卜部昌平 0dea31c437 RBIMPL_ATTR_NOALIAS: not until LLVM 12 ...

I observed CI failures.
https://github.com/ruby/ruby/actions/runs/1240165911

It turns out that  RBIMPL_ATTR_NOALIAS was not mature before.  Skip
using it for old clang, and everything work as expected.

2021-09-22 16:37:13 +09:00

..

ruby

RBIMPL_ATTR_NOALIAS: not until LLVM 12

2021-09-22 16:37:13 +09:00

ruby.h

include/ruby.h: skip doxygen

2021-09-10 20:00:06 +09:00