Tim Tautges <[email protected]> writes: > Lots of missing spaces for XL.
Fortunately, the LLVM backend is competitive with XL on performance and is standards-compliant. With any luck, IBM will stop shipping XL. > What about Cray, can't remember the compiler flavor they use. Cray has their own compiler, but it's not the default on any of their machines. > But anyway, surely you're not expecting your users to install their > own GCC or LLVM, right? I've seen brand-new near-petascale machines installed with 5+ year old software stacks. If the people running the facility are stuck in the stone age, then yes, users can install a contemporary compiler. Or the facility can provide a recent version. (Yes, it's a serious impediment and lack of cross-vendor ABI compatibility often means that it's not even an option. People jump through far greater hoops, so it depends whether you are targeting the average or the extreme.)
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