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#####
#
# SYNOPSIS
#
# AX_FUNC_GETCONTEXT
#
# DESCRIPTION
#
# Checks whether getcontext(3) is available.
#
# This macro uses compile-time detection and so is cross-compile
# ready.
#
# LAST MODIFICATION
#
# 2006-12-25
#
# COPYLEFT
#
# Copyright (c) 2006 YAMAMOTO Kengo <yamaken AT bp.iij4u.or.jp>
#
# Copying and distribution of this file, with or without
# modification, are permitted in any medium without royalty provided
# the copyright notice and this notice are preserved.
AC_DEFUN([AX_FUNC_GETCONTEXT], [
AC_CACHE_CHECK([for getcontext],
[ax_cv_func_getcontext],
[AC_LINK_IFELSE(
AC_LANG_PROGRAM([[@%:@include <ucontext.h>]],
[[ucontext_t ctx;
return getcontext(&ctx);]]),
[ax_cv_func_getcontext=yes],
[ax_cv_func_getcontext=no])])
if test "x$ax_cv_func_getcontext" = xyes; then
AC_DEFINE([HAVE_GETCONTEXT], [1],
[Define to 1 if you have the `getcontext' function.])
fi
])
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