Douglas Gregor 7fd0849bc3 Hash the various compiler version, target, preprocessor, and ...

header-search options into the module hash. We're just using
ADT/Hashing.hpp for this, which isn't as cryptographically strong as
I'd like, but it'll do. If someone contributes (say) and MD4
implementation, we'd happily switch to that.

llvm-svn: 167397

2012-11-05 19:45:09 +00:00

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