3 dnl Copyright (C) 1992-1996, 1999-2000, 2002-2003, 2006, 2008-2024 Free Software
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 getloadavg.
11 # Autoconf defines AC_FUNC_GETLOADAVG, but that is obsolescent.
12 # New applications should use gl_GETLOADAVG instead.
16 AC_DEFUN([gl_GETLOADAVG],
17 [AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
19 # Persuade glibc <stdlib.h> to declare getloadavg().
20 AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
24 # getloadavg is present in libc on glibc >= 2.2, Mac OS X, FreeBSD >= 2.0,
25 # NetBSD >= 0.9, OpenBSD >= 2.0, Solaris >= 7.
27 gl_CHECK_FUNCS_ANDROID([getloadavg], [[#include <stdlib.h>]])
28 if test $ac_cv_func_getloadavg != yes; then
29 case "$gl_cv_onwards_func_getloadavg" in
30 future*) REPLACE_GETLOADAVG=1 ;;
33 gl_func_getloadavg_done=no
35 # Some systems with -lutil have (and need) -lkvm as well, some do not.
36 # On Solaris, -lkvm requires nlist from -lelf, so check that first
37 # to get the right answer into the cache.
38 # For kstat on solaris, we need to test for libelf and libkvm to force the
39 # definition of SVR4 below.
40 if test $gl_func_getloadavg_done = no; then
41 AC_CHECK_LIB([elf], [elf_begin], [LIBS="-lelf $LIBS"])
42 AC_CHECK_LIB([kvm], [kvm_open], [LIBS="-lkvm $LIBS"])
43 # Check for the 4.4BSD definition of getloadavg.
44 AC_CHECK_LIB([util], [getloadavg],
45 [LIBS="-lutil $LIBS" gl_func_getloadavg_done=yes])
48 if test $gl_func_getloadavg_done = no; then
49 # There is a commonly available library for RS/6000 AIX.
50 # Since it is not a standard part of AIX, it might be installed locally.
51 gl_getloadavg_LIBS=$LIBS
52 if test $cross_compiling != yes; then
53 LIBS="-L/usr/local/lib $LIBS"
55 AC_CHECK_LIB([getloadavg], [getloadavg],
56 [LIBS="-lgetloadavg $LIBS" gl_func_getloadavg_done=yes],
57 [LIBS=$gl_getloadavg_LIBS])
60 # Set up the replacement function if necessary.
61 if test $gl_func_getloadavg_done = no; then
64 # Solaris has libkstat which does not require root.
65 AC_CHECK_LIB([kstat], [kstat_open])
66 test $ac_cv_lib_kstat_kstat_open = yes && gl_func_getloadavg_done=yes
68 # AIX has libperfstat which does not require root
69 if test $gl_func_getloadavg_done = no; then
70 AC_CHECK_LIB([perfstat], [perfstat_cpu_total])
71 test $ac_cv_lib_perfstat_perfstat_cpu_total = yes && gl_func_getloadavg_done=yes
74 if test $gl_func_getloadavg_done = no; then
75 AC_CHECK_HEADER([sys/dg_sys_info.h],
76 [gl_func_getloadavg_done=yes
77 AC_DEFINE([DGUX], [1], [Define to 1 for DGUX with <sys/dg_sys_info.h>.])
78 AC_CHECK_LIB([dgc], [dg_sys_info])])
83 if test "x$gl_saved_LIBS" = x; then
86 GETLOADAVG_LIBS=`echo "$LIBS" | sed "s!$gl_saved_LIBS!!"`
90 AC_SUBST([GETLOADAVG_LIBS])dnl
92 # Test whether the system declares getloadavg. Solaris has the function
93 # but declares it in <sys/loadavg.h>, not <stdlib.h>.
94 AC_CHECK_HEADERS([sys/loadavg.h])
95 if test $ac_cv_header_sys_loadavg_h = yes; then
100 AC_CHECK_DECL([getloadavg], [], [HAVE_DECL_GETLOADAVG=0],
101 [[#if HAVE_SYS_LOADAVG_H
102 /* OpenIndiana has a bug: <sys/time.h> must be included before
104 # include <sys/time.h>
105 # include <sys/loadavg.h>
107 #include <stdlib.h>]])
111 # gl_PREREQ_GETLOADAVG
112 # --------------------
113 # Set up the AC_LIBOBJ replacement of 'getloadavg'.
114 AC_DEFUN([gl_PREREQ_GETLOADAVG],
116 # Figure out what our getloadavg.c needs.
118 AC_CHECK_HEADERS_ONCE([sys/param.h unistd.h])
120 # On HPUX9, an unprivileged user can get load averages this way.
121 if test $gl_func_getloadavg_done = no; then
122 AC_CHECK_FUNCS([pstat_getdynamic], [gl_func_getloadavg_done=yes])
125 # We cannot check for <dwarf.h>, because Solaris 2 does not use dwarf (it
126 # uses stabs), but it is still SVR4. We cannot check for <elf.h> because
127 # Irix 4.0.5F has the header but not the library.
128 if test $gl_func_getloadavg_done = no && test "$ac_cv_lib_elf_elf_begin" = yes \
129 && test "$ac_cv_lib_kvm_kvm_open" = yes; then
130 gl_func_getloadavg_done=yes
131 AC_DEFINE([SVR4], [1], [Define to 1 on System V Release 4.])
134 if test $gl_func_getloadavg_done = no; then
135 AC_CHECK_HEADER([inq_stats/cpustats.h],
136 [gl_func_getloadavg_done=yes
137 AC_DEFINE([UMAX], [1], [Define to 1 for Encore UMAX.])
138 AC_DEFINE([UMAX4_3], [1],
139 [Define to 1 for Encore UMAX 4.3 that has <inq_status/cpustats.h>
140 instead of <sys/cpustats.h>.])])
143 if test $gl_func_getloadavg_done = no; then
144 AC_CHECK_HEADER([sys/cpustats.h],
145 [gl_func_getloadavg_done=yes; AC_DEFINE([UMAX])])
148 if test $gl_func_getloadavg_done = no; then
149 AC_CHECK_HEADERS([mach/mach.h])
152 AC_CHECK_HEADERS([nlist.h],
153 [AC_CHECK_MEMBERS([struct nlist.n_un.n_name],
155 [#include <nlist.h>])
156 AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <nlist.h>]],
158 #ifdef HAVE_STRUCT_NLIST_N_UN_N_NAME
163 [AC_DEFINE([N_NAME_POINTER], [1],
164 [Define to 1 if the nlist n_name member is a pointer])])
166 ])# gl_PREREQ_GETLOADAVG