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# ===========================================================================
# https://www.gnu.org/software/autoconf-archive/ax_sysv_ipc.html
# ===========================================================================
#
# SYNOPSIS
#
# AX_SYSV_IPC
#
# DESCRIPTION
#
# This macro checks for the SysV IPC header files. It only checks that you
# can compile a program with them, not whether the system actually
# implements working SysV IPC.
#
# LICENSE
#
# Copyright (c) 2008 Warren Young <warren@etr-usa.com>
#
# 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. This file is offered as-is, without any
# warranty.
#serial 9
AU_ALIAS([ETR_SYSV_IPC], [AX_SYSV_IPC])
AC_DEFUN([AX_SYSV_IPC],
[
AC_CACHE_CHECK([for System V IPC headers], ac_cv_sysv_ipc, [
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/msg.h>
#include <sys/sem.h>
#include <sys/shm.h>
]], [])], [ac_cv_sysv_ipc=yes], [ac_cv_sysv_ipc=no])
])
if test x"$ac_cv_sysv_ipc" = "xyes"
then
AC_DEFINE(HAVE_SYSV_IPC, 1, [ Define if you have System V IPC ])
fi
]) dnl AX_SYSV_IPC
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