require no such file to load -- mkmf LoadError

Question

I was trying to install rails on Ubuntu Natty Narwhal 11 04  using ruby1 9 1   I installed ruby using apt-get install ruby1 9 1-full which contains the dev package  I googled the error and all have suggested I install the 1 9 1-dev which I already have   Building native extensions   This could take a while    ERROR   Error installing rails      ERROR  Failed to build gem native extension            usr bin ruby1 8 extconf rb extconf rb 36 in  require   no such file to load -- mkmf  LoadError      from extconf rb 36   Gem files will remain installed in  usr lib ruby gems 1 8 gems bcrypt-ruby-3 0 1 for inspection  Results logged to  usr lib ruby gems 1 8 gems bcrypt-ruby-3 0 1 ext mri gem make out

User · Answer

Have you tried   sudo apt-get install ruby1 8-dev

User · Answer

Ruby version  2 7 1 gem version  3 1 3  You need to check the extension that could not be installed  and find the reasons   Read the mkmf log file showed at the installation error under  To see why this extension failed to compile  please check the mkmf log which can be found here    perhaps there is a missing lib   sometimes iconv    and you must install it   You can search the extension with your package manager apt  yum  pacman     too    Personal case  Arch Linux- nokogiri  gem install rails   Showed me      To see why this extension failed to compile  please check the mkmf log   which can be found here     home user  gem ruby 2 7 0 extensions x86 64-linux 2 7 0 nokogiri-1 10 9 mkmf log   Go to  https   aur archlinux org packages ruby-nokogiri    Make sure you have all dependencies installed Make sure you have make installed git clone the package cd to package makepkg the package   Hope to help

User · Answer

I think is a little late but   sudo yum install -y gcc ruby-devel libxml2 libxml2-devel libxslt libxslt-devel   worked for me on fedora   http   nokogiri org tutorials installing nokogiri html

User · Answer

The problem is still is recursive on Ubuntu 13 04 13 10 14 04   and   sudo apt-get install ruby1 9 1-dev   worked out for me okay   So If you are using Ubuntu 13 04 13 10 14 04 then using this will really come in handy    This works even if ruby version is 1 9 3  This is because there is no ruby1 9 3-dev available in the Repository

User · Answer

This is the answer that worked for me   Was in the comments above  but deserves its rightful place as answer for ubuntu 12 04 ruby 1 8 7  sudo apt-get install ruby-dev   if above doesnt work make sure you have build essential sudo apt-get install build-essential

User · Answer

After some search for a solution it turns out the -dev package is needed  not just ruby1 8  So if you have ruby1 9 1 doing  sudo apt-get install ruby1 9 1-dev   or to install generic ruby version  use  as per  lamplightdev comment    sudo apt-get install ruby-dev   should fix it   Try locate mkmf to see if the file is actually there

User · Answer

I got the similar error when install bundle  sudo apt-get install ruby-dev   Works great for me and solve the problem Mint 16 ruby1 9 3

User · Answer

I also needed build-essential installed   sudo apt-get install build-essential

User · Answer

You ve Ruby 1 8 so you need to upgrade to at least 1 9 to make it working   If so  then check How to install a specific version of a ruby gem   If this won t help  then reinstalling ruby-dev again

User · Answer

You can use RVM Ruby version manager  which helps in managing all versions of ruby on your machine   which is very helpful for you development  when migrating to unstable release to stable release    or for Linux  ubuntu  go for sudo apt-get install ruby1 8-dev  then sudo gem install rails to verify it do  rails -v it will show version on rails  after that you can install bundles  required gems for development

[ruby-on-rails] `require': no such file to load -- mkmf (LoadError)

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