/*********************************************************************************

 *                 FreeModbus LINUXTCP Compile ERROR

 * 说明：

 *     想使用FreeModbus TCP在Ubuntu上进行测试，结果其默认没有打开TCP功能。

 *

 *                                              2018-1-2 深圳 南山平山村 曾剑锋

 ********************************************************************************/

一、参考文档：

    . http://pl.comp.lang.c.narkive.com/3s8TevOZ/problem-z-kompilacj

二、报错信息：

    /home/zengjf/freemodbus/freemodbus-v1.5.0/demo/LINUXTCP/demo.c:: undefined reference to `eMBTCPInit'

    ../../modbus/mb.o: In function `eMBInit':

    /home/zengjf/freemodbus/freemodbus-v1.5.0/demo/LINUXTCP/../../modbus/mb.c:: undefined reference to `eMBRTUStart'

    /home/zengjf/freemodbus/freemodbus-v1.5.0/demo/LINUXTCP/../../modbus/mb.c:: undefined reference to `eMBRTUStop'

    /home/zengjf/freemodbus/freemodbus-v1.5.0/demo/LINUXTCP/../../modbus/mb.c:: undefined reference to `eMBRTUSend'

    /home/zengjf/freemodbus/freemodbus-v1.5.0/demo/LINUXTCP/../../modbus/mb.c:: undefined reference to `eMBRTUReceive'

    /home/zengjf/freemodbus/freemodbus-v1.5.0/demo/LINUXTCP/../../modbus/mb.c:: undefined reference to `vMBPortClose'

    /home/zengjf/freemodbus/freemodbus-v1.5.0/demo/LINUXTCP/../../modbus/mb.c:: undefined reference to `xMBRTUReceiveFSM'

    /home/zengjf/freemodbus/freemodbus-v1.5.0/demo/LINUXTCP/../../modbus/mb.c:: undefined reference to `xMBRTUTransmitFSM'

    /home/zengjf/freemodbus/freemodbus-v1.5.0/demo/LINUXTCP/../../modbus/mb.c:: undefined reference to `xMBRTUTimerT35Expired'

    /home/zengjf/freemodbus/freemodbus-v1.5.0/demo/LINUXTCP/../../modbus/mb.c:: undefined reference to `eMBRTUInit'

    /home/zengjf/freemodbus/freemodbus-v1.5.0/demo/LINUXTCP/../../modbus/mb.c:: undefined reference to `eMBASCIIStart'

    /home/zengjf/freemodbus/freemodbus-v1.5.0/demo/LINUXTCP/../../modbus/mb.c:: undefined reference to `eMBASCIIStop'

    /home/zengjf/freemodbus/freemodbus-v1.5.0/demo/LINUXTCP/../../modbus/mb.c:: undefined reference to `eMBASCIISend'

    /home/zengjf/freemodbus/freemodbus-v1.5.0/demo/LINUXTCP/../../modbus/mb.c:: undefined reference to `eMBASCIIReceive'

    /home/zengjf/freemodbus/freemodbus-v1.5.0/demo/LINUXTCP/../../modbus/mb.c:: undefined reference to `vMBPortClose'

    /home/zengjf/freemodbus/freemodbus-v1.5.0/demo/LINUXTCP/../../modbus/mb.c:: undefined reference to `xMBASCIIReceiveFSM'

    /home/zengjf/freemodbus/freemodbus-v1.5.0/demo/LINUXTCP/../../modbus/mb.c:: undefined reference to `xMBASCIITransmitFSM'

    /home/zengjf/freemodbus/freemodbus-v1.5.0/demo/LINUXTCP/../../modbus/mb.c:: undefined reference to `xMBASCIITimerT1SExpired'

    /home/zengjf/freemodbus/freemodbus-v1.5.0/demo/LINUXTCP/../../modbus/mb.c:: undefined reference to `eMBASCIIInit'

    collect2: error: ld returned  exit status

    Makefile:: recipe for target 'tcpmodbus' failed

    make: *** [tcpmodbus] Error 

三、解决办法：

    . modified the file "freemodbus/modbus/include/mbconfig.h"

    . find the under code

           /*! \brief If Modbus ASCII support is enabled. */

           #define MB_ASCII_ENABLED ( 1 )

