$ rbenv install
Downloading ruby-2.0.0-p451.tar.gz...
-> http://dqw8nmjcqpjn7.cloudfront.net/9227787a9636551f1749ee8394b5ffe5
Installing ruby-2.0.0-p451...
BUILD FAILED
Inspect or clean up the working tree at /var/folders/bb/cg4hs1y96td08skrjw5cj8rh0000gp/T/ruby-build.20140611125242.46745
Results logged to /var/folders/bb/cg4hs1y96td08skrjw5cj8rh0000gp/T/ruby-build.20140611125242.46745.log
Last 10 log lines:
compiling ossl_x509crl.c
compiling ossl_x509ext.c
compiling ossl_x509name.c
compiling ossl_x509req.c
compiling ossl_x509revoked.c
compiling ossl_x509store.c
installing default openssl libraries
linking shared-object openssl.bundle
ld: warning: directory not found for option '~/.rbenv/versions/2.0.0-p451/lib'
make: *** [build-ext] Error 2
rbenv: version `2.0.0-p451' is not installed
これに対して
$brew uninstall readline
$brew install https://raw.githubusercontent.com/Homebrew/homebrew/0181c8a1633353affefabe257c170edbd6d7c008/Library/Formula/readline.rb
$brew pin readline
で、rbenv install出来るようになる。