1 # Check for getloadavg.
3 # Copyright (C) 1992, 1993, 1994, 1995, 1996, 1999, 2000, 2002, 2003,
4 # 2006 Free Software Foundation, Inc.
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.
10 # Autoconf defines AC_FUNC_GETLOADAVG, but that is obsolescent.
11 # New applications should use gl_GETLOADAVG instead.
13 # gl_PREREQ_GETLOADAVG
14 # --------------------
15 # Set up the AC_LIBOBJ replacement of `getloadavg'.
16 m4_define([gl_PREREQ_GETLOADAVG],
17 [AC_LIBOBJ(getloadavg)
18 AC_DEFINE(C_GETLOADAVG, 1, [Define to 1 if using `getloadavg.c'.])
19 # Figure out what our getloadavg.c needs.
21 AC_CHECK_HEADER(sys/dg_sys_info.h,
23 AC_DEFINE(DGUX, 1, [Define to 1 for DGUX with <sys/dg_sys_info.h>.])
24 AC_CHECK_LIB(dgc, dg_sys_info)])
26 # We cannot check for <dwarf.h>, because Solaris 2 does not use dwarf (it
27 # uses stabs), but it is still SVR4. We cannot check for <elf.h> because
28 # Irix 4.0.5F has the header but not the library.
29 if test $gl_have_func = no && test "$ac_cv_lib_elf_elf_begin" = yes; then
31 AC_DEFINE(SVR4, 1, [Define to 1 on System V Release 4.])
34 if test $gl_have_func = no; then
35 AC_CHECK_HEADER(inq_stats/cpustats.h,
37 AC_DEFINE(UMAX, 1, [Define to 1 for Encore UMAX.])
39 [Define to 1 for Encore UMAX 4.3 that has <inq_status/cpustats.h>
40 instead of <sys/cpustats.h>.])])
43 if test $gl_have_func = no; then
44 AC_CHECK_HEADER(sys/cpustats.h,
45 [gl_have_func=yes; AC_DEFINE(UMAX)])
48 if test $gl_have_func = no; then
49 AC_CHECK_HEADERS(mach/mach.h)
52 AC_CHECK_HEADERS(nlist.h,
53 [AC_CHECK_MEMBERS([struct nlist.n_un.n_name],
54 [AC_DEFINE(NLIST_NAME_UNION, 1,
55 [Define to 1 if your `struct nlist' has an
56 `n_un' member. Obsolete, depend on
57 `HAVE_STRUCT_NLIST_N_UN_N_NAME])], [],
58 [@%:@include <nlist.h>])
60 ])# gl_PREREQ_GETLOADAVG
65 AN_FUNCTION([getloadavg], [gl_GETLOADAVG])
66 AC_DEFUN([gl_GETLOADAVG],
67 [gl_have_func=no # yes means we've found a way to get the load average.
69 # Make sure getloadavg.c is where it belongs, at configure-time.
70 test -f "$srcdir/$ac_config_libobj_dir/getloadavg.c" ||
71 AC_MSG_ERROR([$srcdir/$ac_config_libobj_dir/getloadavg.c is missing])
75 # Check for getloadavg, but be sure not to touch the cache variable.
76 (AC_CHECK_FUNC(getloadavg, exit 0, exit 1)) && gl_have_func=yes
78 # On HPUX9, an unprivileged user can get load averages through this function.
79 AC_CHECK_FUNCS(pstat_getdynamic)
81 # Solaris has libkstat which does not require root.
82 AC_CHECK_LIB(kstat, kstat_open)
83 test $ac_cv_lib_kstat_kstat_open = yes && gl_have_func=yes
85 # Some systems with -lutil have (and need) -lkvm as well, some do not.
86 # On Solaris, -lkvm requires nlist from -lelf, so check that first
87 # to get the right answer into the cache.
88 # For kstat on solaris, we need libelf to force the definition of SVR4 below.
89 if test $gl_have_func = no; then
90 AC_CHECK_LIB(elf, elf_begin, LIBS="-lelf $LIBS")
92 if test $gl_have_func = no; then
93 AC_CHECK_LIB(kvm, kvm_open, LIBS="-lkvm $LIBS")
94 # Check for the 4.4BSD definition of getloadavg.
95 AC_CHECK_LIB(util, getloadavg,
96 [LIBS="-lutil $LIBS" gl_have_func=yes gl_cv_func_getloadavg_setgid=yes])
99 if test $gl_have_func = no; then
100 # There is a commonly available library for RS/6000 AIX.
101 # Since it is not a standard part of AIX, it might be installed locally.
102 gl_getloadavg_LIBS=$LIBS
103 LIBS="-L/usr/local/lib $LIBS"
104 AC_CHECK_LIB(getloadavg, getloadavg,
105 [LIBS="-lgetloadavg $LIBS"], [LIBS=$gl_getloadavg_LIBS])
108 # Make sure it is really in the library, if we think we found it,
109 # otherwise set up the replacement function.
110 AC_CHECK_FUNCS(getloadavg, [],
111 [gl_PREREQ_GETLOADAVG])
113 # Some definitions of getloadavg require that the program be installed setgid.
114 AC_CACHE_CHECK(whether getloadavg requires setgid,
115 gl_cv_func_getloadavg_setgid,
116 [AC_EGREP_CPP([Yowza Am I SETGID yet],
117 [#define gl_GETLOADAVG
118 #include "$srcdir/$ac_config_libobj_dir/getloadavg.c"
119 #ifdef LDAV_PRIVILEGED
120 Yowza Am I SETGID yet
123 gl_cv_func_getloadavg_setgid=yes,
124 gl_cv_func_getloadavg_setgid=no)])
125 if test $gl_cv_func_getloadavg_setgid = yes; then
127 AC_DEFINE(GETLOADAVG_PRIVILEGED, 1,
128 [Define to 1 if the `getloadavg' function needs to be run setuid
133 AC_SUBST(NEED_SETGID)dnl
135 if test $gl_cv_func_getloadavg_setgid = yes; then
136 AC_CACHE_CHECK(group of /dev/kmem, gl_cv_group_kmem,
137 [ # On Solaris, /dev/kmem is a symlink. Get info on the real file.
138 ac_ls_output=`ls -lgL /dev/kmem 2>/dev/null`
139 # If we got an error (system does not support symlinks), try without -L.
140 test -z "$ac_ls_output" && ac_ls_output=`ls -lg /dev/kmem`
141 gl_cv_group_kmem=`echo $ac_ls_output \
142 | sed -ne ['s/[ ][ ]*/ /g;
143 s/^.[sSrwx-]* *[0-9]* *\([^0-9]*\) *.*/\1/;
146 AC_SUBST(KMEM_GROUP, $gl_cv_group_kmem)dnl
148 if test "x$gl_save_LIBS" = x; then
149 GETLOADAVG_LIBS=$LIBS
151 GETLOADAVG_LIBS=`echo "$LIBS" | sed "s!$gl_save_LIBS!!"`
155 AC_SUBST(GETLOADAVG_LIBS)dnl