RE: [ROOT] Odd behaviour of GCC

From: Philippe Canal (pcanal@fnal.gov)
Date: Wed Mar 13 2002 - 19:51:08 MET 

Hi Christian,

We noted and fixed the problem a few days ago by renaming the directory 'new'.  
To use this fix you need to delete the directory 'new' and download its replacement 
(the directory 'newdelete').

I think that your solution is more elegant :)

Cheers,
Philippe.
i.e. do 'rm -rf new; cvs update -dP'

-----Original Message-----
From: owner-roottalk@pcroot.cern.ch
[mailto:owner-roottalk@pcroot.cern.ch]On Behalf Of Christian Holm
Christensen
Sent: Wednesday, March 13, 2002 12:12 PM
To: roottalk@pcroot.cern.ch
Subject: [ROOT] Odd behaviour of GCC


Hi all, 

While trying to a compile a fresh checkout of ROOT, I get some strange
messages from GCC (`2.96'): 

  prompt% g++  -pipe -Wall -Woverloaded-virtual -fPIC -Iinclude
    -I. -DHAVE_CONFIG -D_REENTRANT -o proof/src/G__Proof.o -c
    proof/src/G__Proof.cxx 
  In file included from /usr/include/g++-3/stl_algobase.h:52,
                   from /usr/include/g++-3/stl_tree.h:56,
                   from /usr/include/g++-3/map:31,
                   from proof/inc/TProof.h:40,
                   from proof/src/G__Proof.h:31,
                   from proof/src/G__Proof.cxx:5:
  /usr/lib/gcc-lib/i386-redhat-linux/2.96/include/new.h:33:15: new is a directory

So GCC tries to include the directory <root src tree>/new as a header!
Looking at the include paths from GCC, I get 

  prompt%  g++ -v -pipe -Wall -Woverloaded-virtual -fPIC -Iinclude
    -I. -DHAVE_CONFIG -D_REENTRANT -o proof/src/G__Proof.o -c
    proof/src/G__Proof.cxx 
  ...
  #include "..." search starts here:
  #include <...> search starts here:
   include
   .
   /usr/include/g++-3
   /usr/local/include
   /usr/lib/gcc-lib/i386-redhat-linux/2.96/include
   /usr/include
  ...

I could solve it by changing the command line to 

  prompt% g++ -v -pipe -Wall -Woverloaded-virtual -fPIC -Iinclude
    -idirafter . -DHAVE_CONFIG -D_REENTRANT -o proof/src/G__Proof.o -c 
    proof/src/G__Proof.cxx 
  ...
  #include "..." search starts here:
  #include <...> search starts here:
   include
   /usr/include/g++-3
   /usr/local/include
   /usr/lib/gcc-lib/i386-redhat-linux/2.96/include
   /usr/include
   .
  
So there seems to be some problem in the Red Hat 7.2 CPP version
2.96-98.  A heads up on that one. 

This problem has probably only recently surfaced, due to the
inclussion of 

  #include <map>

in proof/inc/TProof.h 

Yours, 

Christian Holm Christensen -------------------------------------------
Address: Sankt Hansgade 23, 1. th.           Phone:  (+45) 35 35 96 91 
         DK-2200 Copenhagen N                Cell:   (+45) 28 82 16 23
         Denmark                             Office: (+45) 353  25 305 
Email:   cholm@nbi.dk                        Web:    www.nbi.dk/~cholm

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