| 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 |