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Brian Ryckbost

Install Ruby 1.9.3 with libyaml on CentOS

By Brian Ryckbost on October 31, 2011 in how-to, install, libyaml, ruby, and yaml

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.

Installing libyaml

$ 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-devel and 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™.


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By Brian Ryckbost on October 31, 2011 in how-to, install, libyaml, ruby, and yaml

46 Comments

  1. shapeshed

    shapeshed October 31, 2011 http://shapeshed.com

    If you don’t want to compile manually rbenv (with ruby-build) takes care of installing libyaml for you too

  2. Haris Amin

    Haris Amin October 31, 2011 http://blog.harisamin.com

    just a quick note, rvm will install libyaml for you too :)

  3. Brian Ryckbost

    Brian Ryckbost October 31, 2011 http://collectiveidea.com

    Haris Amin</strong> &amp; <strong>shapeshed: Great points! I should have pointed out this was for a server which isn’t using rvm or rbenv.

  4. Millisami

    Millisami November 01, 2011 http://nepalonrails.tumblr.com

    Yup, rvm 1.9.2 installs it https://gist.github.com/1329273#gistcomment-60100

  5. Vít Ondruch

    Vít Ondruch November 01, 2011

    You should be able to get installed libyaml from EPEL packages 1. Also, you should be able to build RPM packages for R1.9.3 from my spec file 2.

    1 https://admin.fedoraproject.org/pkgdb/acls/name/libyaml
    2 https://github.com/voxik/ruby.spec

  6. Tom

    Tom November 01, 2011 http://none

    I get error running ‘make’ and error running ‘make install’ when I use rvm install 1.9.3

    I cannot read the log since I do not understand it, but it is a log tied to the yaml-0.1.4 folder.

    I would like to use RVM since I want to make gemsets and being a newbie it gives me some security …lol

    Any suggestions on how I can let RVM know that ruby 1.9.3 is installed if I install from source using the above.

    Thanks,

    Tom.

  7. Brian Ryckbost

    Brian Ryckbost November 02, 2011 http://ryckbost.com

    @Tom: If you’re using RVM you won’t need to install libyaml from source. RVM will take care of that for you.

    To install Ruby 1.9.3-p0 via RVM run rvm install 1.9.3-p0

  8. Tom

    Tom November 02, 2011

    Hi Brian,

    Thanks for your reply to my earlier posting with respect to RVM install 1.93 and the subsequent errors as it tried to install yaml.

    That was the problem …. RVM tried to install Yaml 0.1.4 and in the process it gave me two warnings, one after the other and subsequently it did not install Ruby 1.9.3 even though it indicated that the installation was complete.

    The two warnings were, first “error running ‘make’” and the second was “error running ‘make install’”

    Maybe it is something about my setup …. I have just downloaded Ubuntu 11.10 for windows and I installed GIT and then RVM and they both worked just fine then I thought I would use RVM to install Ruby 1.9.3.

    I removed Ubuntu and now I am about to start all over … any other thoughts on this …. I know each installation is so different … but maybe you see a work around.

    Thanks again,

    Tom.

  9. Tom

    Tom November 02, 2011

    Hi Brian,

    Thanks for your reply to my earlier posting with respect to RVM install 1.93 and the subsequent errors as it tried to install yaml.

    That was the problem …. RVM tried to install Yaml 0.1.4 and in the process it gave me two warnings, one after the other and subsequently it did not install Ruby 1.9.3 even though it indicated that the installation was complete.

    The two warnings were, first “error running ‘make’” and the second was “error running ‘make install’”

    Maybe it is something about my setup …. I have just downloaded Ubuntu 11.10 for windows and I installed GIT and then RVM and they both worked just fine then I thought I would use RVM to install Ruby 1.9.3.

    I removed Ubuntu and now I am about to start all over … any other thoughts on this …. I know each installation is so different … but maybe you see a work around.

    Thanks again,

    Tom.

  10. Tom

    Tom November 02, 2011

    Hey Brian,
    I found a temporary work-around, that is for some folks it worked, unfortunately for me it did not.

