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#serial 7
# A replacement for autoconf's macro by the same name. This version
# accepts an optional argument specifying the name of the $srcdir-relative
# directory in which the file getloadavg.c may be found. It is unusual
# (but justified, imho) that this file is required at ./configure time.
undefine([AC_FUNC_GETLOADAVG])
# AC_FUNC_GETLOADAVG
# ------------------
AC_DEFUN([AC_FUNC_GETLOADAVG],
[ac_have_func=no # yes means we've found a way to get the load average.
# By default, expect to find getloadavg.c in $srcdir/.
ac_lib_dir_getloadavg=$srcdir
# But if there's an argument, DIR, expect to find getloadavg.c in $srcdir/DIR.
ifval([$1], [ac_lib_dir_getloadavg=$srcdir/$1])
# Make sure getloadavg.c is where it belongs, at ./configure-time.
test -f $ac_lib_dir_getloadavg/getloadavg.c \
|| AC_MSG_ERROR([getloadavg.c is not in $ac_lib_dir_getloadavg])
# FIXME: Add an autoconf-time test, too?
ac_save_LIBS=$LIBS
# Check for getloadavg, but be sure not to touch the cache variable.
(AC_CHECK_FUNC(getloadavg, exit 0, exit 1)) && ac_have_func=yes
# On HPUX9, an unprivileged user can get load averages through this function.
AC_CHECK_FUNCS(pstat_getdynamic)
# Solaris has libkstat which does not require root.
AC_CHECK_LIB(kstat, kstat_open)
test $ac_cv_lib_kstat_kstat_open = yes && ac_have_func=yes
# Some systems with -lutil have (and need) -lkvm as well, some do not.
# On Solaris, -lkvm requires nlist from -lelf, so check that first
# to get the right answer into the cache.
# For kstat on solaris, we need libelf to force the definition of SVR4 below.
if test $ac_have_func = no; then
AC_CHECK_LIB(elf, elf_begin, LIBS="-lelf $LIBS")
fi
if test $ac_have_func = no; then
AC_CHECK_LIB(kvm, kvm_open, LIBS="-lkvm $LIBS")
# Check for the 4.4BSD definition of getloadavg.
AC_CHECK_LIB(util, getloadavg,
[LIBS="-lutil $LIBS" ac_have_func=yes ac_cv_func_getloadavg_setgid=yes])
fi
if test $ac_have_func = no; then
# There is a commonly available library for RS/6000 AIX.
# Since it is not a standard part of AIX, it might be installed locally.
ac_getloadavg_LIBS=$LIBS
LIBS="-L/usr/local/lib $LIBS"
AC_CHECK_LIB(getloadavg, getloadavg,
[LIBS="-lgetloadavg $LIBS"], [LIBS=$ac_getloadavg_LIBS])
fi
# Make sure it is really in the library, if we think we found it,
# otherwise set up the replacement function.
AC_CHECK_FUNCS(getloadavg, [],
[_AC_LIBOBJ_GETLOADAVG])
# Some definitions of getloadavg require that the program be installed setgid.
AC_CACHE_CHECK(whether getloadavg requires setgid,
ac_cv_func_getloadavg_setgid,
[AC_EGREP_CPP([Yowza Am I SETGID yet],
[#include "$ac_lib_dir_getloadavg/getloadavg.c"
#ifdef LDAV_PRIVILEGED
Yowza Am I SETGID yet
@%:@endif],
ac_cv_func_getloadavg_setgid=yes,
ac_cv_func_getloadavg_setgid=no)])
if test $ac_cv_func_getloadavg_setgid = yes; then
NEED_SETGID=true
AC_DEFINE(GETLOADAVG_PRIVILEGED, 1,
[Define if the `getloadavg' function needs to be run setuid
or setgid.])
else
NEED_SETGID=false
fi
AC_SUBST(NEED_SETGID)dnl
if test $ac_cv_func_getloadavg_setgid = yes; then
AC_CACHE_CHECK(group of /dev/kmem, ac_cv_group_kmem,
[ # On Solaris, /dev/kmem is a symlink. Get info on the real file.
ac_ls_output=`ls -lgL /dev/kmem 2>/dev/null`
# If we got an error (system does not support symlinks), try without -L.
test -z "$ac_ls_output" && ac_ls_output=`ls -lg /dev/kmem`
ac_cv_group_kmem=`echo $ac_ls_output \
| sed -ne ['s/[ ][ ]*/ /g;
s/^.[sSrwx-]* *[0-9]* *\([^0-9]*\) *.*/\1/;
/ /s/.* //;p;']`
])
AC_SUBST(KMEM_GROUP, $ac_cv_group_kmem)dnl
fi
if test "x$ac_save_LIBS" = x; then
GETLOADAVG_LIBS=$LIBS
else
GETLOADAVG_LIBS=`echo "$LIBS" | sed "s!$ac_save_LIBS!!"`
fi
AC_SUBST(GETLOADAVG_LIBS)dnl
])# AC_FUNC_GETLOADAVG
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