Dear all

I was using CommMonitor to trace the packets between CPU and L1 cache so
far. Now I do not need to trace them. So I replaced the modified
*BaseCPU.py* and *comm_monitor.cc* files with the *original ones*.

However, when I compile gem5 with the following command:

scons build/X86/gem5.opt -j2

I get the following error:

build/X86/mem/comm_monitor.o: In function `CommMonitor':
/home/azadeh/gem5/build/X86/mem/comm_monitor.cc:59: undefined reference to
`vtable for CommMonitor'
/home/azadeh/gem5/build/X86/mem/comm_monitor.cc:59: undefined reference to
`vtable for CommMonitor'
collect2: ld returned 1 exit status
scons: *** [build/X86/gem5.opt] Error 1
scons: building terminated because of errors.

I would really like to know how I can have a successful compile again and
would appreciate any help.

Best regards
Azadeh
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