Ktjet and Root (cygwin on winXP)

ROOT
1

Hello,
I’d like to use the ktjet package within root. I tried with cygwin on my laptop (winXP) but don’t know really how… Help is wellcome!
This is what I did:

  1. installed cygwin today (latest version) on my laptop and root binaries (WindowsXP/NT/w2000 with CYGWIN and gcc3.2 version 4.00/06a)

  2. root is ok up running (only problem is “ldd: not found”, which is mentioned on RootTalk but no solution yet?)

  3. installed CLHEP needed to compile ktjet: wwwasd.web.cern.ch/wwwasd/lhc++/ … .8.2.0.tgz and everything seems OK

  4. installed ktjet, compiled and tested with example from the site: jetweb.hep.ucl.ac.uk/ktjet/index.html (see download and example links). Everything is OK and I have the library libKtEvent.a which is what I’d like to use from root and cint

  5. Run root and tried (is that the right thing to do?):
    root [0] gSystem->Load(“libKtEvent”)
    dlopen error: dlopen, Win32 error 193
    Load Error: Failed to load Dynamic link library /home/santocch/ktjet/lib/./libKtEvent.a
    (int)(-1)
    *** Interpreter error recovered ***

Now what? I don’t have much experience so I need some hint on this problem…
Thank you

Attilio

2

You should link a shared lib libKtEvent.so and not an archive lib libKtEvent.a

Rene

3

OK, thank you for the answear…
I tried to build the shared librarly for ktjet and I know that this is probably not the right place but maybe someone is able to help:
I tried to use ld -shared to build the shared library but I get errors…
Could someone provide an example of makefile to use with the ktjet package to build the shared library?
Thank you again…

Attilio

4

Hi Attilo,
clhep doesn’t know automatically how to build for cygwin. You have to run

GXX=g++ LD=g++ LDFLAGS=shared CXXFLAGS= ./configure
Also, as you assumed, you have to modify ktjet’s makefile. You can find the libraries and the modified Makefile here [www-clued0.fnal.gov]. Keep in mind that you need a dictionary if you want to store an object of a type defined in any of these libs, or if you want to use these libs interactively. Creating a dictionary for clhep is no easy project; I’d rather suggest that you replace clhep with root in ktjet (instead of clhep’s lorentz vector you use TLorentzVector etc). Regarding your other problem:

[quote]root is ok up running (only problem is “ldd: not found”, which is mentioned on RootTalk but no solution yet?)
[/quote]
This is solved in recent root versions (see e.g. the binaries for 4.01/02).
Axel.

5

Thank you for helping… I’ll try soon all of your suggestion… (btw I suppose that you are the Axel author of the windows-root site reported on download… great work!

Attilio