X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fgetloadavg.m4;h=b75e05fa0561695f9c30d89ed598bfd133f3f436;hb=9c5e07d317077af2cfc3f0816bcc8cab03dd4260;hp=4aae158e9632b78775a9bf0ec89abec658b12383;hpb=83ca5b985b375b6445d54d99e523508f075a497e;p=gnulib.git

diff --git a/m4/getloadavg.m4 b/m4/getloadavg.m4
index 4aae158e9..b75e05fa0 100644
--- a/m4/getloadavg.m4
+++ b/m4/getloadavg.m4
@@ -7,55 +7,70 @@
 # gives unlimited permission to copy and/or distribute it,
 # with or without modifications, as long as this notice is preserved.
 
-#serial 2
+#serial 4
 
 # 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],
 [AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
 
 # Persuade glibc <stdlib.h> to declare getloadavg().
 AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
 
-# 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
 
+# getloadvg is present in libc on glibc >= 2.2, MacOS X, FreeBSD >= 2.0,
+# NetBSD >= 0.9, OpenBSD >= 2.0, Solaris >= 7.
+HAVE_GETLOADAVG=1
 AC_CHECK_FUNC([getloadavg], [],
-  [gl_have_func=no
+  [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_have_func = no; then
+   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_have_func=yes])
+       [LIBS="-lutil $LIBS" gl_func_getloadavg_done=yes])
    fi
 
-   if test $gl_have_func = no; then
+   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_have_func=yes],
+                  [LIBS="-lgetloadavg $LIBS" gl_func_getloadavg_done=yes],
                   [LIBS=$gl_getloadavg_LIBS])
    fi
 
    # Set up the replacement function if necessary.
-   if test $gl_have_func = no; then
-     AC_LIBOBJ([getloadavg])
-     gl_PREREQ_GETLOADAVG
+   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
@@ -90,52 +105,35 @@ AC_DEFUN([gl_PREREQ_GETLOADAVG],
 [
 # Figure out what our getloadavg.c needs.
 
-# 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
-
 # On HPUX9, an unprivileged user can get load averages this way.
-if test $gl_have_func = no; then
-  AC_CHECK_FUNCS([pstat_getdynamic], [gl_have_func=yes])
-fi
-
-# AIX has libperfstat which does not require root
-if test $gl_have_func = no; then
-  AC_CHECK_LIB([perfstat], [perfstat_cpu_total])
-  test $ac_cv_lib_perfstat_perfstat_cpu_total = yes && gl_have_func=yes
-fi
-
-if test $gl_have_func = no; then
-  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])])
+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 \
+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_have_func=yes
+  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
+if test $gl_func_getloadavg_done = no; then
   AC_CHECK_HEADER([inq_stats/cpustats.h],
-  [gl_have_func=yes
+  [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
+if test $gl_func_getloadavg_done = no; then
   AC_CHECK_HEADER([sys/cpustats.h],
-  [gl_have_func=yes; AC_DEFINE([UMAX])])
+  [gl_func_getloadavg_done=yes; AC_DEFINE([UMAX])])
 fi
 
-if test $gl_have_func = no; then
+if test $gl_func_getloadavg_done = no; then
   AC_CHECK_HEADERS([mach/mach.h])
 fi