           /*! \brief If Modbus RTU support is enabled. */

           #define MB_RTU_ENABLED ( 1 )

           /*! \brief If Modbus TCP support is enabled. */

           #define MB_TCP_ENABLED ( 0 )

           /*! \brief The character timeout value for Modbus ASCII.

       change into

           #define MB_ASCII_ENABLED ( 0 )

           #define MB_RTU_ENABLED ( 0 )

           #define MB_TCP_ENABLED ( 1 )

四、Compile Output：

    root@localhost:/home/zengjf/freemodbus/freemodbus-v1.5.0/demo/LINUXTCP# make

    gcc -g -Wall -Iport -I../../modbus/rtu -I../../modbus/ascii -I../../modbus/include -I../../modbus/tcp -pthread -o demo.o -c demo.c

    gcc -g -Wall -Iport -I../../modbus/rtu -I../../modbus/ascii -I../../modbus/include -I../../modbus/tcp -pthread -o port/portother.o -c port/portother.c

    gcc -g -Wall -Iport -I../../modbus/rtu -I../../modbus/ascii -I../../modbus/include -I../../modbus/tcp -pthread -o port/portevent.o -c port/portevent.c

    gcc -g -Wall -Iport -I../../modbus/rtu -I../../modbus/ascii -I../../modbus/include -I../../modbus/tcp -pthread -o port/porttcp.o -c port/porttcp.c

    gcc -g -Wall -Iport -I../../modbus/rtu -I../../modbus/ascii -I../../modbus/include -I../../modbus/tcp -pthread -o ../../modbus/mb.o -c ../../modbus/mb.c

    gcc -g -Wall -Iport -I../../modbus/rtu -I../../modbus/ascii -I../../modbus/include -I../../modbus/tcp -pthread -o ../../modbus/tcp/mbtcp.o -c ../../modbus/tcp/mbtcp.c

    gcc -g -Wall -Iport -I../../modbus/rtu -I../../modbus/ascii -I../../modbus/include -I../../modbus/tcp -pthread -o ../../modbus/functions/mbfunccoils.o -c ../../modbus/functions/mbfunccoils.c

    gcc -g -Wall -Iport -I../../modbus/rtu -I../../modbus/ascii -I../../modbus/include -I../../modbus/tcp -pthread -o ../../modbus/functions/mbfuncdiag.o -c ../../modbus/functions/mbfuncdiag.c

    gcc -g -Wall -Iport -I../../modbus/rtu -I../../modbus/ascii -I../../modbus/include -I../../modbus/tcp -pthread -o ../../modbus/functions/mbfuncholding.o -c ../../modbus/functions/mbfuncholding.c

    gcc -g -Wall -Iport -I../../modbus/rtu -I../../modbus/ascii -I../../modbus/include -I../../modbus/tcp -pthread -o ../../modbus/functions/mbfuncinput.o -c ../../modbus/functions/mbfuncinput.c

    gcc -g -Wall -Iport -I../../modbus/rtu -I../../modbus/ascii -I../../modbus/include -I../../modbus/tcp -pthread -o ../../modbus/functions/mbfuncother.o -c ../../modbus/functions/mbfuncother.c

    gcc -g -Wall -Iport -I../../modbus/rtu -I../../modbus/ascii -I../../modbus/include -I../../modbus/tcp -pthread -o ../../modbus/functions/mbfuncdisc.o -c ../../modbus/functions/mbfuncdisc.c

    gcc -g -Wall -Iport -I../../modbus/rtu -I../../modbus/ascii -I../../modbus/include -I../../modbus/tcp -pthread -o ../../modbus/functions/mbutils.o -c ../../modbus/functions/mbutils.c

    gcc demo.o port/portother.o port/portevent.o port/porttcp.o ../../modbus/mb.o ../../modbus/tcp/mbtcp.o ../../modbus/functions/mbfunccoils.o ../../modbus/functions/mbfuncdiag.o ../../modbus/functions/mbfuncholding.o ../../modbus/functions/mbfuncinput.o ../../modbus/functions/mbfuncother.o ../../modbus/functions/mbfuncdisc.o ../../modbus/functions/mbutils.o   -lpthread  -o tcpmodbus

    root@localhost:/home/zengjf/freemodbus/freemodbus-v1.5.0/demo/LINUXTCP#

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