install ERROR

[gerrylon]

/ # fluent-gem install fluent-plugin-sflow

Building native extensions. This could take a while...
ERROR:  Error installing fluent-plugin-sflow:
        ERROR: Failed to build gem native extension.

    current directory: /usr/lib/ruby/gems/2.5.0/gems/fluent-plugin-sflow-0.3.3/ext/sflowtool
/usr/bin/ruby -r ./siteconf20190424-137-1bgl375.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 /usr/lib/ruby/gems/2.5.0/gems/fluent-plugin-sflow-0.3.3 for inspection.
Results logged to /usr/lib/ruby/gems/2.5.0/extensions/x86_64-linux/2.5.0/fluent-plugin-sflow-0.3.3/gem_make.out

[codeout]

Thanks for your reporting. Could you tell me about your environment?

ruby -v
uname -a

[gnanasalten]

Some plugins depend on the native extension library. It means that you need to install development packages to build

install the below packages on the system
gcc, make, autoconf

[codeout]

Right. A problem here is that it can't be done by bundle install.

Another option is to ship pre-compiled native gems like this. It should be better but need some time to prepare CI environment. Meanwhile, I'll update the "Install" section of README.

[codeout]

I'm done updating README. Added installation hints about ruby-dev ( ruby-devel ) and build tools.

https://github.com/codeout/fluent-plugin-sflow#install