gistfile1.txt

ERROR:  Error installing selenium-webdriver:
	ERROR: Failed to build gem native extension.

    current directory: /usr/local/bundle/gems/ffi-1.9.18/ext/ffi_c
/usr/local/bin/ruby -r ./siteconf20171225-7-vz1don.rb extconf.rb

To see why this extension failed to compile, please check the mkmf.log which can be found here:

  /usr/local/bundle/extensions/x86_64-linux/2.5.0/ffi-1.9.18/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in /usr/local/bundle/gems/ffi-1.9.18 for inspection.
Results logged to /usr/local/bundle/extensions/x86_64-linux/2.5.0/ffi-1.9.18/gem_make.out