sPHENIX discussion of software

[Chris Pinkenburg <pinkenburg AT bnl.gov>]

Hi folks,

I managed to get our software build with root6, I only had to add 5 
missing std::'s in front of ostreams in some header files (not sure why 
gcc accepted those headers). There is now a nightly play build with 
this, you can set yourself up by

source /opt/sphenix/core/bin/sphenix_setup.csh -n play


For every class fed through rootcling it produces a .pcm file in the 
build area which has to be installed with the libraries. This is not 
part of our Makefiles so our build script just copies those "by hand" as 
a last step. If you compile it yourself, you need to remember to do this 
as well.

Now for the bad news - there are some issues coming from cling which 
prevent to run anything of our code.

Cling needs the include files and it hardcodes the include path during 
compilation (which point to the build directory on a local disk of 
rcas2100). That prevents very effectively to load any library if you are 
not on the build machine.

But even on the build machine things currently die with:

IncrementalExecutor::executeFunction: symbol '_ZNSsC1EOSs' unresolved 
while linking [cling interface function]!
You are probably missing the definition of std::basic_string<char, 
std::char_traits<char>, std::allocator<char> >::basic_string(std::string&&)
Maybe you need to load the corresponding shared library?

I  can vaguely recall that there was a clang/gcc issue where clang 
triggered a gcc linker bug.

That's the status - if any of you are interested to bang your head 
against this and figure out how to get this to work, let me know. The 
first step would be probably to teach rootcling to use relative paths 
(which might just mean to read up how rootcling works).

Chris





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Christopher H. Pinkenburg      ; pinkenburg AT bnl.gov

Brookhaven National Laboratory ; phone: (631) 344-5692
Physics Department Bldg 510 C  ; fax:   (631) 344-3253
Upton, NY 11973-5000

http://www.phenix.bnl.gov/~pinkenbu/

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