Rene Brun wrote: > > Hi Christian, > It seems that you compiled Root with the wrong options. > The egcs compiler option -fno-rtti was probably missing. > In our Makefile for Linux egcs, the CXXFLAGS parameter is > CXXFLAGS = -Wall -fPIC -DR__GLIBC -fno-rtti -fno-exceptions > I apologize for this very naive question but, why is it so important to have the same flags when compiling our libraries than the ones that were used to compile ROOT ? It seems to me I spend my year long linking binaries with libraries for which I have no idea of what flags were used .. I had a similar problem than Christian on Debian 2.0, with gcc, root was working, Compiling test was working, but not the follwoing case: I was using two different classes, compiled into two different shared libraries, the second class was using objects of the first one. When I was loading those 2 libraries interactively in root (cint), and when I was trying to use objects of the second class, references to the first one were not resolved. (not to say I was using the same flags that in test to compile those libraries) Would it be usefull to have an exemple of this type in test, like for exemple having the Class Track being compiled into a separate shared library than Event ? I also tried to recompiled ROOT with the Makefile provided for this version of Debian & gcc, but the result was core dumping, at this point I gave up, thinking something is really messed up in this linux Box. Since I am writing this mail, I have another comment: I am really willing to use the container classes provided by ROOT. I am quite new to C++, in the tutorial 37.Using the Collection Classes, I see that there are many of them, and when I browse through their descriptions I just realise the extent of my ignorance in C++, I don't precisely know what a hash table, nor a double link list, nor a map are, (I can guess, but I would feel more confortable with a sound definitions), nor am I confident with the relationship between a Class and its corresponding Iter class (why is there one sometimes, none in other cases ??) It is also difficult to browse through several mother classes to get what a container class does. Where could I got some sort of introduction to all the concepts that are used in the container classes ? Wouldn't it help a lot of us if such an introduction was provided in root documentation, (or a link to documentations available on the webb) ? thanks a lot, eric PS: Since it looks like I only complain in this mail, let me add that I do think ROOT is a great project. -- ----- Eric Anciant ------------ DAPNIA/SPhN - Bat 703 - Orme des merisiers CE-SACLAY - 91191 GIF-SUR-YVETTE Cedex - FRANCE Office: (33 - 1) 69 08 22 47 fax: (33-1) 69 08 75 84
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