рубин на рельсах ошибки для баз данных

Question

Я новичок в RoR , когда я пытаюсь связать установки ниже ошибки показывает , когда я использую mysql2 вместо sqllite же ошибки

я использую Linux хостинг и сайт показывает внутренний сервер ошибка согласно моему мало знаний сервер использует phussion пассажира

Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension. 

     /opt/ruby/bin/ruby extconf.rb 
checking for sqlite3.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. 

Provided configuration options: 
     --with-opt-dir 
     --without-opt-dir 
     --with-opt-include 
     --without-opt-include=${opt-dir}/include 
     --with-opt-lib 
     --without-opt-lib=${opt-dir}/lib 
     --with-make-prog 
     --without-make-prog 
     --srcdir=. 
     --curdir 
     --ruby=/opt/ruby/bin/ruby 
     --with-sqlite3-dir 
     --without-sqlite3-dir 
     --with-sqlite3-include 
     --without-sqlite3-include=${sqlite3-dir}/include 
     --with-sqlite3-lib 
     --without-sqlite3-lib=${sqlite3-dir}/lib 
/opt/ruby/lib/ruby/1.9.1/mkmf.rb:381:in `try_do': The compiler failed to generate an executable file. (RuntimeError) 
You have to install development tools first. 
     from /opt/ruby/lib/ruby/1.9.1/mkmf.rb:506:in `try_cpp' 
     from /opt/ruby/lib/ruby/1.9.1/mkmf.rb:970:in `block in find_header' 
     from /opt/ruby/lib/ruby/1.9.1/mkmf.rb:790:in `block in checking_for' 
     from /opt/ruby/lib/ruby/1.9.1/mkmf.rb:284:in `block (2 levels) in postpone' 
     from /opt/ruby/lib/ruby/1.9.1/mkmf.rb:254:in `open' 
     from /opt/ruby/lib/ruby/1.9.1/mkmf.rb:284:in `block in postpone' 
     from /opt/ruby/lib/ruby/1.9.1/mkmf.rb:254:in `open' 
     from /opt/ruby/lib/ruby/1.9.1/mkmf.rb:280:in `postpone' 
     from /opt/ruby/lib/ruby/1.9.1/mkmf.rb:789:in `checking_for' 
     from /opt/ruby/lib/ruby/1.9.1/mkmf.rb:969:in `find_header' 
     from extconf.rb:30:in `<main>' 


Gem files will remain installed in /home/jformmp7/ruby/gems/gems/sqlite3-1.3.10 for inspection. 
Results logged to /home/jformmp7/ruby/gems/gems/sqlite3-1.3.10/ext/sqlite3/gem_make.out 
An error occurred while installing sqlite3 (1.3.10), and Bundler cannot 
continue. 
Make sure that `gem install sqlite3 -v '1.3.10'` succeeds before bundling. 

содержимое Gemfile

су RCE 'https://rubygems.org'

# Bundle edge Rails instead: gem 'rails', github: 'rails/rails' 
gem 'rails', '4.1.6' 
# Use sqlite3 as the database for Active Record 
#gem 'sqlite3' 
# Use SCSS for stylesheets 
gem 'sass-rails', '~> 4.0.3' 
# Use Uglifier as compressor for JavaScript assets 
gem 'uglifier', '>= 1.3.0' 
# Use CoffeeScript for .js.coffee assets and views 
gem 'coffee-rails', '~> 4.0.0' 
# See https://github.com/sstephenson/execjs#readme for more supported runtimes 
gem 'therubyracer', platforms: :ruby 
#gem "therubyracer" 
# Use jquery as the JavaScript library 
gem 'jquery-rails' 
# Turbolinks makes following links in your web application faster. Read more: https://github.com/rails/turbolinks 
gem 'turbolinks' 
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder 
gem 'jbuilder', '~> 2.0' 
# bundle exec rake doc:rails generates the API under doc/api. 
gem 'sdoc', '~> 0.4.0',   group: :doc 

# Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring 
gem 'spring',  group: :development 

# Use ActiveModel has_secure_password 
# gem 'bcrypt', '~> 3.1.7' 

# Use unicorn as the app server 
# gem 'unicorn' 

# Use Capistrano for deployment 
# gem 'capistrano-rails', group: :development 

# Use debugger 
# gem 'debugger', group: [:development, :test] 

#gem 'mysql2' 

Answer 1

Я думаю, вы на Ubuntu?

Случалось, что в прошлом, надеюсь, оно будет разрешено путем ввода.

sudo apt-get install sqlite3 libsqlite3-dev 
bundle install