# Check for getloadavg. # Copyright (C) 1992-1996, 1999-2000, 2002-2003, 2006, 2008-2011 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 2 # Autoconf defines AC_FUNC_GETLOADAVG, but that is obsolescent. # New applications should use gl_GETLOADAVG instead. # gl_GETLOADAVG(LIBOBJDIR) # ------------------------ AC_DEFUN([gl_GETLOADAVG], [AC_REQUIRE([gl_STDLIB_H_DEFAULTS]) # Persuade glibc to declare getloadavg(). AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) gl_have_func=no # yes means we've found a way to get the load average. # Make sure getloadavg.c is where it belongs, at configure-time. test -f "$srcdir/$1/getloadavg.c" || AC_MSG_ERROR([$srcdir/$1/getloadavg.c is missing]) gl_save_LIBS=$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 # AIX has libperfstat which does not require root AC_CHECK_LIB([perfstat], [perfstat_cpu_total]) test $ac_cv_lib_perfstat_perfstat_cpu_total = yes && gl_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 to test for libelf and libkvm to force the # definition of SVR4 below. if test $gl_have_func = 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_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=$LIBS else GETLOADAVG_LIBS=`echo "$LIBS" | sed "s!$gl_save_LIBS!!"` fi LIBS=$gl_save_LIBS AC_SUBST([GETLOADAVG_LIBS])dnl # Test whether the system declares getloadavg. Solaris has the function # but declares it in , not . 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 #endif #include ]) ])# gl_GETLOADAVG # gl_PREREQ_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 .]) AC_CHECK_LIB([dgc], [dg_sys_info])]) # We cannot check for , because Solaris 2 does not use dwarf (it # uses stabs), but it is still SVR4. We cannot check for 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 \ && test "$ac_cv_lib_kvm_kvm_open" = yes; then gl_have_func=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 instead of .])]) fi if test $gl_have_func = no; then AC_CHECK_HEADER([sys/cpustats.h], [gl_have_func=yes; AC_DEFINE([UMAX])]) fi if test $gl_have_func = no; then AC_CHECK_HEADERS([mach/mach.h]) fi 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 ]) AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include ]], [[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