Cool, thanks for replying. Didn't know you guys were actually running anything on Daint (I'd heard tests were planned). Your earlier comment was the first time I'd heard of the ICON model too. Quite an informative day on HN.
Well, actually it's actually mostly Jenkins that runs the code for us on Daint. ETH, which I'm also affiliated with, is starting to use the model in GPU mode for climate runs on Daint.
What are you working on at Cray?
I'm a sysadmin so I get called when things so bump in the night and maintain the running of the systems. I also get to help out with other systems in the EMEA region.
Right now, we have quite a elaborate build environment where we first load the GCC build environment to compile the C++ code base. Then we load a Fortran build environment to compile the Fortran code base. I would rather have to use one environment to work in. In the most recent Cray and PGI environments (6.0.3) I have to also add the linker path to GCC version I used for C++. This is to avoid linker issues with the C++11 abi in the newer GCC compilers (somehow, the Cray/PGI environment always wants to link with old GCC libraries). Its not a big problem with our build scripts but annoying nevertheless.