    But if you are interested here is the link:
    https://github.com/wayneeseguin/rvm/issues/553

    Thanks,
    Tom.

  11. Tom

    Tom November 02, 2011

    Hey Brian,
    I found a temporary work-around, that is for some folks it worked, unfortunately for me it did not.

    But if you are interested here is the link:
    https://github.com/wayneeseguin/rvm/issues/553

    Thanks,
    Tom.

  12. djr

    djr November 08, 2011

    Great – thanks the libyaml build install worked for me – and fixed the same problem you described with the 1.9.3 install.

  13. invellsaima

    invellsaima November 09, 2011 http://twitter.com

    Hi! i’m repost you post: to my @urciibqo twitter

  14. Gerald Forster

    Gerald Forster November 14, 2011 http://derkalender.at

    For Debian Lenny, first add to /etc/sudoers:
    your_user ALL=NOPASSWD:/usr/bin/make

    Thany you! Gerald

  15. Gerald Forster

    Gerald Forster November 15, 2011 http://derkalender.at

    Correction.
    Sorry – it should bei Debian 6 – Squeeze.

    Best regards
    Gerald

  16. Christian Murphy

    Christian Murphy November 18, 2011

    Thanks for the useful tip.  I found that instead of
        —with-opt-dir=/usr/local/lib
    I need to run ./configure with
        —with-opt-dir=/usr/local
    (without the lib).  Otherwise, strace shows the loader trying to load the libyaml library from /usr/local/lib/lib.

  17. steve

    steve November 24, 2011

    thanks for your article this helpfull with me

    best regards

  18. Tyson Cung

    Tyson Cung January 24, 2012 http://thejupitech.com

    Why 1.9.3 is not yet recognize by rvm. Any ideas?

  19. Harsha

    Harsha January 27, 2012 http://sriharsha.net

    Thank you. After wasting time with apt yaml, I got here. Installing from source works great. Thanks.

  20. Rooby G

    Rooby G January 31, 2012 http://kiranatama.com

    Great tutorial, after a DAY trying to figure out how to install Ruby via other tutorials, this one was straight forward and easy to follow… you’re a life saver!!! TY!!! By the way could you also post a video for this?

  21. Philip Sampaio

    Philip Sampaio February 24, 2012 http://www.philipsampaio.com.br

    I have installed libyaml and libyaml-devel from yum(EPEL on CentOS 5) and I run:

    ./configure —with-opt-dir=/usr/include/

    Them, make and make install.
    It works!

    Thanks!

  22. David

    David March 14, 2012

    I was hitting my head against the wall until I tried Ruby 1.9.3-p0 not the latest Ruby 1.9.3-p125.

    Thanks!

  23. Seth A. Roby

    Seth A. Roby May 07, 2012

    I got this working by changing the ruby configure line to:

        ./configure —prefix=/usr/local —enable-shared —disable-install-doc —with-opt-dir=/usr/local

    This picks up the library and the include file itself, which is apparently important, now.

  24. Alex Stoneham

    Alex Stoneham May 19, 2012 http://developmentlabs.com

    Thanks dude

  25. Torey Heinz

    Torey Heinz May 22, 2012 http://ihswebdesign.com

    Thanks Ryan, this worked great for me.

  26. jaffer

    jaffer May 30, 2012

    Thanks bro ..! it works

  27. Forrest

    Forrest May 30, 2012

    Followed it to a T, no errors, but when I check version it’s still at 1.8.5. :/

  28. John DiStasio

    John DiStasio June 10, 2012 http://jndistasio.wordpress.com

    Hello

    I had the same problem on openSUSE. After some searching, I found a blog post (http://blog.sethladd.com/2007/03/installing-openssl-support-for-ruby-on.html) that pointed me in the right direction. By following those instructions, I was able to install psych (and other stuff) with the libyaml available through my package manager.

    I don’t know how/if the openSUSE packaged version differs from CentOS and whether or not this would work for other uses, but hopefully it helps someone!

  29. Bryan

    Bryan July 12, 2012

    Forrest, hopefully you solved this, but your PATH probably has /usr/bin ahead of /usr/local/bin, which is where these directions put the updated ruby. That’s what happened to me at least.

