dnl Copyright © 2011 Apple Inc. dnl dnl Permission is hereby granted, free of charge, to any person obtaining a dnl copy of this software and associated documentation files (the "Software"), dnl to deal in the Software without restriction, including without limitation dnl the rights to use, copy, modify, merge, publish, distribute, sublicense, dnl and/or sell copies of the Software, and to permit persons to whom the dnl Software is furnished to do so, subject to the following conditions: dnl dnl The above copyright notice and this permission notice (including the next dnl paragraph) shall be included in all copies or substantial portions of the dnl Software. dnl dnl THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR dnl IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, dnl FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL dnl THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER dnl LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING dnl FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER dnl DEALINGS IN THE SOFTWARE. dnl dnl Authors: Jeremy Huddleston <jeremyhu@apple.com> AC_DEFUN([XORG_TLS], [ AC_REQUIRE([XORG_STRICT_OPTION]) AC_MSG_CHECKING(for thread local storage (TLS) support) AC_CACHE_VAL(ac_cv_tls, [ ac_cv_tls=none keywords="__thread __declspec(thread)" for kw in $keywords ; do AC_TRY_COMPILE([int $kw test;], [], ac_cv_tls=$kw) done ]) AC_MSG_RESULT($ac_cv_tls) if test "$ac_cv_tls" != "none"; then AC_MSG_CHECKING(for tls_model attribute support) AC_CACHE_VAL(ac_cv_tls_model, [ save_CFLAGS="$CFLAGS" CFLAGS="$CFLAGS $STRICT_CFLAGS" AC_TRY_COMPILE([int $ac_cv_tls __attribute__((tls_model("initial-exec"))) test;], [], ac_cv_tls_model=yes, ac_cv_tls_model=no) CFLAGS="$save_CFLAGS" ]) AC_MSG_RESULT($ac_cv_tls_model) if test "x$ac_cv_tls_model" = "xyes" ; then xorg_tls=$ac_cv_tls' __attribute__((tls_model("initial-exec")))' else xorg_tls=$ac_cv_tls fi AC_DEFINE_UNQUOTED([TLS], $xorg_tls, [The compiler supported TLS storage class, prefering initial-exec if tls_model is supported]) fi ])