Install Ruby 1.9.3 with libyaml on CentOS
Ruby 1.9.3-p0 makes psych—the replacement for 1.8.7’s YAML library, Syck—the default YAML parser. Psych is a wrapper around libyaml, so you’re going to need it installed and configured before installing Ruby.
If you install 1.9.3-p0 without libyaml, you’ll see warnings like this:
It seems your ruby installation is missing psych (for YAML output). To eliminate this warning, please install libyaml and reinstall your ruby.
$ wget http://pyyaml.org/download/libyaml/yaml-0.1.4.tar.gz $ tar xzvf yaml-0.1.4.tar.gz $ cd yaml-0.1.4 $ ./configure --prefix=/usr/local $ make $ make install
Quick review of what’s going on: download and untar the source code, change to the directory and install the package. You may need to sudo the
make install command. Your mileage may vary.
Installing Ruby 1.9.3-p0
$ wget http://ftp.ruby-lang.org/pub/ruby/1.9/ruby-1.9.3-p0.tar.gz $ tar xzvf ruby-1.9.3-p0.tar.gz $ cd ruby-1.9.3-p0 $ ./configure --prefix=/usr/local --enable-shared --disable-install-doc --with-opt-dir=/usr/local/lib $ make $ make install
After installing, you can verify that Ruby was installed with
ruby -v. It’s also worth trying
gem --version to make sure you don’t get any errors regarding psych.
I tried installing
libyaml from Yum, but couldn’t get ruby installed and recognizing those packages. Out of frustration, I turned to installing libyaml by source and it Just Worked™.