Issue #7817 has been updated by ko1 (Koichi Sasada). Assignee set to mame (Yusuke Endoh) Priority changed from Normal to High ---------------------------------------- Bug #7817: (Unable to compile Ruby 2.0.0-rc2 on OSX (clang version 2.1) https://bugs.ruby-lang.org/issues/7817#change-36358 Author: injekt (Lee Jarvis) Status: Feedback Priority: High Assignee: mame (Yusuke Endoh) Category: build Target version: 2.0.0 ruby -v: 2.0.0-rc2 clang -v returns Apple clang version 2.1 (tags/Apple/clang-163.7.1) (based on LLVM 3.0svn) Target: x86_64-apple-darwin12.2.0 Thread model: posix Here's the make output: https://gist.github.com/injekt/4e26a6dee2ce42fc463d The same version compiles fine with gcc on the same system, and reportedly compiles without issues on more recent versions of clang -- http://bugs.ruby-lang.org/