I recently bought a macbook pro and downloaded the Mac OS mountain lion. I was told that ruby was already pre installed and that to download rails, I would type:
$ sudo gem install rails
However, when I do this, I get this error:
Building native extensions. This could take a while...
ERROR: Error installing rails:
ERROR: Failed to build gem native extension.
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb
mkmf.rb can't find header files for ruby at /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/ruby.h
Gem files will remain installed in /Library/Ruby/Gems/1.8/gems/json-1.7.5 for inspection.
Results logged to /Library/Ruby/Gems/1.8/gems/json-1.7.5/ext/json/ext/generator/gem_make.out
I have looked around stackoverflow for answers and tried downloading Xcode version 4.4.1, except $ sudo gem install rails still doesn't work. Also, when I try the command without sudo, it tells me:
ERROR: While executing gem ... (Gem::FilePermissionError)
You don't have write permissions into the /Library/Ruby/Gems/1.8 directory.
Is there a solution to fixing this problem? Other people have mentioned something called rvm, except I don't really know what that is or how to use it.
Had a similar problem on same system as above. Xcode doesn't include the command line tools pre installed. To install these, go to preferences -> downloads section and select components, then download command line tools. This may or may not solved the above problem.
RVM allows you to switch between Ruby versions. You may not want to develop RoR apps with the default Ruby on Mountain Lion, and rather than replacing the system installed ruby, RVM allows you to use other (ie later) Ruby versions without impacting your base installed Ruby that comes with OS X.
I have previously used this as a guide when setting up Ruby On Rails under OS X:
http://pragmaticstudio.com/blog/2010/9/23/install-rails-ruby-mac
Related
When trying to install Rails from my terminal, on my Mac OS Big Sur, by typing "sudo gem install rails" I get the error message: "Failed to build native extension". I have ruby 2.6.3 installed. I tried installing Xcode as I saw that being suggested in forums, but it still doesn't work. I don't know what to do:
Here, the error in the terminal:
% sudo gem install rails
Building native extensions. This could take a while...
ERROR: Error installing rails:
ERROR: Failed to build gem native extension.
current directory: /Library/Ruby/Gems/2.6.0/gems/nio4r-2.5.8/ext/nio4r
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/bin/ruby -I /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0 -r ./siteconf20211119-69718-1dr6qis.rb extconf.rb
checking for unistd.h... *** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers. Check the mkmf.log file for more details. You may
need configuration options.
I have encountered a similar problem more than once.
I can think of three potential causes and solutions, though your problem may be rooted in something different.
1. Ruby version mismatch
You thought you were using Ruby 2.6.3. But actually the ruby your gem command recognises is a Ruby in a different version.
Check it out with ruby --version and make sure it is the right one.
If you have Rails in Ruby in a previous version, and if you have upgraded your Ruby since, then this type of error might be raised, depending on how your package management system handles the case.
If so, try uninstalling Rails first and reinstalling it.
2. Problem of installing Ruby
For some reason, the Ruby you are trying to use (2.6.3) has not been correctly installed. Then, a simple solution is to reinstall the Ruby, making sure it is correctly installed.
It highly depends which system you are using, but if you are using rbenv,
rbenv uninstall 2.6.3
rbenv install 2.6.3
rbenv rehash
should do the job. You can then reinstall your Rails.
3. Problem of permission (directory writing etc)
In your case, you run sudo gem install rails, and it probably means you have installed Ruby and Gems, including Rails, as the superuser while your Rails app directory is in a normal user.
I understand it is generally safer to install Ruby and Gems as the same user that runs Rails (mind you, though, it may not be impossible in practice in some specific environments). When the users are different, all sorts of permission problems can be encountered, and to install Rails apps are also problematic – it's possible but not straightforward in my experience.
So, my recommendation is, if ever possible and practical for you, to delete all the installed Ruby and reinstall it (=Ruby) as a normal user, who owns a Rails app directory, without using sudo. For example, if you are using rbenv, uninstall rbenv, delete all the directory related to rbenv, and reinstall rbenv from scratch as the normal user. Or, if you are using the system default Ruby, I'd recommend to install the Ruby-version management system, that is either rbenv or rvm, as the normal user, install Ruby(s) with it, and manage the installed Ruby versions with it.
If neither is possible or practical, check out the directory permission where Gems are installed and make sure they are consistent with what you would expect. Personally, I would make all the efforts to use a Ruby-version management system whenever I use Rails.
I am trying to install rails on my mac, but every time I type sudo gem install rails into the command line, I get the following error message. I have been stuck for a while, hope you can help.
