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@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 49AU_ALIAS([AC_CHECK_DEFINED], [AC_CHECK_DEFINE]) 50AC_DEFUN([AC_CHECK_DEFINE],[ 51AS_VAR_PUSHDEF([ac_var],[ac_cv_defined_$1])dnl 52AC_CACHE_CHECK([for $1 defined], ac_var, 53AC_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)])) 60AS_IF([test AS_VAR_GET(ac_var) != "no"], [$2], [$3])dnl 61AS_VAR_POPDEF([ac_var])dnl 62]) 63 64AU_ALIAS([AX_CHECK_DEFINED], [AX_CHECK_DEFINE]) 65AC_DEFUN([AX_CHECK_DEFINE],[ 66AS_VAR_PUSHDEF([ac_var],[ac_cv_defined_$2_$1])dnl 67AC_CACHE_CHECK([for $2 defined in $1], ac_var, 68AC_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)])) 75AS_IF([test AS_VAR_GET(ac_var) != "no"], [$3], [$4])dnl 76AS_VAR_POPDEF([ac_var])dnl 77]) 78 79AC_DEFUN([AX_CHECK_FUNC], 80[AS_VAR_PUSHDEF([ac_var], [ac_cv_func_$2])dnl 81AC_CACHE_CHECK([for $2], ac_var, 82dnl 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)])]) 90AS_IF([test AS_VAR_GET(ac_var) = yes], [$3], [$4])dnl 91AS_VAR_POPDEF([ac_var])dnl 92])# AC_CHECK_FUNC 93