  30. David

    David July 17, 2012

    Thanks! This worked beautifully for me.

  31. Peter

    Peter July 22, 2012

    how can i test if the libyaml is installed correctly?

    i have problems with the installation of libyaml and i think that it is the problem causes problems in my cpanel ( i can’t install ruby aplications with this error: "An unknown error was encountered when creating your rails application. ").

  32. laito

    laito July 25, 2012

    Thanks . I got it at the version of ruby 1.93p134 on CentOS5.8

  33. Richard

    Richard September 29, 2012 http://www.richierutter.com/

    Brian, you have no idea how much time (and money) you have just saved me.

    I was about to give up and outsource the install, usually I am able to do this sort of thing myself, however after 3 hours of trying to figure out the Linux commands, I was ready to throw in the towel.Then, I stumbled upon this article. Thanks very much!

  34. oscar

    oscar October 15, 2012 http://instropy.com

    I´ve tried to complete the requierements of yeoman for almost 4 hours, most of the time was gone trying to successfully upgrade ruby. Thanks.

  35. Carey Hinoki

    Carey Hinoki October 15, 2012

    https://github.com/sstephenson/ruby-build/issues/119 check it out it worked for me and my comments are below – on Centos 6.3

  36. Ben

    Ben October 22, 2012 http://doginthehat.com.au

    Thanks, worked a treat!

  37. Do

    Do October 25, 2012

    thank you, man, it helped!

  38. Anton

    Anton December 15, 2012 http://www.bergaul.com

    I was looking around on google, but could not find any satisfy answer, but your tips works great !!
    Thanks :)

  39. cbankester

    cbankester December 19, 2012

    Hey, I made a gist out of this for anyone to use. Check it out here:
    https://gist.github.com/4337899

    I updated the ruby version to the latest, ruby 1.9.3-p327. Now you can just run: ‘curl -L https://gist.github.com/raw/4337899/82702babb65ab72b6b8dec63b5346ca3c6f32e65/ruby_1.9.3-p327_install.sh | bash’ and it’ll just work.
    ;)

  40. Trevor Lee

    Trevor Lee February 14, 2013 http://trevorlee.net/

    Thank you for your help with this…

    I also had to leave off /lib from —with-opt-dir=$HOME

  41. Eduardo Sanchez

    Eduardo Sanchez February 26, 2013

    This worked great a couple of months ago.  Now, since I have 1.9.3-p0 installed: how do I update the ruby to 1.9.3-p392 ? Do I just follow the same ruby install steps above but replace with the p392 url?  Will it overwrite the p0 ruby or do I have to uninstall p0 first and then install p392? Do I have to reinstall all gems again?  Thanks.

  42. Olivier Stas

    Olivier Stas March 07, 2013

    Thanks for sharing, as adding libyaml via apitude on Ubuntu didn’t worked for me

  43. Lucca Mordente

    Lucca Mordente April 06, 2013

    Thanks a lot!!

  44. Frederick Polgardy

    Frederick Polgardy May 08, 2013

    If you installed libyaml and libyaml-dev via yum, you need —with-opt-dir=/usr.

  45. mpc755

    mpc755 October 01, 2013

    Best post on the subject of libyml and ruby

  46. lathika

    lathika February 21, 2014

    Hi Brian ,

    I followed these steps for installing ruby , i have exported the values export CPPFLAGS=-I/scratch/gitlab/shared/include and export LDFLAGS=-L/scratch/gitlab/shared/lib
    But still i get this error when i run gem install bundler

    /scratch/gitlab/ruby/lib/ruby/1.9.1/yaml.rb:56:in `’:
    It seems your ruby installation is missing psych (for YAML output).
    To eliminate this warning, please install libyaml and reinstall your ruby.

    $ 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=/scratch/gitlab/ruby —enable-shared —disable-install-doc —with-opt-dir=/scratch/gitlab/ruby/lib
    $ make
    $ make install

    $ 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=/scratch/gitlab/shared
    $ make
    $ make install
    Please suggest what needs to be done for installing ruby

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