Can't upgrade Rails - Failed to build gem native extension.

rubyonrails-talk
1

I am new to Rails and attempting to upgrade Rails on my Mac to latest version so that I can follow the rails tutorial, but I just can't seem to get anywhere.

When I attempt to update rails with: $ sudo gem update rails -y, I receive the following error.

ERROR: Error installing rails:       ERROR: Failed to build gem native extension.

Any ideas what I am doing wrong, or what I can do to upgrade to rails?

Ruby Version is:1.8.7, patchlevel 174 Rails current version is: 2.3.5

Many thanks in advance..

2

Quoting jay@oz <jason.morris.email@gmail.com>:

I am new to Rails and attempting to upgrade Rails on my Mac to latest version so that I can follow the rails tutorial, but I just can't seem to get anywhere.

When I attempt to update rails with: $ sudo gem update rails -y, I receive the following error.

ERROR: Error installing rails:       ERROR: Failed to build gem native extension.

Any ideas what I am doing wrong, or what I can do to upgrade to rails?

Ruby Version is:1.8.7, patchlevel 174 Rails current version is: 2.3.5

Many thanks in advance..

====

Here is the full output when running..

iMac:blog jason$ sudo gem update rails -y

Updating installed gems Updating rails Fetching: activesupport-3.1.0.gem (100%) Fetching: builder-3.0.0.gem (100%) Fetching: i18n-0.6.0.gem (100%) Fetching: bcrypt-ruby-3.0.0.gem (100%) 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

This is the key. Look for ruby.h somewhere else on your system or install a package named ruby-dev or ruby-devel. I don't know Macs, so the exact name may vary. The Ruby package includes just the ruby libraries and executables. Ruby-dev includes header files and other files needed to compile and build Ruby and Ruby native extensions.

HTH,   Jeffrey

3

Thanks Jeffrey, I tried google both ruby-dev and ruby-devel, but couldn't find anything..

I do have a file osx_ruby.h.... is this what you mean? What should I do with it?

Is it seriously this hard to upgrade rails? I've been a CF developer for years, and have been keen to give rails a try, but to be honest, this is all starting to remind me of the bad old days of .jsp..

Thanks again Jeffrey..