2009-03-17 14:20:58 -04:00
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dnl $Id$
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2009-03-15 20:08:31 -04:00
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dnl Check for sys/tree.h and if it is recent enough by looking at a certain
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dnl macro. Defines HAVE_SYS_TREE_H if all conditions are met.
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dnl Copyright (c) 2008 Moritz Grimm <mgrimm@mrsserver.net>
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dnl
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dnl Permission to use, copy, modify, and distribute this software for any
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dnl purpose with or without fee is hereby granted, provided that the above
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dnl copyright notice and this permission notice appear in all copies.
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dnl
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dnl THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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dnl WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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dnl MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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dnl ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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dnl WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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dnl ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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dnl OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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dnl AX_HEADER_TREE([REQUIRED-MACRO], [ACTION-IF-FOUND],
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dnl [ACTION-IF-NOT-FOUND])
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AC_DEFUN([AX_HEADER_TREE],
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[
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if test x"$1" = "x"; then
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_tree_macro="RB_INIT"
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else
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_tree_macro=$1
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fi
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AC_MSG_CHECKING([for ${_tree_macro} in sys/tree.h])
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AC_CACHE_VAL([local_cv_header_sys_tree_h],
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[
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AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[[
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#include <sys/tree.h>
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#if !defined(${_tree_macro})
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# error Required tree macro missing
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#endif /* !${_tree_macro} */
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]],
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[[]])],
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[local_cv_header_sys_tree_h=yes],
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[local_cv_header_sys_tree_h=no])
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])
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if test x"${local_cv_header_sys_tree_h}" = "xyes"; then
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AC_MSG_RESULT([yes])
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AC_DEFINE([HAVE_SYS_TREE_H], [1],
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[Define to 1 if you have a sufficiently recent <sys/tree.h> header.])
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:
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$2
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else
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AC_MSG_RESULT([no])
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:
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$3
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fi
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])
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