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Petr Hosek
85ffa199e1
LLVM triple normalization is handling "unknown" and empty components differently; for example given "x86_64-unknown-linux-gnu" and "x86_64-linux-gnu" which should be equivalent, triple normalization returns "x86_64-unknown-linux-gnu" and "x86_64--linux-gnu". autoconf's config.sub returns "x86_64-unknown-linux-gnu" for both "x86_64-linux-gnu" and "x86_64-unknown-linux-gnu". This changes the triple normalization to behave the same way, replacing empty triple components with "unknown". This addresses PR37129. Differential Revision: https://reviews.llvm.org/D50219 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@339294 91177308-0d34-0410-b5e6-96231b3b80d8
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