path: root/macros/gnome-libgtop-sysdeps.m4

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(linux-table,
    [  --with-linux-table      Use the table () function from Martin Baulig],[
    linux_table="$withval"],[linux_table=auto])

    AC_MSG_CHECKING(for table function in Linux Kernel)

    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_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)
    fi

    AC_MSG_RESULT($linux_table)

    if test $linux_table = yes ; then
      AC_DEFINE(HAVE_LINUX_TABLE)
    fi

    AM_CONDITIONAL(LINUX_TABLE, test $linux_table = 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=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
      ;;
    *)
      libgtop_sysdeps_dir=stub
      libgtop_use_machine_h=no
      libgtop_need_server=no
      ;;
    esac

    AC_MSG_RESULT($libgtop_sysdeps_dir)

    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)
])