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1 | # =========================================================================== |
2 | # http://www.gnu.org/software/autoconf-archive/ax_check_define.html | |
3 | # =========================================================================== | |
4 | # | |
5 | # SYNOPSIS | |
6 | # | |
7 | # AC_CHECK_DEFINE([symbol], [ACTION-IF-FOUND], [ACTION-IF-NOT]) | |
8 | # AX_CHECK_DEFINE([includes],[symbol], [ACTION-IF-FOUND], [ACTION-IF-NOT]) | |
9 | # | |
10 | # DESCRIPTION | |
11 | # | |
12 | # Complements AC_CHECK_FUNC but it does not check for a function but for a | |
13 | # define to exist. Consider a usage like: | |
14 | # | |
15 | # AC_CHECK_DEFINE(__STRICT_ANSI__, CFLAGS="$CFLAGS -D_XOPEN_SOURCE=500") | |
16 | # | |
17 | # LICENSE | |
18 | # | |
19 | # Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de> | |
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 8 | |
48 | ||
49 | AU_ALIAS([AC_CHECK_DEFINED], [AC_CHECK_DEFINE]) | |
50 | AC_DEFUN([AC_CHECK_DEFINE],[ | |
51 | AS_VAR_PUSHDEF([ac_var],[ac_cv_defined_$1])dnl | |
52 | AC_CACHE_CHECK([for $1 defined], ac_var, | |
53 | AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[ | |
54 | #ifdef $1 | |
55 | int ok; | |
56 | #else | |
57 | choke me | |
58 | #endif | |
59 | ]])],[AS_VAR_SET(ac_var, yes)],[AS_VAR_SET(ac_var, no)])) | |
60 | AS_IF([test AS_VAR_GET(ac_var) != "no"], [$2], [$3])dnl | |
61 | AS_VAR_POPDEF([ac_var])dnl | |
62 | ]) | |
63 | ||
64 | AU_ALIAS([AX_CHECK_DEFINED], [AX_CHECK_DEFINE]) | |
65 | AC_DEFUN([AX_CHECK_DEFINE],[ | |
66 | AS_VAR_PUSHDEF([ac_var],[ac_cv_defined_$2_$1])dnl | |
67 | AC_CACHE_CHECK([for $2 defined in $1], ac_var, | |
68 | AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <$1>]], [[ | |
69 | #ifdef $2 | |
70 | int ok; | |
71 | #else | |
72 | choke me | |
73 | #endif | |
74 | ]])],[AS_VAR_SET(ac_var, yes)],[AS_VAR_SET(ac_var, no)])) | |
75 | AS_IF([test AS_VAR_GET(ac_var) != "no"], [$3], [$4])dnl | |
76 | AS_VAR_POPDEF([ac_var])dnl | |
77 | ]) | |
78 | ||
79 | AC_DEFUN([AX_CHECK_FUNC], | |
80 | [AS_VAR_PUSHDEF([ac_var], [ac_cv_func_$2])dnl | |
81 | AC_CACHE_CHECK([for $2], ac_var, | |
82 | dnl AC_LANG_FUNC_LINK_TRY | |
83 | [AC_LINK_IFELSE([AC_LANG_PROGRAM([$1 | |
84 | #undef $2 | |
85 | char $2 ();],[ | |
86 | char (*f) () = $2; | |
87 | return f != $2; ])], | |
88 | [AS_VAR_SET(ac_var, yes)], | |
89 | [AS_VAR_SET(ac_var, no)])]) | |
90 | AS_IF([test AS_VAR_GET(ac_var) = yes], [$3], [$4])dnl | |
91 | AS_VAR_POPDEF([ac_var])dnl | |
92 | ])# AC_CHECK_FUNC |