Pre Reqs

You need XCode 3.1 or greater to install Ruby 1.9.1


Personally I’ve found using a package manager is much simpler that trying to roll you own of everything. One of the reasons this works so well for me is that I know when to give up and compile my own package. Ruby 1.9 is in MacPorts, it is stable and that is how I install on Ruby 1.9 on the vast majority of my Macs (there are 4 that I maintain btw).

  sudo port install ruby19 +mactk +c_api_docs


MacPorts has the concept of variants which are the options for your package. According to the command “port variants ruby19” there are the following availible:

  ruby19 has the variants:
      nosuffix: Don't add the 1.9 program suffix to the executables. Note: that makes the port conflict with ruby (1.8), rb-rubygems, and rb-rake ports
      c_api_docs: Generate documentation for Ruby C API
      tk: Build using MacPorts Tk
      mactk: Build using MacOS X Tk Framework
      universal: Build for multiple architectures

As you can see I like having the C API docs and using the existing MacTK framework.

By Hand

Maybe MacPorts makes you angry, you’ve had bad luck with it in the past or you just want to compile your own. This is a totally legitimate thing to want to do. It turns out its not hard either (knock on wood)

  curl -O
  tar zxfv ruby-1.9.1-p0.tar.gz
  cd ruby-1.9.1-p0
  ./configure --enable-shared --enable-pthread CFLAGS=-D_XOPEN_SOURCE=1
  sudo make install
  echo 'export PATH="/usr/local/bin:/usr/local/sbin:/usr/local/mysql/bin:$PATH"' > ~/.profile
  source ~/.profile
  ruby -v
  ruby -e "puts 'hello world'"

I did an install this way a few days ago. If you get stuck checkout this Gnu Screen log of the install, it may help you

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