1 # ===========================================================================
2 # http://www.gnu.org/software/autoconf-archive/ax_check_define.html
3 # ===========================================================================
7 # AC_CHECK_DEFINE([symbol], [ACTION-IF-FOUND], [ACTION-IF-NOT])
8 # AX_CHECK_DEFINE([includes],[symbol], [ACTION-IF-FOUND], [ACTION-IF-NOT])
12 # Complements AC_CHECK_FUNC but it does not check for a function but for a
13 # define to exist. Consider a usage like:
15 # AC_CHECK_DEFINE(__STRICT_ANSI__, CFLAGS="$CFLAGS -D_XOPEN_SOURCE=500")
19 # Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
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.
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.
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/>.
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.
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.
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([[]], [[
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
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>]], [[
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
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
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