Why do I get a bcrypt-ruby gem install error?

Question

Getting an error when trying to install the gem devise, the installation is stopping on the gem bcrypt-ruby:

$ gem install bcrypt-ruby
Error installing bcry         


        

Answer 1

It requires to install ruby-dev before installing bcrypt-ruby. If you are using Ubuntu, run

sudo apt-get install ruby1.9.1-dev

or

sudo apt-get install ruby1.8-dev

based on RUby version.

Answer 2

If you are using version 1.8 the required packages for bcrypt are in the dev bundle. Try using

$sudo apt-get install ruby1.8-dev

then

$gem install bcrypt-ruby 

Answer 3

Looks like there might be some info missing here - for me, this was due to a brew install of gcc. gcc was in /usr/bin, but not gcc-4.2. So I just did the following:

$ cd /usr/bin
$ sudo ln -s gcc gcc-4.2

which creates a link, gcc-4.2, which the gem is looking for that goes back to gcc.

Hope that helps.

Answer 4

sudo apt-get install ruby1.9.1-dev

whoked charm for me! Thanks a lot

Answer 5

This fix work for me on ubuntu on osx use homebrew, macports whatever:

sudo apt-get install ruby1.9.1-dev

Answer 6

Well, it works with Ruby 1.9.2 under RVM on MacOS 10.6.7:

$ ruby -v
ruby 1.9.2p180 (2011-02-18 revision 30909) [x86_64-darwin10.6.0]

$ gem install bcrypt-ruby
Fetching: bcrypt-ruby-2.1.4.gem (100%)
Building native extensions.  This could take a while...
Successfully installed bcrypt-ruby-2.1.4
1 gem installed
Installing ri documentation for bcrypt-ruby-2.1.4...
Installing RDoc documentation for bcrypt-ruby-2.1.4...

Try rvm notes and see if it says you need to install anything.