# Check for getloadavg.
-# Copyright (C) 1992, 1993, 1994, 1995, 1996, 1999, 2000, 2002, 2003,
-# 2006 Free Software Foundation, Inc.
+# Copyright (C) 1992-1996, 1999-2000, 2002-2003, 2006, 2008-2014 Free Software
+# Foundation, Inc.
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.
+#serial 6
+
# Autoconf defines AC_FUNC_GETLOADAVG, but that is obsolescent.
# New applications should use gl_GETLOADAVG instead.
-# gl_GETLOADAVG(LIBOBJDIR)
-# ------------------------
+# gl_GETLOADAVG
+# -------------
AC_DEFUN([gl_GETLOADAVG],
-[gl_have_func=no # yes means we've found a way to get the load average.
+[AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
-# Make sure getloadavg.c is where it belongs, at configure-time.
-test -f "$srcdir/$1/getloadavg.c" ||
- AC_MSG_ERROR([$srcdir/$ac_config_libobj_dir/getloadavg.c is missing])
+# Persuade glibc <stdlib.h> to declare getloadavg().
+AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
gl_save_LIBS=$LIBS
-# Check for getloadavg, but be sure not to touch the cache variable.
-(AC_CHECK_FUNC(getloadavg, exit 0, exit 1)) && gl_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 && gl_have_func=yes
+# getloadvg is present in libc on glibc >= 2.2, Mac OS X, FreeBSD >= 2.0,
+# NetBSD >= 0.9, OpenBSD >= 2.0, Solaris >= 7.
+HAVE_GETLOADAVG=1
+AC_CHECK_FUNC([getloadavg], [],
+ [gl_func_getloadavg_done=no
+
+ # 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 to test for libelf and libkvm to force the
+ # definition of SVR4 below.
+ if test $gl_func_getloadavg_done = no; then
+ AC_CHECK_LIB([elf], [elf_begin], [LIBS="-lelf $LIBS"])
+ 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" gl_func_getloadavg_done=yes])
+ fi
+
+ if test $gl_func_getloadavg_done = no; then
+ # There is a commonly available library for RS/6000 AIX.
+ # Since it is not a standard part of AIX, it might be installed locally.
+ gl_getloadavg_LIBS=$LIBS
+ LIBS="-L/usr/local/lib $LIBS"
+ AC_CHECK_LIB([getloadavg], [getloadavg],
+ [LIBS="-lgetloadavg $LIBS" gl_func_getloadavg_done=yes],
+ [LIBS=$gl_getloadavg_LIBS])
+ fi
+
+ # Set up the replacement function if necessary.
+ if test $gl_func_getloadavg_done = no; then
+ HAVE_GETLOADAVG=0
+
+ # Solaris has libkstat which does not require root.
+ AC_CHECK_LIB([kstat], [kstat_open])
+ test $ac_cv_lib_kstat_kstat_open = yes && gl_func_getloadavg_done=yes
+
+ # AIX has libperfstat which does not require root
+ if test $gl_func_getloadavg_done = no; then
+ AC_CHECK_LIB([perfstat], [perfstat_cpu_total])
+ test $ac_cv_lib_perfstat_perfstat_cpu_total = yes && gl_func_getloadavg_done=yes
+ fi
+
+ if test $gl_func_getloadavg_done = no; then
+ AC_CHECK_HEADER([sys/dg_sys_info.h],
+ [gl_func_getloadavg_done=yes
+ AC_DEFINE([DGUX], [1], [Define to 1 for DGUX with <sys/dg_sys_info.h>.])
+ AC_CHECK_LIB([dgc], [dg_sys_info])])
+ fi
+ fi])
-# 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 $gl_have_func = no; then
- AC_CHECK_LIB(elf, elf_begin, LIBS="-lelf $LIBS")
-fi
-if test $gl_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" gl_have_func=yes gl_cv_func_getloadavg_setgid=yes])
-fi
-
-if test $gl_have_func = no; then
- # There is a commonly available library for RS/6000 AIX.
