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a09e091a JB |
1 | dnl Copyright © 2011 Apple Inc. |
2 | dnl | |
3 | dnl Permission is hereby granted, free of charge, to any person obtaining a | |
4 | dnl copy of this software and associated documentation files (the "Software"), | |
5 | dnl to deal in the Software without restriction, including without limitation | |
6 | dnl the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
7 | dnl and/or sell copies of the Software, and to permit persons to whom the | |
8 | dnl Software is furnished to do so, subject to the following conditions: | |
9 | dnl | |
10 | dnl The above copyright notice and this permission notice (including the next | |
11 | dnl paragraph) shall be included in all copies or substantial portions of the | |
12 | dnl Software. | |
13 | dnl | |
14 | dnl THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
15 | dnl IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
16 | dnl FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
17 | dnl THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
18 | dnl LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
19 | dnl FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | |
20 | dnl DEALINGS IN THE SOFTWARE. | |
21 | dnl | |
22 | dnl Authors: Jeremy Huddleston <jeremyhu@apple.com> | |
23 | ||
24 | AC_DEFUN([XORG_TLS], [ | |
25 | AC_REQUIRE([XORG_STRICT_OPTION]) | |
26 | AC_MSG_CHECKING(for thread local storage (TLS) support) | |
27 | AC_CACHE_VAL(ac_cv_tls, [ | |
28 | ac_cv_tls=none | |
29 | keywords="__thread __declspec(thread)" | |
30 | for kw in $keywords ; do | |
31 | AC_TRY_COMPILE([int $kw test;], [], ac_cv_tls=$kw ; break ;) | |
32 | done | |
33 | ]) | |
34 | AC_MSG_RESULT($ac_cv_tls) | |
35 | ||
36 | if test "$ac_cv_tls" != "none"; then | |
37 | AC_MSG_CHECKING(for tls_model attribute support) | |
38 | AC_CACHE_VAL(ac_cv_tls_model, [ | |
39 | save_CFLAGS="$CFLAGS" | |
40 | CFLAGS="$CFLAGS $STRICT_CFLAGS" | |
41 | AC_TRY_COMPILE([int $ac_cv_tls __attribute__((tls_model("initial-exec"))) test;], [], | |
42 | ac_cv_tls_model=yes, ac_cv_tls_model=no) | |
43 | CFLAGS="$save_CFLAGS" | |
44 | ]) | |
45 | AC_MSG_RESULT($ac_cv_tls_model) | |
46 | ||
47 | if test "x$ac_cv_tls_model" = "xyes" ; then | |
48 | xorg_tls=$ac_cv_tls' __attribute__((tls_model("initial-exec")))' | |
49 | else | |
50 | xorg_tls=$ac_cv_tls | |
51 | fi | |
52 | ||
53 | AC_DEFINE_UNQUOTED([TLS], $xorg_tls, [The compiler supported TLS storage class, prefering initial-exec if tls_model is supported]) | |
54 | fi | |
55 | ]) |