Re: [ROOT] Warning message from ROOT 4.00/04

From: Hyeongryul So (alphard@ieplab.snu.ac.kr)
Date: Mon May 03 2004 - 09:55:50 MEST


Dear Rene,

yes, I had built the ROOT binaries myself because there were no official
binaries yet for Fedora Core 1. The following options were used for the
configure script.

        ./configure linux --prefix=/usr/local --enable-soversion --enable-rpath --enable-thread

The binaries were built by 'make -j5' using GNU make and installed by 'make
install' as usual. The previous version (CVS in 2004/04/25) was overwritten
during the installation.

GCC was the default one (3.3.2). The specs are shown below.

        Reading specs from /usr/lib/gcc-lib/i386-redhat-linux/3.3.2/specs
        Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --enable-shared --enable-threads=posix --disable-checking --with-system-zlib --enable-__cxa_atexit --host=i386-redhat-linux
        Thread model: posix
        gcc version 3.3.2 20031022 (Red Hat Linux 3.3.2-1)

Please let me know if there is any information missing. With these options,
the previous versions (4.00/03 and CVS) seemed to work without trouble.

Thanks,
H. So.

Rene Brun wrote:
> Hi,
> 
> I do not see any problem in reading your file with 4.00/04
> 
> Did you generate the ROOT binaries yourself? or imported one of the binaries
> on our web site? (we do not have yet a binary for Fedora Core 1)
> 
> Rene Brun
> 
> Hyeongryul So wrote:
> > 
> > Hi,
> > 
> > I have been using ROOT on my Linux box (Fedora Core 1). After upgrading my
> > installation of ROOT from 4.00/03 to 4.00/04, I received this warning
> > messages while reading files generated by the previous versions of ROOT.
> > 
> >         root [0] TFile* file = new TFile("check.root", "read")
> >         Warning in <TStreamerInfo::BuildCheck>:
> >                 The StreamerInfo of class TAttLine read from file check.root
> >                 has the same version (=1) as the active class but a different checksum.
> >                 You should update the version to ClassDef(TAttLine,2).
> >                 Do not try to write objects with the current class definition,
> >                 the files will not be readable.
> > 
> >         Warning in <TStreamerInfo::BuildCheck>:
> >                 The StreamerInfo of class TAttMarker read from file check.root
> >                 has the same version (=1) as the active class but a different checksum.
> >                 You should update the version to ClassDef(TAttMarker,2).
> >                 Do not try to write objects with the current class definition,
> >                 the files will not be readable.
> > 
> > Attached is the sample data file which contains only one histogram and was
> > generated by ROOT 4.00/03. It seems that the change in class TCint is
> > responsible for the message.
> > 
> >         2004-04-27 15:15  rdm
> >                 * meta/: inc/TCint.h, src/TCint.cxx:
> >                 use new Cint autoloading interface (G__set_class_autoloading_table()) and
> >                 callback mechanism to load the needed library (TCint::AutoLoadCallback()).
> > 
> > It worries me that the new mechanism might not be backward-compatible; is it
> > safe to use ROOT 4.00/04 with data files generated by older version of ROOT?
> > 
> > Thanks,
> > H. So.
> > 
> >   --------------------------------------------------------------------------------
> >                  Name: check.root
> >    check.root    Type: unspecified type (application/octet-stream)
> >              Encoding: base64



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