Geoffrey Malcolm Oxberry 163fc4cd18 apple-libunwind: new package, provides unwind ... This commit continues the changes discussed in #8823 by creating a new "apple-libunwind" placeholder package that supplies instructions for how to configure packages.yaml to register Apple's libunwind implementation with spack. This package also provides the "unwind" virtual package representing the libunwind base API. The clang-apple compiler version should be specified in packages.yaml so that apple-unwind is only used with Apple's clang compiler, not the stock LLVM compiler.		2018-08-06 22:01:50 -07:00
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spack	apple-libunwind: new package, provides unwind	2018-08-06 22:01:50 -07:00