WITHOUT ANY WARRANTY; without even the implied warranty of |
| | 28 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
| | 29 | # Public License for more details. |
| | 30 | # |
| | 31 | # You should have received a copy of the GNU General Public License along |
| | 32 | # with this program. If not, see <http://www.gnu.org/licenses/>. |
| | 33 | # |
| | 34 | # As a special exception, the respective Autoconf Macro's copyright owner |
| | 35 | # gives unlimited permission to copy, distribute and modify the configure |
| | 36 | # scripts that are the output of Autoconf when processing the Macro. You |
| | 37 | # need not follow the terms of the GNU General Public License when using |
| | 38 | # or distributing such scripts, even though portions of the text of the |
| | 39 | # Macro appear in them. The GNU General Public License (GPL) does govern |
| | 40 | # all other use of the material that constitutes the Autoconf Macro. |
| | 41 | # |
| | 42 | # This special exception to the GPL applies to versions of the Autoconf |
| | 43 | # Macro released by the Autoconf Archive. When you make and distribute a |
| | 44 | # modified version of the Autoconf Macro, you may extend this special |
| | 45 | # exception to the GPL to apply to your modified version as well. |
| | 46 | |
| | 47 | #serial 10 |
| | 48 | |
| | 49 | AC_DEFUN([AX_TLS], [ |
| | 50 | AC_MSG_CHECKING(for thread local storage (TLS) class) |
| | 51 | AC_CACHE_VAL(ac_cv_tls, [ |
| | 52 | ax_tls_keywords="__thread __declspec(thread) none" |
| | 53 | for ax_tls_keyword in $ax_tls_keywords; do |
| | 54 | AS_CASE([$ax_tls_keyword], |
| | 55 | [none], [ac_cv_tls=none ; break], |
| | 56 | [AC_TRY_COMPILE( |
| | 57 | [#include <stdlib.h> |
| | 58 | static void |
| | 59 | foo(void) { |
| | 60 | static ] $ax_tls_keyword [ int bar; |
| | 61 | exit(1); |
| | 62 | }], |
| | 63 | [], |
| | 64 | [ac_cv_tls=$ax_tls_keyword ; break], |
| | 65 | ac_cv_tls=none |
| | 66 | )]) |
| | 67 | done |
| | 68 | ]) |
| | 69 | AC_MSG_RESULT($ac_cv_tls) |
| | 70 | |
| | 71 | AS_IF([test "$ac_cv_tls" != "none"], |
| | 72 | AC_DEFINE_UNQUOTED([TLS], $ac_cv_tls, [If the compiler supports a TLS storage class define it to that here]) |
| | 73 | m4_ifnblank([$1], [$1]), |
| | 74 | m4_ifnblank([$2], [$2]) |
| | 75 | ) |
| | 76 | ]) |
projects / urcu.git / blame_incremental