-# physmem.m4 serial 9
+# physmem.m4 serial 10
dnl Copyright (C) 2002-2003, 2005-2006, 2008-2009 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
# Prerequisites of lib/physmem.c.
AC_CHECK_HEADERS([sys/pstat.h sys/sysmp.h sys/sysinfo.h \
- machine/hal_sysinfo.h sys/table.h sys/param.h sys/sysctl.h \
- sys/systemcfg.h],,, [AC_INCLUDES_DEFAULT])
+ machine/hal_sysinfo.h sys/table.h sys/param.h sys/systemcfg.h],,,
+ [AC_INCLUDES_DEFAULT])
+ dnl <sys/sysctl.h> requires <sys/param.h> on OpenBSD 4.0.
+ AC_CHECK_HEADERS([sys/sysctl.h],,,
+ [AC_INCLUDES_DEFAULT
+ #if HAVE_SYS_PARAM_H
+ # include <sys/param.h>
+ #endif
+ ])
AC_CHECK_FUNCS([pstat_getstatic pstat_getdynamic sysmp getsysinfo sysctl table])
AC_REQUIRE([gl_SYS__SYSTEM_CONFIGURATION])