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dnl This file is intended for use both internally in libgtop and in every program
dnl that wants to use it.
dnl
dnl It defines the following variables:
dnl
dnl * 'libgtop_sysdeps_dir'    - sysdeps dir for libgtop.
dnl * 'libgtop_use_machine_h'  - some of system dependend parts of libgtop provide
dnl                              their own header file. In this case we need to
dnl                              define 'HAVE_GLIBTOP_MACHINE_H'.
dnl * 'libgtop_need_server'    - is the server really needed? Defines 'NEED_LIBGTOP'
dnl                              if true; defines conditional 'NEED_LIBGTOP'.

AC_DEFUN([GNOME_LIBGTOP_SYSDEPS],[
    AC_REQUIRE([AC_CANONICAL_HOST])

    AC_SUBST(libgtop_sysdeps_dir)
    AC_SUBST(libgtop_use_machine_h)
    AC_SUBST(libgtop_need_server)

    AC_ARG_WITH(libgtop-examples,
    [  --with-libgtop-examples Build the libgtop examples (default=no)],[
    build_examples="$withval"], [build_examples=no])

    AM_CONDITIONAL(EXAMPLES, test x"$build_examples" = xyes)


    AC_ARG_WITH(libgtop-smp,
    [  --with-libgtop-smp      Enable SMP support (default-auto)],[
    libgtop_smp="$withval"],[libgtop_smp=auto])

    if test $libgtop_smp = auto ; then
      AC_MSG_CHECKING(whether to enable SMP support)
      AC_TRY_RUN([
#include <sys/utsname.h>
#include <string.h>

int
main (void)
{
    struct utsname name;

    if (uname (&name)) exit (1);

    exit (strstr (name.version, "SMP") ? 0 : 1);
}
], libgtop_smp=yes, libgtop_smp=no, libgtop_smp=no)
      AC_MSG_RESULT($libgtop_smp)
    fi

    if test $libgtop_smp = yes ; then
      AC_DEFINE(HAVE_LIBGTOP_SMP)
    fi

    AM_CONDITIONAL(LIBGTOP_SMP, test $libgtop_smp = yes)

    AC_MSG_CHECKING(for libgtop sysdeps directory)

    case "$host_os" in
    linux*)
      if test x$linux_table = xyes ; then
        libgtop_sysdeps_dir=kernel
        libgtop_use_machine_h=no
      else
        libgtop_sysdeps_dir=linux
        libgtop_use_machine_h=no
        libgtop_have_sysinfo=yes
      fi
      libgtop_need_server=no
      ;;
    sunos4*)
      libgtop_sysdeps_dir=sun4
      libgtop_use_machine_h=yes
      libgtop_need_server=yes
      ;;
    osf*)
      libgtop_sysdeps_dir=osf1
      libgtop_use_machine_h=yes
      libgtop_need_server=yes
      ;;
    freebsd*)
      libgtop_sysdeps_dir=freebsd
      libgtop_use_machine_h=yes
      libgtop_need_server=yes
      libgtop_postinstall='chgrp kmem $(bindir)/libgtop_server && chmod 2755 $(bindir)/libgtop_server'
      ;;
    *)
      libgtop_sysdeps_dir=stub
      libgtop_use_machine_h=no
      libgtop_need_server=no
      ;;
    esac

    test -z "$libgtop_postinstall" && libgtop_postinstall=:

    AC_MSG_RESULT($libgtop_sysdeps_dir)

    AC_SUBST(libgtop_sysdeps_dir)
    AC_SUBST(libgtop_postinstall)
    AC_SUBST(libgtop_have_sysinfo)

    case "$host_os" in
    *bsd*)
      AC_CHECK_HEADERS(net/if_var.h)
      AC_MSG_CHECKING([for I4B])
      AC_TRY_COMPILE([
#include <sys/types.h>
#include <sys/socket.h>

#include <net/if.h>
#include <net/if_types.h>

#ifdef HAVE_NET_IF_VAR_H
#include <net/if_var.h>
#endif

#include <net/netisr.h>
#include <net/route.h>

#ifdef __FreeBSD__
#include <net/if_sppp.h>
#else
#include <i4b/sppp/if_sppp.h>
#endif
],[
    size_t size = sizeof (struct sppp);
], have_i4b=yes, have_i4b=no)
      AC_MSG_RESULT($have_i4b)
      if test x$have_i4b = xyes; then
        AC_DEFINE(HAVE_I4B)
        AC_MSG_CHECKING([for I4B accounting])
        AC_TRY_COMPILE([
#include <sys/types.h>
#include <sys/socket.h>

