问题
Hey I am new to rails (as well as linux) and I keep getting this error:
Installing json (1.7.5) with native extensions
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
/usr/bin/ruby1.9.1 extconf.rb
/usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot load such file -- mkmf (LoadError)
from /usr/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from extconf.rb:1:in `<main>'
Gem files will remain installed in /home/jack/.bundler/tmp/10426/gems/json-1.7.5 for inspection.
Results logged to /home/jack/.bundler/tmp/10426/gems/json-1.7.5/ext/json/ext/generator/gem_make.out
An error occurred while installing json (1.7.5), and Bundler cannot continue.
Make sure that `gem install json -v '1.7.5'` succeeds before bundling.
jack@jack-ThinkCentre:~/rails_projects/sample_app$
I cant install the gem individually or with bundle install. I used rvm to install rails. thanks in advance.
回答1:
Installing the ruby1.9.1-dev package should fix this for you
sudo apt-get install ruby1.9.1-dev
回答2:
"The same issue on ubuntu-trusty-64 running ruby 2.2.3. the solution is to install libgmp3-dev."
sudo apt-get install libgmp3-dev
来源：https://stackoverflow.com/questions/13652788/ruby-on-rails-installing-json-ubuntu-error