3 # A replacement for autoconf's macro by the same name. This version
4 # accepts an optional argument specifying the name of the $srcdir-relative
5 # directory in which the file getloadavg.c may be found. It is unusual
6 # (but justified, imho) that this file is required at ./configure time.
8 undefine([AC_FUNC_GETLOADAVG])
12 AC_DEFUN([AC_FUNC_GETLOADAVG],
13 [ac_have_func=no # yes means we've found a way to get the load average.
15 # By default, expect to find getloadavg.c in $srcdir/.
16 ac_lib_dir_getloadavg=$srcdir
17 # But if there's an argument, DIR, expect to find getloadavg.c in $srcdir/DIR.
18 m4_ifval([$1], [ac_lib_dir_getloadavg=$srcdir/$1])
19 # Make sure getloadavg.c is where it belongs, at ./configure-time.
20 test -f $ac_lib_dir_getloadavg/getloadavg.c \
21 || AC_MSG_ERROR([getloadavg.c is not in $ac_lib_dir_getloadavg])
22 # FIXME: Add an autoconf-time test, too?
26 # Check for getloadavg, but be sure not to touch the cache variable.
27 (AC_CHECK_FUNC(getloadavg, exit 0, exit 1)) && ac_have_func=yes
29 # On HPUX9, an unprivileged user can get load averages through this function.
30 AC_CHECK_FUNCS(pstat_getdynamic)
32 # Solaris has libkstat which does not require root.
33 AC_CHECK_LIB(kstat, kstat_open)
34 test $ac_cv_lib_kstat_kstat_open = yes && ac_have_func=yes
36 # Some systems with -lutil have (and need) -lkvm as well, some do not.
37 # On Solaris, -lkvm requires nlist from -lelf, so check that first
38 # to get the right answer into the cache.
39 # For kstat on solaris, we need libelf to force the definition of SVR4 below.
40 if test $ac_have_func = no; then
41 AC_CHECK_LIB(elf, elf_begin, LIBS="-lelf $LIBS")
43 if test $ac_have_func = no; then
44 AC_CHECK_LIB(kvm, kvm_open, LIBS="-lkvm $LIBS")
45 # Check for the 4.4BSD definition of getloadavg.
46 AC_CHECK_LIB(util, getloadavg,
47 [LIBS="-lutil $LIBS" ac_have_func=yes ac_cv_func_getloadavg_setgid=yes])
50 if test $ac_have_func = no; then
51 # There is a commonly available library for RS/6000 AIX.
52 # Since it is not a standard part of AIX, it might be installed locally.
53 ac_getloadavg_LIBS=$LIBS
54 LIBS="-L/usr/local/lib $LIBS"
55 AC_CHECK_LIB(getloadavg, getloadavg,
56 [LIBS="-lgetloadavg $LIBS"], [LIBS=$ac_getloadavg_LIBS])
59 # Make sure it is really in the library, if we think we found it,
60 # otherwise set up the replacement function.
61 AC_CHECK_FUNCS(getloadavg, [],
62 [_AC_LIBOBJ_GETLOADAVG])
64 # Some definitions of getloadavg require that the program be installed setgid.
65 AC_CACHE_CHECK(whether getloadavg requires setgid,
66 ac_cv_func_getloadavg_setgid,
67 [AC_EGREP_CPP([Yowza Am I SETGID yet],
68 [#include "$ac_lib_dir_getloadavg/getloadavg.c"
69 #ifdef LDAV_PRIVILEGED
72 ac_cv_func_getloadavg_setgid=yes,
73 ac_cv_func_getloadavg_setgid=no)])
74 if test $ac_cv_func_getloadavg_setgid = yes; then
76 AC_DEFINE(GETLOADAVG_PRIVILEGED, 1,
77 [Define if the `getloadavg' function needs to be run setuid
82 AC_SUBST(NEED_SETGID)dnl
84 if test $ac_cv_func_getloadavg_setgid = yes; then
85 AC_CACHE_CHECK(group of /dev/kmem, ac_cv_group_kmem,
86 [ # On Solaris, /dev/kmem is a symlink. Get info on the real file.
87 ac_ls_output=`ls -lgL /dev/kmem 2>/dev/null`
88 # If we got an error (system does not support symlinks), try without -L.
89 test -z "$ac_ls_output" && ac_ls_output=`ls -lg /dev/kmem`
90 ac_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, $ac_cv_group_kmem)dnl
97 if test "x$ac_save_LIBS" = x; then
100 GETLOADAVG_LIBS=`echo "$LIBS" | sed "s!$ac_save_LIBS!!"`
104 AC_SUBST(GETLOADAVG_LIBS)dnl
105 ])# AC_FUNC_GETLOADAVG