Compiler Error with gcc 4.7.2

[Generic User (don't modify these fields)]

We are encountering the following error when we try to compile Sherpa 2.0.beta with gcc 4.7.2 for the CMS framework. Do you have any idea how to fix it?

make[2]: Entering directory `/user/thuer/work_sherpa_20b/SHERPA-MC-2.0.beta/PHASIC++/Process'
  CXX    SVN_Info.lo
  CXX    Process_Group.lo
In file included from Process_Group.C:1:0:
../../PHASIC++/Process/Process_Group.H:21:25: error: redeclaration of 'size_t PHASIC::PG_TID::m_b'
../../PHASIC++/Process/Process_Group.H:19:17: note: previous declaration 'double PHASIC::PG_TID::m_b'
make[2]: *** [Process_Group.lo] Error 1

Best, Sebastian

[Frank Siegert]

Hi Sebastian,

Thanks for the report, this seems to be indeed a clashing variable. We'll look into it and update the 2.0beta as soon as possible.

It seems you are compiling with --enable-multithread. Is that on purpose to speed up the integration? You might be interested in the --enable-mpi option, which you can use together with an MPI implementation like Open MPI to parallelise the integration with a better scaling behaviour, even across multiple machines on a cluster.

Cheers, Frank

[Stefan Hoeche]

Hi Sebastian,

could you try an svn update and recompile? The problem should be fixed in revision 20757.

Cheers

Stefan