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_GETLOADAVG(LIBOBJDIR)
14 # ------------------------
15 AC_DEFUN([gl_GETLOADAVG],
16 [gl_have_func=no # yes means we've found a way to get the load average.
18 # Make sure getloadavg.c is where it belongs, at configure-time.
19 test -f "$srcdir/$1/getloadavg.c" ||
20 AC_MSG_ERROR([$srcdir/$1/getloadavg.c is missing])
24 # Check for getloadavg, but be sure not to touch the cache variable.
25 (AC_CHECK_FUNC(getloadavg, exit 0, exit 1)) && gl_have_func=yes
27 # On HPUX9, an unprivileged user can get load averages through this function.
28 AC_CHECK_FUNCS(pstat_getdynamic)
30 # Solaris has libkstat which does not require root.
31 AC_CHECK_LIB(kstat, kstat_open)
32 test $ac_cv_lib_kstat_kstat_open = yes && gl_have_func=yes
34 # Some systems with -lutil have (and need) -lkvm as well, some do not.
35 # On Solaris, -lkvm requires nlist from -lelf, so check that first
36 # to get the right answer into the cache.
37 # For kstat on solaris, we need libelf to force the definition of SVR4 below.
38 if test $gl_have_func = no; then
39 AC_CHECK_LIB(elf, elf_begin, LIBS="-lelf $LIBS")
41 if test $gl_have_func = no; then
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_have_func=yes gl_cv_func_getloadavg_setgid=yes])
48 if test $gl_have_func = no; then
49 # There is a commonly available library for RS/6000 AIX.
50 # Since it is not a standard part of AIX, it might be installed locally.
51 gl_getloadavg_LIBS=$LIBS
52 LIBS="-L/usr/local/lib $LIBS"
53 AC_CHECK_LIB(getloadavg, getloadavg,
54 [LIBS="-lgetloadavg $LIBS"], [LIBS=$gl_getloadavg_LIBS])
57 # Make sure it is really in the library, if we think we found it,
58 # otherwise set up the replacement function.
59 AC_CHECK_FUNCS(getloadavg, [],
60 [gl_PREREQ_GETLOADAVG])
62 # Some definitions of getloadavg require that the program be installed setgid.
63 AC_CACHE_CHECK(whether getloadavg requires setgid,
64 gl_cv_func_getloadavg_setgid,
65 [AC_EGREP_CPP([Yowza Am I SETGID yet],
66 [#define CONFIGURING_GETLOADAVG
67 #include "$srcdir/$1/getloadavg.c"
68 #ifdef LDAV_PRIVILEGED
72 gl_cv_func_getloadavg_setgid=yes,
73 gl_cv_func_getloadavg_setgid=no)])
74 if test $gl_cv_func_getloadavg_setgid = yes; then
76 AC_DEFINE(GETLOADAVG_PRIVILEGED, 1,
77 [Define to 1 if the `getloadavg' function needs to be run setuid
82 AC_SUBST(NEED_SETGID)dnl
84 if test $gl_cv_func_getloadavg_setgid = yes; then
85 AC_CACHE_CHECK(group of /dev/kmem, gl_cv_group_kmem,
86 [ # On Solaris, /dev/kmem is a symlink. Get info on the real file.
87 ac_ls_output=`ls -lgL /dev/kmem 2>/dev/null`
88 # If we got an error (system does not support symlinks), try without -L.
89 test -z "$ac_ls_output" && ac_ls_output=`ls -lg /dev/kmem`
90 gl_cv_group_kmem=`echo $ac_ls_output \
91 | sed -ne ['s/[ ][ ]*/ /g
92 s/^.[sSrwx-]* *[0-9]* *\([^0-9]*\) *.*/\1/
95 AC_SUBST(KMEM_GROUP, $gl_cv_group_kmem)dnl
97 if test "x$gl_save_LIBS" = x; then
100 GETLOADAVG_LIBS=`echo "$LIBS" | sed "s!$gl_save_LIBS!!"`
104 AC_SUBST(GETLOADAVG_LIBS)dnl
108 # gl_PREREQ_GETLOADAVG
109 # --------------------
110 # Set up the AC_LIBOBJ replacement of `getloadavg'.
111 AC_DEFUN([gl_PREREQ_GETLOADAVG],
112 [AC_LIBOBJ(getloadavg)
113 AC_DEFINE(C_GETLOADAVG, 1, [Define to 1 if using `getloadavg.c'.])
114 # Figure out what our getloadavg.c needs.
116 AC_CHECK_HEADER(sys/dg_sys_info.h,
118 AC_DEFINE(DGUX, 1, [Define to 1 for DGUX with <sys/dg_sys_info.h>.])
119 AC_CHECK_LIB(dgc, dg_sys_info)])
121 # We cannot check for <dwarf.h>, because Solaris 2 does not use dwarf (it
122 # uses stabs), but it is still SVR4. We cannot check for <elf.h> because
123 # Irix 4.0.5F has the header but not the library.
124 if test $gl_have_func = no && test "$ac_cv_lib_elf_elf_begin" = yes; then
126 AC_DEFINE(SVR4, 1, [Define to 1 on System V Release 4.])
129 if test $gl_have_func = no; then
130 AC_CHECK_HEADER(inq_stats/cpustats.h,
132 AC_DEFINE(UMAX, 1, [Define to 1 for Encore UMAX.])
133 AC_DEFINE(UMAX4_3, 1,
134 [Define to 1 for Encore UMAX 4.3 that has <inq_status/cpustats.h>
135 instead of <sys/cpustats.h>.])])
138 if test $gl_have_func = no; then
139 AC_CHECK_HEADER(sys/cpustats.h,
140 [gl_have_func=yes; AC_DEFINE(UMAX)])
143 if test $gl_have_func = no; then
144 AC_CHECK_HEADERS(mach/mach.h)
147 AC_CHECK_HEADERS(nlist.h,
148 [AC_CHECK_MEMBERS([struct nlist.n_un.n_name],
149 [AC_DEFINE(NLIST_NAME_UNION, 1,
150 [Define to 1 if your `struct nlist' has an
151 `n_un' member. Obsolete, depend on
152 `HAVE_STRUCT_NLIST_N_UN_N_NAME])], [],
153 [@%:@include <nlist.h>])
155 ])# gl_PREREQ_GETLOADAVG