1 # Check for getloadavg.
3 # Copyright (C) 1992-1996, 1999-2000, 2002-2003, 2006, 2008-2011 Free Software
6 # This file is free software; the Free Software Foundation
7 # gives unlimited permission to copy and/or distribute it,
8 # with or without modifications, as long as this notice is preserved.
12 # Autoconf defines AC_FUNC_GETLOADAVG, but that is obsolescent.
13 # New applications should use gl_GETLOADAVG instead.
15 # gl_GETLOADAVG(LIBOBJDIR)
16 # ------------------------
17 AC_DEFUN([gl_GETLOADAVG],
18 [AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
20 # Persuade glibc <stdlib.h> to declare getloadavg().
21 AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
23 # Make sure getloadavg.c is where it belongs, at configure-time.
24 test -f "$srcdir/$1/getloadavg.c" ||
25 AC_MSG_ERROR([$srcdir/$1/getloadavg.c is missing])
29 AC_CHECK_FUNC([getloadavg], [],
32 # Some systems with -lutil have (and need) -lkvm as well, some do not.
33 # On Solaris, -lkvm requires nlist from -lelf, so check that first
34 # to get the right answer into the cache.
35 # For kstat on solaris, we need to test for libelf and libkvm to force the
36 # definition of SVR4 below.
37 if test $gl_have_func = no; then
38 AC_CHECK_LIB([elf], [elf_begin], [LIBS="-lelf $LIBS"])
39 AC_CHECK_LIB([kvm], [kvm_open], [LIBS="-lkvm $LIBS"])
40 # Check for the 4.4BSD definition of getloadavg.
41 AC_CHECK_LIB([util], [getloadavg],
42 [LIBS="-lutil $LIBS" gl_have_func=yes])
45 if test $gl_have_func = no; then
46 # There is a commonly available library for RS/6000 AIX.
47 # Since it is not a standard part of AIX, it might be installed locally.
48 gl_getloadavg_LIBS=$LIBS
49 LIBS="-L/usr/local/lib $LIBS"
50 AC_CHECK_LIB([getloadavg], [getloadavg],
51 [LIBS="-lgetloadavg $LIBS" gl_have_func=yes],
52 [LIBS=$gl_getloadavg_LIBS])
55 # Set up the replacement function if necessary.
56 if test $gl_have_func = no; then
57 AC_LIBOBJ([getloadavg])
61 if test "x$gl_save_LIBS" = x; then
64 GETLOADAVG_LIBS=`echo "$LIBS" | sed "s!$gl_save_LIBS!!"`
68 AC_SUBST([GETLOADAVG_LIBS])dnl
70 # Test whether the system declares getloadavg. Solaris has the function
71 # but declares it in <sys/loadavg.h>, not <stdlib.h>.
72 AC_CHECK_HEADERS([sys/loadavg.h])
73 if test $ac_cv_header_sys_loadavg_h = yes; then
78 AC_CHECK_DECL([getloadavg], [], [HAVE_DECL_GETLOADAVG=0],
79 [#if HAVE_SYS_LOADAVG_H
80 # include <sys/loadavg.h>
86 # gl_PREREQ_GETLOADAVG
87 # --------------------
88 # Set up the AC_LIBOBJ replacement of `getloadavg'.
89 AC_DEFUN([gl_PREREQ_GETLOADAVG],
91 # Figure out what our getloadavg.c needs.
93 # Solaris has libkstat which does not require root.
94 AC_CHECK_LIB([kstat], [kstat_open])
95 test $ac_cv_lib_kstat_kstat_open = yes && gl_have_func=yes
97 # On HPUX9, an unprivileged user can get load averages this way.
98 if test $gl_have_func = no; then
99 AC_CHECK_FUNCS([pstat_getdynamic], [gl_have_func=yes])
102 # AIX has libperfstat which does not require root
103 if test $gl_have_func = no; then
104 AC_CHECK_LIB([perfstat], [perfstat_cpu_total])
105 test $ac_cv_lib_perfstat_perfstat_cpu_total = yes && gl_have_func=yes
108 if test $gl_have_func = no; then
109 AC_CHECK_HEADER([sys/dg_sys_info.h],
111 AC_DEFINE([DGUX], [1], [Define to 1 for DGUX with <sys/dg_sys_info.h>.])
112 AC_CHECK_LIB([dgc], [dg_sys_info])])
115 # We cannot check for <dwarf.h>, because Solaris 2 does not use dwarf (it
116 # uses stabs), but it is still SVR4. We cannot check for <elf.h> because
117 # Irix 4.0.5F has the header but not the library.
118 if test $gl_have_func = no && test "$ac_cv_lib_elf_elf_begin" = yes \
119 && test "$ac_cv_lib_kvm_kvm_open" = yes; then
121 AC_DEFINE([SVR4], [1], [Define to 1 on System V Release 4.])
124 if test $gl_have_func = no; then
125 AC_CHECK_HEADER([inq_stats/cpustats.h],
127 AC_DEFINE([UMAX], [1], [Define to 1 for Encore UMAX.])
128 AC_DEFINE([UMAX4_3], [1],
129 [Define to 1 for Encore UMAX 4.3 that has <inq_status/cpustats.h>
130 instead of <sys/cpustats.h>.])])
133 if test $gl_have_func = no; then
134 AC_CHECK_HEADER([sys/cpustats.h],
135 [gl_have_func=yes; AC_DEFINE([UMAX])])
138 if test $gl_have_func = no; then
139 AC_CHECK_HEADERS([mach/mach.h])
142 AC_CHECK_HEADERS([nlist.h],
143 [AC_CHECK_MEMBERS([struct nlist.n_un.n_name],
145 [@%:@include <nlist.h>])
146 AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <nlist.h>]],
148 #ifdef HAVE_STRUCT_NLIST_N_UN_N_NAME
153 [AC_DEFINE([N_NAME_POINTER], [1],
154 [Define to 1 if the nlist n_name member is a pointer])])
156 ])# gl_PREREQ_GETLOADAVG