Building native extensions. This could take a while...
ERROR: Error installing rails:
ERROR: Failed to build gem native extension.
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/bin/ruby extconf.rb
mkmf.rb can't find header files for ruby at /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/include/ruby.h
Gem files will remain installed in /Library/Ruby/Gems/2.0.0/gems/atomic-1.1.14 for inspection
Results logged to /Library/Ruby/Gems/2.0.0/gems/atomic-1.1.14/ext/gem_make.out
If you are trying to install Rails 4.0, it needs RubyGems 2.0.3, so you have to update your system by using following command
gem update --system 2.0.3
and then continue with your installation.
Hope it helped
I would just use rvm. It should work like a charm. Or you could dig around and see if you can find that ruby.h file its talking about. But I personally think the latter would be a pain in the ass.
Upgrade xcode by typing following command in terminal window-
xcode-select --install
This should solve your isssu.
yea the rvm works like a charm and it will come in handy when you want to switch between different rails versions
I had the same issues. I upgraded my version (using RVM) of Ruby from 2.0.0-p195 to 2.0.0-p353 (make sure you tell RVM to use the new version as the default). After this I did gem install rails again and it worked fine.
Make sure you have installed the right version of DevKit, you can get it from here...
http://rubyinstaller.org/downloads/
and install as it says here:
https://github.com/oneclick/rubyinstaller/wiki/Development-Kit#installation-instructions
if you still have the problem even after Upgrading Xcode.
Its may be because :
The Apple LLVM compiler in Xcode 5.1 treats unrecognized command-line options as errors. This issue has been seen when building both Python native extensions and Ruby Gems, where some invalid compiler options are currently specified.
To workaround this issue, set the ARCHFLAGS environment variable to downgrade the error to a warning.
ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future gem install GemName
Personally I have got this problem while installing json gem , I did :
ARCHFLAGS=-Wno-error=unused-command-line-argument-hard-error-in-future gem install json
And the problem was solved.
I seem to have a conflict when trying to install Rails on Mountain Lion. I have tried updating Ruby but this did not help. I also tried Rails Installer but that also gave an error. Ruby version is 1.8.7
Here is the error I am getting from terminal
sudo gem install rails
Building native extensions. This could take a while...
ERROR: Error installing rails:
ERROR: Failed to build gem native extension.
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb
mkmf.rb can't find header files for ruby at /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/ruby.h
Gem files will remain installed in /Library/Ruby/Gems/1.8/gems/atomic-1.1.10 for inspection.
Results logged to /Library/Ruby/Gems/1.8/gems/atomic-1.1.10/ext/gem_make.out
I was having the same issues and I had all the requirements. My solution? Upgraded (through RVM) my version of Ruby from 2.0.0-p195 to 2.0.0-p353. After this I tried gem install rails and it worked like it was supposed to.
I installed the x-code command line tools and then the rails install worked correctly.
Use RailsInstaller and these step-by-step instructions:
I found the answer here, http://net.tutsplus.com/tutorials/ruby/how-to-install-ruby-on-a-mac/
Although by no means was this a walk in the park, due to version conflicts, the tut is over a year old and Rails now requires at least Ruby 1.9.3 and you need to install Command Line tools in Xcode. This tut uses RVM.
I tried Rails Installer which sounds a lot easier than doing it this way but that also gave me an error. I think I had major version conflicts going on. If you are trying to install Rails then I'd try Rails Installer first. Here's a very recent tut on installing it, http://pragmaticstudio.com/blog/2010/9/23/install-rails-ruby-mac
(side note: my mac crashed a couple of weeks ago due to some os problem; the apple people at the store took care of it, and it's back to "normal" - just stating this in case it's related to the current problem)
today, i decided to practice some ruby after having not done it in a while (following hartl's tutorial)
when trying to generate a new application, after a pause and seemingly normal files, it comes up with this: (for the record - when I created my previous directories - I never had a problem with it until today)
Installing json (1.7.5) with native extensions
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
/Users/name_withheld/.rvm/rubies/ruby-1.9.3-p0/bin/ruby extconf.rb
creating Makefile
make
sh: make: command not found
Gem files will remain installed in /Users/name_withheld/.rvm/gems/ruby-1.9.3-p0/gems/json-1.7.5 for inspection.
Results logged to /Users/name_withheld/.rvm/gems/ruby-1.9.3-p0/gems/json-1.7.5/ext/json/ext/generator /gem_make.out
An error occured while installing json (1.7.5), and Bundler cannot continue.
Make sure that `gem install json -v '1.7.5'` succeeds before bundling.
