Re: problem at compilation with a derivative of TSelector

From: Marc Escalier <escalier_at_lal.in2p3.fr>
Date: Tue, 13 Jul 2010 22:37:32 +0200


thanks Rene,

it works, thanks to your help

but if you have time, may i understand the following behaviour :

*one produces a dictionnary .so, for example in a "non compiled" program with
mychain_data->Process("SelectorTest.C+")

*then, put the dependencies in the Makefile

*then the compiled program works (doesn't crash) only if i put : mychain_data->Process("SelectorTest.C+")

==>whereas if i put in the compiled program : mychain_data->Process("SelectorTest.C") // here without the "+" because the .so yet exists.

then it crashes :
would you know why ?

(just in case, full log here :
/afs/cern.ch/user/e/escalier/public/MinimalSelector

it crashes at this instruction (of the compiled program) : mychain_data->Process("SelectorTest.C")

putting some prints, i see that it doesn't do begin the "Begin" of the selector

i put a complete log : "crash.txt"
(i had to do LD_LIBRARY_PATH=$LD_LIBRARY_PATH:. before to launch the program
)

         Inferior 1 [process 14683] will be detached.)


On Tue, 13 Jul 2010, Rene Brun wrote: 
> Marc,
>
> You need to generate a dictionary for your selector class. If you do not know 
> how to do it, I strongly recommend to use ACLIC in teh following way that 
> will automatically generate the dictionary for you and also the processing 
> will be faster.
>
> Replace your main.C by mymain.C as
> int mymain()
> {
> TChain *mychain_data=new TChain("PAUReco");
> mychain_data->Add("ntuple.root");
>
> return mychain_data->Process("SelectorTest.C+"); //note the "+"
> }
>
> and execute it with
> root -l mymain.C
>
> Rene Brun
>
> Marc Escalier wrote:
>> Dear Rooters,
>> 
>> i occur a problem of compilation when using a class created with a 
>> MakeSelector :
>> 
>> SelectorTest.o: In function `SelectorTest::IsA() const':
>> SelectorTest.C:(.text._ZNK12SelectorTest3IsAEv[SelectorTest::IsA() 
>> const]+0x7): undefined reference to `SelectorTest::Class()'
>> SelectorTest.o:(.rodata._ZTV12SelectorTest[vtable for SelectorTest]+0xe8): 
>> undefined reference to `SelectorTest::ShowMembers(TMemberInspector&, 
>> char*)'
>> SelectorTest.o:(.rodata._ZTV12SelectorTest[vtable for SelectorTest]+0xec): 
>> undefined reference to `SelectorTest::Streamer(TBuffer&)'
>> 
>> while i don't occur with one created with MakeClass()
>> 
>> Theses members are not in the class SelectorTest but rather in the TObject 
>> from which SelectorTest derivates
>> An expert told me that the reason would be that the class created by 
>> MakeSelector would derive from "TObject"...
>> 
>> would you have an idea of what is missing in my code and/or Makefile ?
>> 
>> To make you loose the less time possible, i provide a very minimum 
>> standalone example here :
>> lxplus :
>> 
>> /afs/cern.ch/user/e/escalier/public/MinimalSelector
>> 
>> any suggestion would be appreciated
>> 
>> Thank you
>> 
>> (
>> just in case you would not have time to see the code on lxplus, the 
>> Makefile is :
>> main: SelectorTest.o main.o
>>       /bin/rm -f main
>>       g++ -o main `root-config --ldflags --libs --glibs` -lRooFit 
>> -lRooFitCore -lMinuit main.o SelectorTest.o
>> 
>> SelectorTest.o: SelectorTest.C
>>       g++ -c `root-config --cflags` SelectorTest.C
>> 
>> main.o: main.C
>>       g++ -c `root-config --cflags` main.C
>> 
>> clean: /bin/rm *.o
>> )
>> 
>
>
Received on Tue Jul 13 2010 - 22:37:38 CEST

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