> I just started using Rome v2.7 and Root v5.14.00. I have run into a rather
> interesting issue trying to compile my analyzer. I tracked the problem to the
> fact that both Root and Rome are loading their own version of a header file
> called TArrayL64.h. The content of the two files are essentially identical. I
> solved the problem by changing the conditional at the start of the file
> $ROMESYS/include/TArrayL64.h from
> 
> #ifndef TArrayL64_H
> #define TArrayL64_H
> 
> to
> 
> #ifndef ROOT_TArrayL64
> #define ROOT_TArrayL64
> 
> The latter is what I found in the Root version of the file. Now it only gets
> loaded once. I looked at the svn sources that I just updated and it also uses
> TArrayL64_H.
> 
> Question, why are there two copies.
> 
> UPDATE 2-21-07:
> It seems that Root was the cause of this. Rome has used this header for some
> time, but earlier versions of Root did not include it.


As you already mentioned the older root version didn't include this header. But we
needed to include it in rome earlier. Now we still have it in the rome
distribution to be compatible with the older root versions.

There should not be any problem with this header in the current rome version. If
you have compilation problems do a  make distclean  and try again.