Error installing nio4r

Question

Help me, please. I'm try to install gem nio4r, but have error with this logs:

ERROR:  Error installing nio4r:
    ERROR: Failed to build gem native extension.

    current directory: /var/lib/gems/2.3.0/gems/nio4r-1.2.1/ext/nio4r
/usr/bin/ruby2.3 -r ./siteconf20161020-13985-1c6zxok.rb extconf.rb
mkmf.rb can't find header files for ruby at /usr/lib/ruby/include/ruby.h

extconf failed, exit code 1

Gem files will remain installed in /var/lib/gems/2.3.0/gems/nio4r-1.2.1 for inspection.
Results logged to /var/lib/gems/2.3.0/extensions/x86_64-linux/2.3.0/nio4r-1.2.1/gem_make.out

I have ubuntu 16.04, ruby 2.3.0, rails 5.0.0.1.

(with some other gems I have similar error (gem bcrypt))

What I must did to fix this bug? Thank's!

Answer 1

首先尝试安装build essentials：

sudo apt-get install build-essential patch

如果仍然无法尝试安装ruby-dev：

sudo apt-get install ruby-dev zlib1g-dev liblzma-dev

问候

Answer 2

我在Mac上，我通过输入以下代码修复它

xcode-select --install
gem install rails

Answer 3

对我来说，此错误消息的根本原因是Xcode已更新并且我尚未接受新的许可协议，因此（出于某种原因）它限制了对CLT的访问（命令行工具-这就是{{ 1}}命令安装）。

如果已经安装了CLT，则可能需要运行以下命令才能使它们工作：

xcode-select --install

这就是解决我的问题的原因；我希望它可以帮助其他人。

Answer 4

版本2.1.0适用于

sudo apt-get install libgmp3-dev