Ruby 2.1.1 fails to build on PowerPC darwin, due to __builtin_unreachable
Ruby 2.1.1 (and possibly a few older versions) fails to build on PowerPC Darwin using Apple-provided GCCs. When linking miniruby, the build fails due to:
/usr/libexec/gcc/powerpc-apple-darwin8/4.2.1/ld: Undefined symbols: ___builtin_unreachable
This occurs with Apple GCC 4.0 and 4.2, on Mac OS X 10.4 and 10.5 PowerPC. The issue does not occur using newer FSF GCCs (for instance, 4.8.2) on the same OS X versions. While I'm unable to test on 10.5 Intel, I can confirm that newer Intel OS X versions work fine using Apple GCC 4.2.
Verbose build logs, from Mac OS X 10.4 with Apple GCC 4.2, are attached.
While I suspect this was possibly introduced by r34784, as removing the check from configure allows the build to succeed, that revision is 2 years old and I only noticed these build failures beginning relatively recently.
Updated by nobu (Nobuyoshi Nakada) about 6 years ago
- Status changed from Open to Closed
- % Done changed from 0 to 100
Applied in changeset r45716.
rb_cv_func___builtin_unreachable): try with an external variable not only by a warning, which might not be shown due to the optimization. [ruby-core:61647] [Bug #9665]