- # Since it is not a standard part of AIX, it might be installed locally.
- gl_getloadavg_LIBS=$LIBS
- LIBS="-L/usr/local/lib $LIBS"
- AC_CHECK_LIB(getloadavg, getloadavg,
- [LIBS="-lgetloadavg $LIBS"], [LIBS=$gl_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, [],
- [gl_PREREQ_GETLOADAVG])
-
-# Some definitions of getloadavg require that the program be installed setgid.
-AC_CACHE_CHECK(whether getloadavg requires setgid,
- gl_cv_func_getloadavg_setgid,
-[AC_EGREP_CPP([Yowza Am I SETGID yet],
-[#define CONFIGURING_GETLOADAVG
-#include "$srcdir/$1/getloadavg.c"
-#ifdef LDAV_PRIVILEGED
-Yowza Am I SETGID yet
-#endif
-],
- gl_cv_func_getloadavg_setgid=yes,
- gl_cv_func_getloadavg_setgid=no)])
-if test $gl_cv_func_getloadavg_setgid = yes; then
- NEED_SETGID=true
- AC_DEFINE(GETLOADAVG_PRIVILEGED, 1,
- [Define to 1 if the `getloadavg' function needs to be run setuid
- or setgid.])
-else
- NEED_SETGID=false
-fi
-AC_SUBST(NEED_SETGID)dnl
-
-if test $gl_cv_func_getloadavg_setgid = yes; then
- AC_CACHE_CHECK(group of /dev/kmem, gl_cv_group_kmem,
-[ # On Solaris, /dev/kmem is a symlink. Get info on the real file.
- ac_ls_output=`ls -lgL /dev/kmem 2>/dev/null`
- # If we got an error (system does not support symlinks), try without -L.
- test -z "$ac_ls_output" && ac_ls_output=`ls -lg /dev/kmem`
- gl_cv_group_kmem=`echo $ac_ls_output \
- | sed -ne ['s/[ ][ ]*/ /g
- s/^.[sSrwx-]* *[0-9]* *\([^0-9]*\) *.*/\1/
- / /s/.* //;p']`
-])
- AC_SUBST(KMEM_GROUP, $gl_cv_group_kmem)dnl
-fi
if test "x$gl_save_LIBS" = x; then
GETLOADAVG_LIBS=$LIBS
else
fi
LIBS=$gl_save_LIBS
-AC_SUBST(GETLOADAVG_LIBS)dnl
+AC_SUBST([GETLOADAVG_LIBS])dnl
+
+# Test whether the system declares getloadavg. Solaris has the function
+# but declares it in <sys/loadavg.h>, not <stdlib.h>.
+AC_CHECK_HEADERS([sys/loadavg.h])
+if test $ac_cv_header_sys_loadavg_h = yes; then
+ HAVE_SYS_LOADAVG_H=1
+else
+ HAVE_SYS_LOADAVG_H=0
+fi
+AC_CHECK_DECL([getloadavg], [], [HAVE_DECL_GETLOADAVG=0],
+ [[#if HAVE_SYS_LOADAVG_H
+ # include <sys/loadavg.h>
+ #endif
+ #include <stdlib.h>]])
])# gl_GETLOADAVG
# gl_PREREQ_GETLOADAVG
# --------------------
-# Set up the AC_LIBOBJ replacement of `getloadavg'.
+# Set up the AC_LIBOBJ replacement of 'getloadavg'.
AC_DEFUN([gl_PREREQ_GETLOADAVG],
-[AC_LIBOBJ(getloadavg)
-AC_DEFINE(C_GETLOADAVG, 1, [Define to 1 if using `getloadavg.c'.])
