-# physmem.m4 serial 1
-dnl Copyright (C) 2002 Free Software Foundation, Inc.
-dnl This file is free software, distributed under the terms of the GNU
-dnl General Public License. As a special exception to the GNU General
-dnl Public License, this file may be distributed as part of a program
-dnl that contains a configuration script generated by Autoconf, under
-dnl the same distribution terms as the rest of that program.
+# physmem.m4 serial 5
+dnl Copyright (C) 2002, 2003, 2005 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+# Check for the external symbol, _system_configuration,
+# a struct with member `physmem'.
+AC_DEFUN([gl_SYS__SYSTEM_CONFIGURATION],
+ [AC_CACHE_CHECK(for external symbol _system_configuration,
+ gl_cv_var__system_configuration,
+ [AC_LINK_IFELSE([AC_LANG_PROGRAM(
+ [[#include <sys/systemcfg.h>
+ ]],
+ [double x = _system_configuration.physmem;])],
+ [gl_cv_var__system_configuration=yes],
+ [gl_cv_var__system_configuration=no])])
+
+ if test $gl_cv_var__system_configuration = yes; then
+ AC_DEFINE(HAVE__SYSTEM_CONFIGURATION, 1,
+ [Define to 1 if you have the external variable,
+ _system_configuration with a member named physmem.])
+ fi
+ ]
+)