#include <net/if.h>
#include <net/if_types.h>

#ifdef HAVE_NET_IF_VAR_H
#include <net/if_var.h>
#endif

#include <net/netisr.h>
#include <net/route.h>

#ifdef __FreeBSD__
#include <net/if_sppp.h>
#else
#include <i4b/sppp/if_sppp.h>
#endif

#include <machine/i4b_acct.h>
],[
    size_t size = sizeof (struct i4bisppp_softc);
], have_i4b_acct=yes, have_i4b_acct=no)
        AC_MSG_RESULT($have_i4b_acct)
        if test x$have_i4b_acct = xyes ; then
          AC_DEFINE(HAVE_I4B_ACCT)
        else
          AC_WARN([
*** I4B accounting disabled - you won't get any PPP statistics.
*** Read "misc/i4b_acct.txt" in the LibGTop source directory
*** to see how to enable it.])
        fi
      fi
      ;;
    linux*)
      AC_ARG_WITH(linux-table,
      [  --with-linux-table      Use the table () function from Martin Baulig],[
      linux_table="$withval"],[linux_table=auto])
      if test $linux_table = yes ; then
        AC_CHECK_HEADER(linux/table.h, linux_table=yes, linux_table=no)
      elif test $linux_table = auto ; then
        AC_MSG_CHECKING(for table function in Linux Kernel)
        AC_TRY_RUN([
#include <stdio.h>
#include <stdlib.h>

#include <unistd.h>
#include <linux/unistd.h>
#include <linux/table.h>

#include <syscall.h>

static inline _syscall3 (int, table, int, type, union table *, tbl, const void *, param);

int
main (void)
{
    union table tbl;
    int ret;

    ret = table (TABLE_VERSION, NULL, NULL);

    if (ret == -1)
        exit (-errno);

    exit (ret < 1 ? ret : 0);
}
], linux_table=yes, linux_table=no, linux_table=no)
        AC_MSG_RESULT($linux_table)
      fi
      if test $linux_table = yes ; then
        AC_DEFINE(HAVE_LINUX_TABLE)
      fi
      AM_CONDITIONAL(LINUX_TABLE, test $linux_table = yes)

      os_major_version=`uname -r | \
        sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
      os_minor_version=`uname -r | \
        sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
      os_micro_version=`uname -r | \
        sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
      os_version_expr="$os_major_version 65536 * $os_minor_version 256 * + $os_micro_version + p q"

      AC_CHECK_HEADERS(linux/version.h, have_linux_version_h=yes,
        have_linux_version_h=no)

      if test x$have_linux_version_h = xyes ; then
        version_code=`cat /usr/include/linux/version.h | \
          grep \#define | grep LINUX_VERSION_CODE`
        os_version_code=`echo $version_code | \
          sed 's/^.*LINUX_VERSION_CODE[[ \t]]*\([[0-9]]*\).*$/\1/'`
      else
        os_version_code=`echo "$os_version_expr" | dc`
      fi

      AC_MSG_CHECKING(for Linux kernel version code)
      AC_DEFINE_UNQUOTED(GLIBTOP_LINUX_VERSION_CODE, $os_version_code)
      AC_MSG_RESULT($os_version_code)
      ;;
    esac

    AC_MSG_CHECKING(for machine.h in libgtop sysdeps dir)
    AC_MSG_RESULT($libgtop_use_machine_h)

    AC_MSG_CHECKING(whether we need libgtop)
    AC_MSG_RESULT($libgtop_need_server)

    if test x$libgtop_need_server = xyes ; then
      AC_DEFINE(NEED_LIBGTOP)
    fi

    if test x$libgtop_use_machine_h = xyes ; then
      AC_DEFINE(HAVE_GLIBTOP_MACHINE_H)
    fi

    AM_CONDITIONAL(NEED_LIBGTOP, test x$libgtop_need_server = xyes)
])