ax_check_define.m4 (2267B)
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 # Copying and distribution of this file, with or without modification, are 22 # permitted in any medium without royalty provided the copyright notice 23 # and this notice are preserved. This file is offered as-is, without any 24 # warranty. 25 26 #serial 11 27 28 AU_ALIAS([AC_CHECK_DEFINED], [AC_CHECK_DEFINE]) 29 AC_DEFUN([AC_CHECK_DEFINE],[ 30 AS_VAR_PUSHDEF([ac_var],[ac_cv_defined_$1])dnl 31 AC_CACHE_CHECK([for $1 defined], ac_var, 32 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[ 33 #ifdef $1 34 int ok; 35 (void)ok; 36 #else 37 choke me 38 #endif 39 ]])],[AS_VAR_SET(ac_var, yes)],[AS_VAR_SET(ac_var, no)])) 40 AS_IF([test AS_VAR_GET(ac_var) != "no"], [$2], [$3])dnl 41 AS_VAR_POPDEF([ac_var])dnl 42 ]) 43 44 AU_ALIAS([AX_CHECK_DEFINED], [AX_CHECK_DEFINE]) 45 AC_DEFUN([AX_CHECK_DEFINE],[ 46 AS_VAR_PUSHDEF([ac_var],[ac_cv_defined_$2_$1])dnl 47 AC_CACHE_CHECK([for $2 defined in $1], ac_var, 48 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <$1>]], [[ 49 #ifdef $2 50 int ok; 51 (void)ok; 52 #else 53 choke me 54 #endif 55 ]])],[AS_VAR_SET(ac_var, yes)],[AS_VAR_SET(ac_var, no)])) 56 AS_IF([test AS_VAR_GET(ac_var) != "no"], [$3], [$4])dnl 57 AS_VAR_POPDEF([ac_var])dnl 58 ]) 59 60 AC_DEFUN([AX_CHECK_FUNC], 61 [AS_VAR_PUSHDEF([ac_var], [ac_cv_func_$2])dnl 62 AC_CACHE_CHECK([for $2], ac_var, 63 dnl AC_LANG_FUNC_LINK_TRY 64 [AC_LINK_IFELSE([AC_LANG_PROGRAM([$1 65 #undef $2 66 char $2 ();],[ 67 char (*f) () = $2; 68 return f != $2; ])], 69 [AS_VAR_SET(ac_var, yes)], 70 [AS_VAR_SET(ac_var, no)])]) 71 AS_IF([test AS_VAR_GET(ac_var) = yes], [$3], [$4])dnl 72 AS_VAR_POPDEF([ac_var])dnl 73 ])# AC_CHECK_FUNC