+[
# Figure out what our getloadavg.c needs.
-gl_have_func=no
-AC_CHECK_HEADER(sys/dg_sys_info.h,
-[gl_have_func=yes
- AC_DEFINE(DGUX, 1, [Define to 1 for DGUX with <sys/dg_sys_info.h>.])
- AC_CHECK_LIB(dgc, dg_sys_info)])
+
+AC_CHECK_HEADERS_ONCE([sys/param.h])
+
+# On HPUX9, an unprivileged user can get load averages this way.
+if test $gl_func_getloadavg_done = no; then
+ AC_CHECK_FUNCS([pstat_getdynamic], [gl_func_getloadavg_done=yes])
+fi
# We cannot check for <dwarf.h>, because Solaris 2 does not use dwarf (it
# uses stabs), but it is still SVR4. We cannot check for <elf.h> because
# Irix 4.0.5F has the header but not the library.
-if test $gl_have_func = no && test "$ac_cv_lib_elf_elf_begin" = yes; then
- gl_have_func=yes
- AC_DEFINE(SVR4, 1, [Define to 1 on System V Release 4.])
+if test $gl_func_getloadavg_done = no && test "$ac_cv_lib_elf_elf_begin" = yes \
+ && test "$ac_cv_lib_kvm_kvm_open" = yes; then
+ gl_func_getloadavg_done=yes
+ AC_DEFINE([SVR4], [1], [Define to 1 on System V Release 4.])
fi
-if test $gl_have_func = no; then
- AC_CHECK_HEADER(inq_stats/cpustats.h,
- [gl_have_func=yes
- AC_DEFINE(UMAX, 1, [Define to 1 for Encore UMAX.])
- AC_DEFINE(UMAX4_3, 1,
- [Define to 1 for Encore UMAX 4.3 that has <inq_status/cpustats.h>
- instead of <sys/cpustats.h>.])])
+if test $gl_func_getloadavg_done = no; then
+ AC_CHECK_HEADER([inq_stats/cpustats.h],
+ [gl_func_getloadavg_done=yes
+ AC_DEFINE([UMAX], [1], [Define to 1 for Encore UMAX.])
+ AC_DEFINE([UMAX4_3], [1],
+ [Define to 1 for Encore UMAX 4.3 that has <inq_status/cpustats.h>
+ instead of <sys/cpustats.h>.])])
fi
-if test $gl_have_func = no; then
- AC_CHECK_HEADER(sys/cpustats.h,
- [gl_have_func=yes; AC_DEFINE(UMAX)])
+if test $gl_func_getloadavg_done = no; then
+ AC_CHECK_HEADER([sys/cpustats.h],
+ [gl_func_getloadavg_done=yes; AC_DEFINE([UMAX])])
fi
-if test $gl_have_func = no; then
- AC_CHECK_HEADERS(mach/mach.h)
+if test $gl_func_getloadavg_done = no; then
+ AC_CHECK_HEADERS([mach/mach.h])
fi
-AC_CHECK_HEADERS(nlist.h,
+AC_CHECK_HEADERS([nlist.h],
[AC_CHECK_MEMBERS([struct nlist.n_un.n_name],
- [AC_DEFINE(NLIST_NAME_UNION, 1,
- [Define to 1 if your `struct nlist' has an
- `n_un' member. Obsolete, depend on
- `HAVE_STRUCT_NLIST_N_UN_N_NAME])], [],
- [@%:@include <nlist.h>])
+ [], [],
+ [@%:@include <nlist.h>])
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <nlist.h>]],
+ [[struct nlist x;
+ #ifdef HAVE_STRUCT_NLIST_N_UN_N_NAME
+ x.n_un.n_name = "";
+ #else
+ x.n_name = "";
+ #endif]])],
+ [AC_DEFINE([N_NAME_POINTER], [1],
+ [Define to 1 if the nlist n_name member is a pointer])])
])dnl
])# gl_PREREQ_GETLOADAVG
projects / gnulib.git / blobdiff