Hi,
> Does it mean, that I must restart ROOT always when I want to recompile a
> program after some changes? Is it a way to recompile program without
> restart?
The warning is related to a bug in the KCC compiler and does not apply
to other compiler.
However, if you unload a shared library, anything that uses this shared
library is potentially invalid (because code it depends on is no longer
accessible). CINT tries to make intelligent decision on what should be
invalided (and thus unloads, deletes, scratches) but does not always
gets it 'right'. This explains the disappearance of the variable 'x'.
As a rule of thumb you can assume that when you 'reload' a library
__anything__ that was created (and that CINT knows about) since the
previous load is delete/removed.
Cheers,
Philippe.
-----Original Message-----
From: owner-roottalk@pcroot.cern.ch
[mailto:owner-roottalk@pcroot.cern.ch]On Behalf Of Dmitry A. Shtol
Sent: Wednesday, August 27, 2003 11:13 PM
To: roottalk@pcroot.cern.ch
Subject: [ROOT] Recompilation of programs.
Hi,
On "ROOT education at Fermilab".
(http://www-root.fnal.gov/root/class/Day2_files/v3_document.htm)
In "ACLiC Advantages" there are following statement:
"With the KCC compiler can only load each C++ shared library once per root
session, this also means that you can not use the .U command to unload the
shared library. When adding shared libraries one after another, and then
removing one that has been added previously to others, the ones added
after the one to be removed will also be removed."
Does it mean, that I must restart ROOT always when I want to recompile a
program after some changes? Is it a way to recompile program without
restart?
When I try to do it, all varibles are deleted. Example:
(ExpEeSelect_c.so loaded before through a
command gROOT->LoadMacro("ExpEeSelect_C.so") in rootlogon.C)
root [1] double x=1
root [2] x
(double)1.00000000000000000e+00
root [3] .sh
bash$ touch ExpEeSelect.C
bash$ exit
root [4] .L ExpEeSelect.C+
Warning in <ACLiC>: unmodified script has already been compiled and loaded
Warning in <ACLiC>: it will be regenerated and reloaded!
Info in <TUnixSystem::ACLiC>: creating shared library
/home/shtol/root/./ExpEeSelect_C.so
Warning in <TClassTable::Add>: class ExpEeSelect already in TClassTable
root [5] x
Error: Symbol x is not defined in current scope FILE:(tmpfile) LINE:1
*** Interpreter error recovered ***
What I can do with this problem?
Thank you.
==============================================================
Dmitry A. Shtol (SND group)
Budker Institute of Nuclear Physics
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