2015-08-01 21:36:52 -04:00
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# ===========================================================================
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2017-03-22 09:21:07 -04:00
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# https://www.gnu.org/software/autoconf-archive/ax_check_define.html
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2015-08-01 21:36:52 -04:00
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# ===========================================================================
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#
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# SYNOPSIS
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#
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# AC_CHECK_DEFINE([symbol], [ACTION-IF-FOUND], [ACTION-IF-NOT])
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# AX_CHECK_DEFINE([includes],[symbol], [ACTION-IF-FOUND], [ACTION-IF-NOT])
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#
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# DESCRIPTION
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#
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# Complements AC_CHECK_FUNC but it does not check for a function but for a
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# define to exist. Consider a usage like:
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#
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# AC_CHECK_DEFINE(__STRICT_ANSI__, CFLAGS="$CFLAGS -D_XOPEN_SOURCE=500")
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#
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# LICENSE
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#
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# Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
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#
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2023-09-08 15:57:51 -04:00
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# Copying and distribution of this file, with or without modification, are
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# permitted in any medium without royalty provided the copyright notice
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# and this notice are preserved. This file is offered as-is, without any
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# warranty.
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2015-08-01 21:36:52 -04:00
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2023-09-08 15:57:51 -04:00
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#serial 11
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2015-08-01 21:36:52 -04:00
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AU_ALIAS([AC_CHECK_DEFINED], [AC_CHECK_DEFINE])
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AC_DEFUN([AC_CHECK_DEFINE],[
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AS_VAR_PUSHDEF([ac_var],[ac_cv_defined_$1])dnl
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AC_CACHE_CHECK([for $1 defined], ac_var,
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[
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#ifdef $1
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int ok;
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(void)ok;
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#else
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choke me
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#endif
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]])],[AS_VAR_SET(ac_var, yes)],[AS_VAR_SET(ac_var, no)]))
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AS_IF([test AS_VAR_GET(ac_var) != "no"], [$2], [$3])dnl
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AS_VAR_POPDEF([ac_var])dnl
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])
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AU_ALIAS([AX_CHECK_DEFINED], [AX_CHECK_DEFINE])
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AC_DEFUN([AX_CHECK_DEFINE],[
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AS_VAR_PUSHDEF([ac_var],[ac_cv_defined_$2_$1])dnl
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AC_CACHE_CHECK([for $2 defined in $1], ac_var,
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <$1>]], [[
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#ifdef $2
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int ok;
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(void)ok;
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2015-08-01 21:36:52 -04:00
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#else
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choke me
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#endif
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]])],[AS_VAR_SET(ac_var, yes)],[AS_VAR_SET(ac_var, no)]))
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AS_IF([test AS_VAR_GET(ac_var) != "no"], [$3], [$4])dnl
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AS_VAR_POPDEF([ac_var])dnl
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])
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AC_DEFUN([AX_CHECK_FUNC],
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[AS_VAR_PUSHDEF([ac_var], [ac_cv_func_$2])dnl
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AC_CACHE_CHECK([for $2], ac_var,
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dnl AC_LANG_FUNC_LINK_TRY
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[AC_LINK_IFELSE([AC_LANG_PROGRAM([$1
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#undef $2
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char $2 ();],[
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char (*f) () = $2;
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return f != $2; ])],
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[AS_VAR_SET(ac_var, yes)],
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[AS_VAR_SET(ac_var, no)])])
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AS_IF([test AS_VAR_GET(ac_var) = yes], [$3], [$4])dnl
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AS_VAR_POPDEF([ac_var])dnl
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])# AC_CHECK_FUNC
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