3 dnl Copyright (C) 2002-2003, 2005-2006, 2008-2024 Free Software Foundation,
5 dnl This file is free software; the Free Software Foundation
6 dnl gives unlimited permission to copy and/or distribute it,
7 dnl with or without modifications, as long as this notice is preserved.
9 # Check for the external symbol, _system_configuration,
10 # a struct with member 'physmem'.
11 AC_DEFUN([gl_SYS__SYSTEM_CONFIGURATION],
12 [AC_CACHE_CHECK([for external symbol _system_configuration],
13 [gl_cv_var__system_configuration],
14 [AC_LINK_IFELSE([AC_LANG_PROGRAM(
15 [[#include <sys/systemcfg.h>
17 [[double x = _system_configuration.physmem;
18 if (x > 0.0) return 0;]])],
19 [gl_cv_var__system_configuration=yes],
20 [gl_cv_var__system_configuration=no])])
22 if test $gl_cv_var__system_configuration = yes; then
23 AC_DEFINE([HAVE__SYSTEM_CONFIGURATION], [1],
24 [Define to 1 if you have the external variable,
25 _system_configuration with a member named physmem.])
30 AC_DEFUN([gl_PHYSMEM],
32 # Prerequisites of lib/physmem.c.
33 AC_CHECK_HEADERS([sys/pstat.h sys/sysmp.h sys/sysinfo.h \
34 machine/hal_sysinfo.h sys/table.h sys/param.h sys/systemcfg.h],,,
35 [AC_INCLUDES_DEFAULT])
36 dnl <sys/sysctl.h> requires <sys/param.h> on OpenBSD 4.0.
37 AC_CHECK_HEADERS([sys/sysctl.h],,,
40 # include <sys/param.h>
44 AC_CHECK_FUNCS([pstat_getstatic pstat_getdynamic sysmp getsysinfo sysctl table sysinfo])
45 AC_CHECK_MEMBERS([struct sysinfo.mem_unit],,, [[#include <sys/sysinfo.h>]])
46 AC_REQUIRE([gl_SYS__SYSTEM_CONFIGURATION])