[boost] CUDA V9 (release candidate) breaks compilation

Subject: [boost] CUDA V9 (release candidate) breaks compilation
From: Hartmut Kaiser (hartmut.kaiser_at_[hidden])
Date: 2017-08-12 16:10:24

All,

Apparently CUDA V9 has deprecated/removed the __CUDACC_VER__ macro which is
used by Boost, see https://github.com/STEllAR-GROUP/hpx/issues/2815 for
details. Should this be fixed before the release?

Regards Hartmut
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