diff options
Diffstat (limited to 'm4/getloadavg.m4')
| -rw-r--r-- | m4/getloadavg.m4 | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/m4/getloadavg.m4 b/m4/getloadavg.m4 new file mode 100644 index 0000000..c9f5a6d --- /dev/null +++ b/m4/getloadavg.m4 @@ -0,0 +1,159 @@ +# Check for getloadavg. + +# Copyright (C) 1992-1996, 1999-2000, 2002-2003, 2006, 2008-2018 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 8 + +# Autoconf defines AC_FUNC_GETLOADAVG, but that is obsolescent. +# New applications should use gl_GETLOADAVG instead. + +# gl_GETLOADAVG +# ------------- +AC_DEFUN([gl_GETLOADAVG], +[AC_REQUIRE([gl_STDLIB_H_DEFAULTS]) + +# Persuade glibc <stdlib.h> to declare getloadavg(). +AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) + +gl_save_LIBS=$LIBS + +# getloadavg 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 $gl_func_getloadavg_done = no; then + AC_CHECK_HEADER([sys/dg_sys_info.h], + [gl_func_getloadavg_done=yes + AC_DEFINE([DGUX], [1], [Define to 1 for DGUX with <sys/dg_sys_info.h>.]) + AC_CHECK_LIB([dgc], [dg_sys_info])]) + fi + fi]) + +if test "x$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 <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 + /* OpenIndiana has a bug: <sys/time.h> must be included before + <sys/loadavg.h>. */ + # include <sys/time.h> + # include <sys/loadavg.h> + #endif + #include <stdlib.h>]]) +])# gl_GETLOADAVG + + +# gl_PREREQ_GETLOADAVG +# -------------------- +# Set up the AC_LIBOBJ replacement of 'getloadavg'. +AC_DEFUN([gl_PREREQ_GETLOADAVG], +[ +# Figure out what our getloadavg.c needs. + +AC_CHECK_HEADERS_ONCE([sys/param.h unistd.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 $gl_func_getloadavg_done = no && test "$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_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_func_getloadavg_done = no; then + AC_CHECK_HEADER([sys/cpustats.h], + [gl_func_getloadavg_done=yes; AC_DEFINE([UMAX])]) +fi + +if test $gl_func_getloadavg_done = no; then + AC_CHECK_HEADERS([mach/mach.h]) +fi + +AC_CHECK_HEADERS([nlist.h], +[AC_CHECK_MEMBERS([struct nlist.n_un.n_name], + [], [], + [@%:@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 |