Experimental Physics and
Industrial Control System

On Aug 10, 2020, at 2:00 PM, David A. Slimmer via Tech-talk <tech-talk at aps.anl.gov> wrote:

I’ve been trying to track down the reason for multiple inclusions of the xxxMain.o when I build a library.

The output of the build looks like this:

 

/usr/bin/ar -rc    libaaitest.a      devAaiIQM.o aaitest_registerRecordDeviceDriver.o aaitestMain.o aaitestMain.o

 

Where aaitestMain.o appears twice, and causes a “multiple definition of ‘main’ “ problem.

 

Here is my App/src/Makefile:

# Build an IOC support library

 

LIBRARY_IOC += aaitest

aaitest_SRCS += devAaiIQM.cpp

# Build the IOC application

 

PROD_IOC = aaitest

aaitest_SRCS += aaitest_registerRecordDeviceDriver.cpp

aaitest_SRCS_DEFAULT += aaitestMain.cpp

aaitest_SRCS_vxWorks += -nil-

Any ideas would be appreciated –

You need to rename either your library or your IOC binary, since both of them use the same aaitest_SRCS variable to tell the build what source files to compile for the target object.

HTH,

- Andrew