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 gl_have_func=no # yes means we've found a way to get the load average.
25 # Make sure getloadavg.c is where it belongs, at configure-time.
26 test -f "$srcdir/$1/getloadavg.c" ||
27 AC_MSG_ERROR([$srcdir/$1/getloadavg.c is missing])
31 # Check for getloadavg, but be sure not to touch the cache variable.
32 (AC_CHECK_FUNC([getloadavg], [exit 0], [exit 1])) && gl_have_func=yes
34 # On HPUX9, an unprivileged user can get load averages through this function.
35 AC_CHECK_FUNCS([pstat_getdynamic])
37 # Solaris has libkstat which does not require root.
38 AC_CHECK_LIB([kstat], [kstat_open])
39 test $ac_cv_lib_kstat_kstat_open = yes && gl_have_func=yes
41 # AIX has libperfstat which does not require root
42 AC_CHECK_LIB([perfstat], [perfstat_cpu_total])
43 test $ac_cv_lib_perfstat_perfstat_cpu_total = yes && gl_have_func=yes
45 # Some systems with -lutil have (and need) -lkvm as well, some do not.
46 # On Solaris, -lkvm requires nlist from -lelf, so check that first
47 # to get the right answer into the cache.
48 # For kstat on solaris, we need to test for libelf and libkvm to force the
49 # definition of SVR4 below.
50 if test $gl_have_func = no; then
51 AC_CHECK_LIB([elf], [elf_begin], [LIBS="-lelf $LIBS"])
52 AC_CHECK_LIB([kvm], [kvm_open], [LIBS="-lkvm $LIBS"])
53 # Check for the 4.4BSD definition of getloadavg.
54 AC_CHECK_LIB([util], [getloadavg],
55 [LIBS="-lutil $LIBS" gl_have_func=yes gl_cv_func_getloadavg_setgid=yes])
58 if test $gl_have_func = no; then
59 # There is a commonly available library for RS/6000 AIX.
60 # Since it is not a standard part of AIX, it might be installed locally.
61 gl_getloadavg_LIBS=$LIBS
62 LIBS="-L/usr/local/lib $LIBS"
63 AC_CHECK_LIB([getloadavg], [getloadavg],
64 [LIBS="-lgetloadavg $LIBS"], [LIBS=$gl_getloadavg_LIBS])
67 # Make sure it is really in the library, if we think we found it,
68 # otherwise set up the replacement function.
69 AC_CHECK_FUNCS([getloadavg], [],
70 [gl_PREREQ_GETLOADAVG])
72 # Some definitions of getloadavg require that the program be installed setgid.
73 AC_CACHE_CHECK([whether getloadavg requires setgid],
74 gl_cv_func_getloadavg_setgid,
75 [AC_EGREP_CPP([Yowza Am I SETGID yet],
76 [#define CONFIGURING_GETLOADAVG
77 #include "$srcdir/$1/getloadavg.c"
78 #ifdef LDAV_PRIVILEGED
82 gl_cv_func_getloadavg_setgid=yes,
83 gl_cv_func_getloadavg_setgid=no)])
84 if test $gl_cv_func_getloadavg_setgid = yes; then
86 AC_DEFINE([GETLOADAVG_PRIVILEGED], [1],
87 [Define to 1 if the `getloadavg' function needs to be run setuid
92 AC_SUBST([NEED_SETGID])dnl
94 if test $gl_cv_func_getloadavg_setgid = yes; then
95 AC_CACHE_CHECK([group of /dev/kmem], [gl_cv_group_kmem],
96 [ # On Solaris, /dev/kmem is a symlink. Get info on the real file.
97 ac_ls_output=`ls -lgL /dev/kmem 2>/dev/null`
98 # If we got an error (system does not support symlinks), try without -L.
99 test -z "$ac_ls_output" && ac_ls_output=`ls -lg /dev/kmem`
100 gl_cv_group_kmem=`echo $ac_ls_output \
101 | sed -ne ['s/[ ][ ]*/ /g
102 s/^.[sSrwx-]* *[0-9]* *\([^0-9]*\) *.*/\1/
105 AC_SUBST([KMEM_GROUP], [$gl_cv_group_kmem])dnl
107 if test "x$gl_save_LIBS" = x; then
108 GETLOADAVG_LIBS=$LIBS
110 GETLOADAVG_LIBS=`echo "$LIBS" | sed "s!$gl_save_LIBS!!"`
114 AC_SUBST([GETLOADAVG_LIBS])dnl
116 # Test whether the system declares getloadavg. Solaris has the function
117 # but declares it in <sys/loadavg.h>, not <stdlib.h>.
118 AC_CHECK_HEADERS([sys/loadavg.h])
119 if test $ac_cv_header_sys_loadavg_h = yes; then
124 AC_CHECK_DECL([getloadavg], [], [HAVE_DECL_GETLOADAVG=0],
125 [#if HAVE_SYS_LOADAVG_H
126 # include <sys/loadavg.h>
128 #include <stdlib.h>])
132 # gl_PREREQ_GETLOADAVG
133 # --------------------
134 # Set up the AC_LIBOBJ replacement of `getloadavg'.
135 AC_DEFUN([gl_PREREQ_GETLOADAVG],
136 [AC_LIBOBJ([getloadavg])
137 AC_DEFINE([C_GETLOADAVG], [1], [Define to 1 if using `getloadavg.c'.])
138 # Figure out what our getloadavg.c needs.
140 AC_CHECK_HEADER([sys/dg_sys_info.h],
142 AC_DEFINE([DGUX], [1], [Define to 1 for DGUX with <sys/dg_sys_info.h>.])
143 AC_CHECK_LIB([dgc], [dg_sys_info])])
145 # We cannot check for <dwarf.h>, because Solaris 2 does not use dwarf (it
146 # uses stabs), but it is still SVR4. We cannot check for <elf.h> because
147 # Irix 4.0.5F has the header but not the library.
148 if test $gl_have_func = no && test "$ac_cv_lib_elf_elf_begin" = yes \
149 && test "$ac_cv_lib_kvm_kvm_open" = yes; then
151 AC_DEFINE([SVR4], [1], [Define to 1 on System V Release 4.])
154 if test $gl_have_func = no; then
155 AC_CHECK_HEADER([inq_stats/cpustats.h],
157 AC_DEFINE([UMAX], [1], [Define to 1 for Encore UMAX.])
158 AC_DEFINE([UMAX4_3], [1],
159 [Define to 1 for Encore UMAX 4.3 that has <inq_status/cpustats.h>
160 instead of <sys/cpustats.h>.])])
163 if test $gl_have_func = no; then
164 AC_CHECK_HEADER([sys/cpustats.h],
165 [gl_have_func=yes; AC_DEFINE([UMAX])])
168 if test $gl_have_func = no; then
169 AC_CHECK_HEADERS([mach/mach.h])
172 AC_CHECK_HEADERS([nlist.h],
173 [AC_CHECK_MEMBERS([struct nlist.n_un.n_name],
174 [AC_DEFINE([NLIST_NAME_UNION], [1],
175 [Define to 1 if your `struct nlist' has an
176 `n_un' member. Obsolete, depend on
177 `HAVE_STRUCT_NLIST_N_UN_N_NAME])], [],
178 [@%:@include <nlist.h>])
179 AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <nlist.h>]],
181 #ifdef HAVE_STRUCT_NLIST_N_UN_N_NAME
186 [AC_DEFINE([N_NAME_POINTER], [1],
187 [Define to 1 if the nlist n_name member is a pointer])])
189 ])# gl_PREREQ_GETLOADAVG