Dear colleagues,
A happy new year 2023.
I am trying to build O2 from scratch after a long break. I started from scratch (removing everything in /sw, starting).
The compilation runs through surprisingly nearly through, it crashes in the end with XrootD. The log is in this cernbox folder named XrootD.txt : CERNBox
AliDoctor-log of ¨aliDoctor o2 --defaults o2 ¨ is given in the same cernbox folder: AliDoctor.txt
My operating system is ubuntu Ubuntu 20.04.5 LTS. aliDist is from yesterday (tried to solve the problem by modifying openssl version or xrootd version, same crash, I also reinstalled openssl with different versions, didn´t help, but also not worse).
If I try to compile without xrootD, the O2 compilation: aliBuild build O2 --defaults o2 --disable XRootD,JAliEn-ROOT -j 3
the compilation of O2 crashes with an error that I have not seen so far. It seems that it doesn´t recognise std::atomic. the corresponding library is installed on my laptop. The log is in the same cernbox folder: log_exclude.txt O2 is not exactly dev since I need to work on top of a PR that it is not yet merged, but I got the same problem with dev after 1st of January 2023.
I apologize in advance for my clumsiness presumably responsible that it doesn´t work. I am happy for any help.
In parallel, I will ask my institute to give me a completely blank machine installing ubuntu only to do O2 and continue to do detector code development without compilation .
Where can I find the most appropriate instructions for O2 (not O2Physics) to be followed precisely line by line.
I am also using ubuntu 20.04 still and I disable by default the custom OpenSSL and curl builds. In your XrootD.txt log it seems there is a crash with system OpenSSL and the version used by aliBuild.
You can do this with aliBuild build O2 --defaults o2 --disable OpenSSL,curl
I have added the following local patch to alidist to have this automatically:
The advantage is that I can load O2 and in a shell and still do ssh and git push with the environment loaded. With the aliBuild version of OpenSSL this does not work for me which is a bit annoying.
The disadvantage is that the (first) build process takes much longer, since you need to compile a lot more packages locally including clang, root, etc for which aliBuild would otherwise download precompiled packages.
in principle you should not need custom openssl, as xrootd works even with openssl 3… so the system provided one should be ok… you can also try with alibuild build --no-system
but your problem is that you need json-c packages installed (including the dev package), notice:
-- Checking for module 'json-c'
-- No package 'json-c' found
and this is strictly required
i will bump up the fixing of xrootd recipe on my todo list to solve this once and for all
Hi Adrian,
thanks a lot!
The workaround from Ole was not sufficient, indeed.
I installed now sudo apt-get install libjson-c-doc and I am recompiling: I will let you know, if it goes through.
Cheers
Michael
Hi @asevcenc,
thanks a lot for the suggestion.
Sorry for the delay in writing, I was at a workshop and my laptop could not be used to compile in a sufficient manner to test it properly.
I installed libjson-c-dev and I still have the same error in the xrootD compilation, when running without --no-system.
Without --no-system, I got the same error.
With --no-system, I am stuck at:
==> Building lz4@v1.9.3
==> lz4 is being built (use --debug for full output): failed
ERROR: Error while executing /home/mwinn/alice/sw/SPECS/ubuntu2004_x86-64/lz4/v1.9.3-1/build.sh on `dphnpcl107’.
ERROR: Log can be found in /home/mwinn/alice/sw/BUILD/lz4-latest/log
ERROR: Please upload it to CERNBox/Dropbox if you intend to request support.
ERROR: Build directory is /home/mwinn/alice/sw/BUILD/lz4-latest/lz4.
mwinn@dphnpcl107:~/alice$ less /home/mwinn/alice/sw/BUILD/lz4-latest/log
/home/mwinn/alice/sw/BUILD/lz4-latest/log: No such file or directory