[ROOT] Macro file extension problem

From: Gerco Onderwater (onderwat@npl.uiuc.edu)
Date: Tue Mar 26 2002 - 18:30:26 MET 

Hi Rooters,

I got some peculiar results recently while using different extension on my
macro files. I'm using versions 3.02/07 and 3.03/02, "Intel x86 Linux for
Redhat 6.1 (glibc 2.1) and gcc2.95.2, version 3.03/02", both precompiled
or locally compiled on debian linux.

Here is my problem. I try to create some simple histogram from a macro:

void macro1()
{
  TFile* outfile = new TFile("rest.root","recreate"); 
  TH1F* exxp = new TH1F("exxp","exxp",1,0,1);
  outfile->Write();
  outfile->Close();
}

When stored in a file named macro1.c I get

root [0] .L macro1.c
root [1] macro1()

 *** Break *** segmentation violation
Root > Function macro1() busy flag cleared

or

root [0] .x macro1.c 

 *** Break *** segmentation violation
Root > Function macro1() busy flag cleared

HOWEVER, when I put the same macro in a file called macro1.cpp everything
works just fine.

But then, after quitting and restarting root, when I try to read my little
sample histogram with the following macro:

macro2()
{
  TFile* f = new TFile("test.root");
  TH2F* h = (TH2F*)f->Get("exxp");
}

I get this:

root [0] .L macro2.c
root [1] macro2()

WARNING, the StreamerInfo of class TH1 read from file test.root
        has the same version (=4) as the active class
        but a different checksum.
        You should update the version to ClassDef(TH1,5).
        Do not try to write objects with the current class definition,
        the files will not be readable.


WARNING, the StreamerInfo of class TAxis read from file test.root
        has the same version (=7) as the active class
        but a different checksum.
        You should update the version to ClassDef(TAxis,8).
        Do not try to write objects with the current class definition,
        the files will not be readable.


WARNING, the StreamerInfo of class THashList read from file test.root
        has the same version (=0) as the active class
        but a different checksum.
        You should update the version to ClassDef(THashList,1).
        Do not try to write objects with the current class definition,
        the files will not be readable.


WARNING, the StreamerInfo of class TCollection read from file test.root
        has the same version (=3) as the active class
        but a different checksum.
        You should update the version to ClassDef(TCollection,4).
        Do not try to write objects with the current class definition,
        the files will not be readable.


whereas using the extension .cpp seems to work OK:

root [0] .L macro2.cpp 
root [1] macro2()
root [2] 

What is going on!??!? Am I doing something stupid or is CINT broken?

Greetings,

-- Gerco

Dr. C.J.G. Onderwater, VRAP
Nuclear Physics Laboratory
476 Loomis Laboratory of Physics
University of Illinois at Urbana-Champaign
1110 West Green Street
Urbana, IL 61801-3080     
Phone : (217) 244-7363
Fax   : (217) 333-1215  
E-mail: onderwat@uiuc.edu

This archive was generated by hypermail 2b29 : Sat Jan 04 2003 - 23:50:47 MET