bumptech/stud — pull request #105 by vincentbernat (2012-06-24 10:57:55+00:00)
Title: cache: use optimized futexes on i386 and amd64 arch only

Optimized futexes are only available on i386 and amd64 since they use
inline assembly. It is difficult to come with a generic way to tell
which arch we are using from the Makefile and therefore, additional
checks are put in the preprocessor before using those futexes.