[Dune] how not to use -std=c++11 when compiling Dune with gccc 4.7.2 ?

[Oswald Benedikt]

Dear Dune, 

I am currently trying to solve a problem related to the usage of the boost
library in my Dune based code.

I have to use gcc 4.7.2 since I work on a Cray .

Can I tell the dune build system _not_ to enforce -std=c++11
when it compiles ?

At present, I see something like: CC -std=c++11 -DHAVE_CONFIG_H  etc.

I suspect that enforcing -std=c++11 might cause problems with
the boost library (version 1.50)

Thanks for any suggestions, Benedikt