Tried to install json. This is what it comes up with:
Building native extensions. This could take a while...
ERROR: Error installing json:
ERROR: Failed to build gem native extension.
/Users/name_withheld/.rvm/rubies/ruby-1.9.3-p0/bin/ruby extconf.rb
creating Makefile
make
sh: make: command not found
Gem files will remain installed in /Users/name_withheld/.rvm/gems/ruby-1.9.3-p0/gems/json-1.7.5 for inspection.
Results logged to /Users/name_withheld/.rvm/gems/ruby-1.9.3-p0/gems/json-1.7.5/ext/json/ext/generator /gem_make.out
Anyway, it seems the problem may be related to gcc? or xcode?
I'm confused, and I never had a problem until today! Hence why I think it may be do something with the reset that the people at apple store may have done, maybe?
For the record, when I try to download command line for xcode which everyone says it's free, it's not. You have to register and pay some sort of licensing fee.
Help? Can anyone sort out my confusion on what I should do here?
Edit
Am on 10.6.8 version (ie Snow Leopard?)
Edit 2
Have added this to comments beneath, but also adding it here for further trouble-shooting if it helps.
This is what my path shows:
"/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/X11/bin:/Users/name_withheld/.rvm/bin"
You should also make sure you have Rails 3.x (ideally at least 3.2.y)... You can check which Rails you are running by doing:
$ rails -v
Use:
$ gem install rails
to get the latest version of Rails. Once you do a 'rails -v' and know you're running Rails 3, then a 'rails new foo' should create an app (and directory) called foo.
Also, Mischa had a typo, the command is:
$ gem update rails # *Not* gem rails update ...
I would also run the following to 'start over' with rvm:
$ rvm implode
Then reinstall rvm, per the instructions here.
You may also find this much easier: http://railsinstaller.org/#osx
Btw, homebrew and rvm are two totally separate things. brew is used to download, build (compile), and install packages using a local (on your Mac) compiler (gcc or CLI tools, put there via Xcode or the Kenneth Reitz gcc installer). rvm is Ruby Version Manager, it's only used to manage the different Ruby versions you might install. To use it, you just say 'rvm 1.9.3' (assuming you've installed Ruby 1.9.3 already) to make sure you're using that version of ruby.
Similar to Rails, you can check which version of Ruby you're using by doing:
$ ruby -v
Also, rvm will tell you which one you're using (if it says 'system' then try the 'rvm 1.9.3' or 'rvm 1.9.2' command to change the one you're using):
$ rvm list
The one in use will have a '=*' or '=>' next to the one you're using (if you have a fairly recent version of rvm installed).
Good luck--let me know if any of this helps.
was hoping someone could point me in the right direction as I am unable to find a previously posted answer to my question of trying to install rails on my mac mini running Lion OSX 10.7.3. I have ruby version 1.8.7 and rvm 1.12.5 but when I come to install rails using sudo gem install rails I get the following:
Building native extensions. This could take a while...
ERROR: Error installing rails:
ERROR: Failed to build gem native extension.
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb
mkmf.rb can't find header files for ruby at /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/ruby.h
Gem files will remain installed in /Library/Ruby/Gems/1.8/gems/json-1.7.0 for inspection.
Results logged to /Library/Ruby/Gems/1.8/gems/json-1.7.0/ext/json/ext/parser/gem_make.out
The content of gem_make.out are:
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby extconf.rb
mkmf.rb can't find header files for ruby at /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/ruby.h
which did not really help me so not sure what it is I am missing? Any help or directions to help me solve this problem would be appreciated. Many thanks.
rvm is not intended to be used with sudo except during a multi-user installation - try simply gem install rails. Even better, rvm now has a guided rails install,
curl -L get.rvm.io | bash -s stable --rails
Take a look at RVM installation page for more details. If you're still having trouble, post the commands you're trying. The #rvm channel on irc.freenode.net is very helpful too.
In order to build Ruby and many other gems you'll need a working compiler. Unfortunately Apple has made this quite complex so there's a command in rvm to help: rvm requirements
you should not use sudo gem ... it basically looses your environment settings and prevents you from using RVM.
Please follow #tantrix instructions.
Sounds like you'll need to install XCode on your machine to get the necessary header files for building the Rails gem. It's a huge installation, unfortunately.
There was, at one point, a way to load (e.g.) the stuff on your machine that you need to build Rails without installing XCode, but I can't seem to locate it at the moment.
In my case,
I run rvm requirements and it helps me install gcc.
But the problem still exists and only solved after I restarted osx.