[Pkg-opencl-devel] pocl

[Rebecca N. Palmer]

For x86*, we probably want to use -DKERNELLIB_HOST_CPU_VARIANTS=distro :
http://portablecl.org/docs/html/install.html#cmake-important-options-features

> arm64 still fails, now with "the clang compiler does not support
> '-march=cortex-a53'" (instead of "does not support '-march=generic'")

Looks like both of those are -mcpu names; the -march names are armv8a 
and armv8.1a:
http://sources.debian.net/src/llvm-toolchain-3.7/1:3.7.1-2/clang/test/Driver/aarch64-cpus.c/
http://sources.debian.net/src/llvm-toolchain-3.7/1:3.7.1-2/clang/lib/Driver/Tools.cpp/#L1965