a compilation error in the aSub processing function.

[LONG FENG via Tech-talk <tech-talk at aps.anl.gov>]

Hi all,

  I encountered the following errors while writing the processing function for the aSub record.

  make -C O.linux-x86_64 -f ../Makefile TOP=../../.. \

    T_A=linux-x86_64 install
make[1]: Entering directory '/home/training/examples/dataProcessingApp/src/O.linux-x86_64'
/usr/bin/g++ -o dataProcessing  -L/home/training/examples/lib/linux-x86_64 -L/ics/tools/StreamDevice-master/lib/linux-x86_64 -L/ics/tools/asyn4-38/lib/linux-x86_64 -L/ics/tools/base-7.0.6/lib/linux-x86_64 -Wl,-rpath,/home/training/examples/lib/linux-x86_64 -Wl,-rpath,/ics/tools/StreamDevice-master/lib/linux-x86_64 -Wl,-rpath,/ics/tools/asyn4-38/lib/linux-x86_64 -Wl,-rpath,/ics/tools/base-7.0.6/lib/linux-x86_64           -rdynamic -m64         dataProcessing_registerRecordDeviceDriver.o dataProcessingMain.o    -ldbRecStd -ldbCore -lca -lCom -lasyn -lstream  
/usr/bin/ld: dataProcessing_registerRecordDeviceDriver.o: in function `dataProcessing_registerRecordDeviceDriver':
/home/training/examples/dataProcessingApp/src/O.linux-x86_64/dataProcessing_registerRecordDeviceDriver.cpp:412: undefined reference to `pvar_func_register_func_dose'
collect2: error: ld returned 1 exit status
make[1]: *** [/ics/tools/base-7.0.6/configure/RULES_BUILD:231: dataProcessing] Error 1
make[1]: Leaving directory '/home/training/examples/dataProcessingApp/src/O.linux-x86_64'
make: *** [/ics/tools/base-7.0.6/configure/RULES_ARCHS:58: install.linux-x86_64] Error 2

  My function（dose.c） content is as follows ：

#include <stdint.h>
#include <epicsExport.h>
#include <aSubRecord.h>
#include <registryFunction.h>

int dose(aSubRecord *psub) {
    char *inData;
    double *pout1, doseRate;
    unsigned char readData[4] = {0};
    double *p1, *p2;

    inData = (char *)psub->a;

    pout1 = (double *)psub->vala;
    p1 = (double *)psub->valb;
    p2 = (double *)psub->valc;

    readData[0] = inData[4];
    readData[1] = inData[3];
    readData[2] = inData[6];
    readData[3] = inData[5];

    //Convert to floating point number
    doseRate = *((float*)readData);

    // result
    *pout1 = doseRate;

    return 0;
}
epicsRegisterFunction(dose);

dose.dbd:

function(dose)

Makefile：

TOP=../..

include $(TOP)/configure/CONFIG
#----------------------------------------
#  ADD MACRO DEFINITIONS AFTER THIS LINE
#=============================

#=============================
# Build the IOC application

PROD_IOC = dataProcessing
# dataProcessing.dbd will be created and installed
DBD += dataProcessing.dbd

# dataProcessing.dbd will be made up from these files:
dataProcessing_DBD += base.dbd
dataProcessing_DBD += dose.dbd

# Build an IOC support library
LIBRARY_IOC += dataProcessingSupport

# Compile and add code to the support library
dataProcessingSupport_SRCS += dose.c

# dataProcessing_registerRecordDeviceDriver.cpp derives from dataProcessing.dbd
dataProcessing_SRCS += dataProcessing_registerRecordDeviceDriver.cpp

# Build the main IOC entry point on workstation OSs.
dataProcessing_SRCS_DEFAULT += dataProcessingMain.cpp
dataProcessing_SRCS_vxWorks += -nil-

# Add support from base/src/vxWorks if needed
#dataProcessing_OBJS_vxWorks += $(EPICS_BASE_BIN)/vxComLibrary

# Finally link to the EPICS Base libraries
dataProcessing_LIBS += $(EPICS_BASE_IOC_LIBS)

##### ADDED FOR STREAM DEVICE ############
dataProcessing_DBD += stream.dbd
dataProcessing_DBD += asyn.dbd
dataProcessing_DBD += drvAsynSerialPort.dbd

dataProcessing_LIBS += asyn
dataProcessing_LIBS += stream

#===========================
include $(TOP)/configure/RULES
#----------------------------------------
#  ADD RULES AFTER THIS LINE

  Where is the issue, and how should I resolve the error?  

Feng