openmp in 4.2.0

[Stephan Ripke <ripke@xxxxxxxxxxxxxxx>]

Hello,
i am programming c++ with a multicore-mashine. So OpenMP seems very 
useful for me. So I installed the not yet released version 4.2.0 and it 
is working fine. Even the OpenMP-Samples from other platforms (icc) are 
compiling with the option -openmp without any problem. But 
unfortunatetly, it is not using different threads, so there is no use of 
the other cores.
Is there a explanation how to use OpenMP with 4.2.0? My problem is, that 
icc is not compiling my cpp-programs, so I prefer to stay at gcc.
Thank you,
Stepha Ripke