Zabbix

# LIBMODBUS_CHECK_CONFIG ([DEFAULT-ACTION])

#

# Copyright (C) 2001-2025 Zabbix SIA

#

# This program is free software: you can redistribute it and/or modify it under the terms of

# the GNU Affero General Public License as published by the Free Software Foundation, version 3.

#

# This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;

# without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

# See the GNU Affero General Public License for more details.

#

# You should have received a copy of the GNU Affero General Public License along with this program.

# If not, see <https://www.gnu.org/licenses/>.

#

​

AC_DEFUN([LIBMODBUS30_TRY_LINK],

[

AC_LINK_IFELSE([AC_LANG_PROGRAM([[

#include "modbus.h"

]], [[

  modbus_t  *mdb_ctx;

  mdb_ctx = modbus_new_tcp("127.0.0.1", 502);

  modbus_set_response_timeout(mdb_ctx, NULL);

]])],[found_libmodbus="30"],[])

])dnl

​

AC_DEFUN([LIBMODBUS31_TRY_LINK],

[

AC_LINK_IFELSE([AC_LANG_PROGRAM([[

#include "modbus.h"

]], [[

  modbus_t  *mdb_ctx;

  mdb_ctx = modbus_new_tcp("127.0.0.1", 502);

  modbus_set_response_timeout(mdb_ctx, 1, 0)

]])],[found_libmodbus="31"],[])

])dnl

​

AC_DEFUN([LIBMODBUS_ACCEPT_VERSION],

[

    AC_PROG_AWK

​

  _lib_version_parse="eval $AWK '{split(\$NF,A,\".\"); X=256*256*A[[1]]+256*A[[2]]+A[[3]]; print X;}'"

  _lib_version=`echo ifelse([$1],,[0],[$1]) | $_lib_version_parse`

  _lib_wanted=`echo ifelse([$2],,[0],[$2]) | $_lib_version_parse`

​

  if test $_lib_wanted -gt 0; then

    AC_CACHE_CHECK([for libmodbus $1 >= version $2],

      [libmodbus_cv_version_ok],[

        if test $_lib_version -lt $_lib_wanted; then

          AC_MSG_ERROR([libmodbus version mismatch])

        else

          libmodbus_cv_version_ok="yes"

        fi

      ]

    )

  fi

])dnl

​

AC_DEFUN([LIBMODBUS_CHECK_CONFIG],

[

  AC_ARG_WITH(libmodbus,[

If you want to use MODBUS based checks:

AS_HELP_STRING([--with-libmodbus@<:@=DIR@:>@],[use MODBUS package @<:@default=no@:>@, DIR is the MODBUS library install directory.])],