1dnl Copyright (c) 2008 The NetBSD Foundation, Inc.
2dnl All rights reserved.
3dnl
4dnl Redistribution and use in source and binary forms, with or without
5dnl modification, are permitted provided that the following conditions
6dnl are met:
7dnl 1. Redistributions of source code must retain the above copyright
8dnl    notice, this list of conditions and the following disclaimer.
9dnl 2. Redistributions in binary form must reproduce the above copyright
10dnl    notice, this list of conditions and the following disclaimer in the
11dnl    documentation and/or other materials provided with the distribution.
12dnl
13dnl THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND
14dnl CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
15dnl INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
16dnl MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17dnl IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY
18dnl DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19dnl DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
20dnl GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
21dnl INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
22dnl IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
23dnl OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
24dnl IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25
26AC_DEFUN([ATF_ATTRIBUTE_FORMAT_PRINTF], [
27    AC_MSG_CHECKING(
28        [whether __attribute__((__format__(__printf__, a, b))) is supported])
29    AC_COMPILE_IFELSE(
30        [AC_LANG_PROGRAM([
31#include <stdarg.h>
32#include <stdio.h>
33
34static void test_printf(const char *, ...)
35    __attribute__((__format__(__printf__, 1, 2)));
36
37static void
38test_printf(const char *format, ...)
39{
40    va_list ap;
41
42    va_start(ap, format);
43    vprintf(format, ap);
44    va_end(ap);
45}], [
46    test_printf("foo %s", "bar");
47    return 0;
48])],
49        [AC_MSG_RESULT(yes)
50         value="__attribute__((__format__(__printf__, a, b)))"],
51        [AC_MSG_RESULT(no)
52         value=""]
53    )
54    AC_SUBST([ATTRIBUTE_FORMAT_PRINTF], [${value}])
55])
56
57AC_DEFUN([ATF_ATTRIBUTE_NORETURN], [
58    dnl XXX This check is overly simple and should be fixed.  For example,
59    dnl Sun's cc does support the noreturn attribute but CC (the C++
60    dnl compiler) does not.  And in that case, CC just raises a warning
61    dnl during compilation, not an error, which later breaks the
62    dnl atf-c++/t_pkg_config:cxx_build check.
63    AC_CACHE_CHECK(
64        [whether __attribute__((__noreturn__)) is supported],
65        [kyua_cv_attribute_noreturn], [
66        AC_RUN_IFELSE(
67            [AC_LANG_PROGRAM([], [
68#if ((__GNUC__ == 2 && __GNUC_MINOR__ >= 5) || __GNUC__ > 2)
69    return 0;
70#else
71    return 1;
72#endif
73])],
74        [kyua_cv_attribute_noreturn=yes],
75        [kyua_cv_attribute_noreturn=no])
76    ])
77    if test x"${kyua_cv_attribute_noreturn}" = xyes; then
78        value="__attribute__((__noreturn__))"
79    else
80        value=""
81    fi
82    AC_SUBST([ATTRIBUTE_NORETURN], [${value}])
83])
84
85AC_DEFUN([ATF_ATTRIBUTE_UNUSED], [
86    AC_MSG_CHECKING(whether __attribute__((__unused__)) is supported)
87    AC_COMPILE_IFELSE(
88        [AC_LANG_PROGRAM([
89static void
90function(int a __attribute__((__unused__)))
91{
92}], [
93    function(3);
94    return 0;
95])],
96        [AC_MSG_RESULT(yes)
97         value="__attribute__((__unused__))"],
98        [AC_MSG_RESULT(no)
99         value=""]
100    )
101    AC_SUBST([ATTRIBUTE_UNUSED], [${value}])
102])
103
104AC_DEFUN([ATF_MODULE_DEFS], [
105    ATF_ATTRIBUTE_FORMAT_PRINTF
106    ATF_ATTRIBUTE_NORETURN
107    ATF_ATTRIBUTE_UNUSED
108])
109