1 # =========================================================================== 2 # https://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 (a] 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 <https://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 9 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 93
Indexes created Sat Sep 27 22:09:54 GMT 2025