您好，我正在努力将我的网站放到 digital ocean 中。但是在我安装 Bundle 的过程中，我得到了这个错误
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
/usr/local/rvm/rubies/ruby-2.2.4/bin/ruby -r ./siteconf20161001-6508-ukh5t9.rb extconf.rb --with-cflags=-std=c99
checking for unistd.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=/usr/local/rvm/rubies/ruby-2.2.4/bin/$(RUBY_BASE_NAME)
/usr/local/rvm/rubies/ruby-2.2.4/lib/ruby/2.2.0/mkmf.rb:456:in `try_do': The compiler failed to generate an executable file. (RuntimeError)
You have to install development tools first.
from /usr/local/rvm/rubies/ruby-2.2.4/lib/ruby/2.2.0/mkmf.rb:587:in `try_cpp'
from /usr/local/rvm/rubies/ruby-2.2.4/lib/ruby/2.2.0/mkmf.rb:1060:in `block in have_header'
from /usr/local/rvm/rubies/ruby-2.2.4/lib/ruby/2.2.0/mkmf.rb:911:in `block in checking_for'
from /usr/local/rvm/rubies/ruby-2.2.4/lib/ruby/2.2.0/mkmf.rb:351:in `block (2 levels) in postpone'
from /usr/local/rvm/rubies/ruby-2.2.4/lib/ruby/2.2.0/mkmf.rb:321:in `open'
from /usr/local/rvm/rubies/ruby-2.2.4/lib/ruby/2.2.0/mkmf.rb:351:in `block in postpone'
from /usr/local/rvm/rubies/ruby-2.2.4/lib/ruby/2.2.0/mkmf.rb:321:in `open'
from /usr/local/rvm/rubies/ruby-2.2.4/lib/ruby/2.2.0/mkmf.rb:347:in `postpone'
from /usr/local/rvm/rubies/ruby-2.2.4/lib/ruby/2.2.0/mkmf.rb:910:in `checking_for'
from /usr/local/rvm/rubies/ruby-2.2.4/lib/ruby/2.2.0/mkmf.rb:1059:in `have_header'
from extconf.rb:3:in `<main>'
extconf failed, exit code 1
Gem files will remain installed in /usr/local/rvm/gems/ruby-2.2.4/gems/nio4r-1.2.1 for inspection.
Results logged to /usr/local/rvm/gems/ruby-2.2.4/extensions/x86_64-linux/2.2.0/nio4r-1.2.1/gem_make.out
An error occurred while installing nio4r (1.2.1), and Bundler cannot continue.
Make sure that `gem install nio4r -v '1.2.1'` succeeds before bundling.
我正在使用 Putty.exe 按照教程 https://www.digitalocean.com/community/tutorials/how-to-use-the-ruby-on-rails-one-click-application-on-digitalocean 进行配置
我正在使用 Ruby ruby 2.2.4p230 rails 5.0.0.1
不确定这是否有帮助。当我使用 Putty.exe 配置我的网站时，教程说如果你的 Gemfile 指定的 Ruby 版本与系统上安装的版本不同，你可以使用 RVM 安装它。所以我尝试了:
rvm install 2.2.4
rvm use ruby-2.2.4-p230 --default
但我收到错误消息 ruby-2.2.4-p230 未安装。而且安装不了，因为系统找不到具体的版本。所以我用
rvm use ruby-2.2.4
最佳答案
sudo apt-get install build-essential
对我有用
关于ruby-on-rails - 安装nio4r(1.2.1)时出错，Bundler无法继续，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/39804090/