gem install jekyll 遇到 ffi.h 错误, 求 解决方法。。。

root@64f3ff50c38:/# gem install jekyll Fetching: liquid-3.0.6.gem (100%) Successfully installed liquid-3.0.6 Fetching: kramdown-1.9.0.gem (100%) Successfully installed kramdown-1.9.0 Fetching: mercenary-0.3.5.gem (100%) Successfully installed mercenary-0.3.5 Fetching: safe_yaml-1.0.4.gem (100%) Successfully installed safe_yaml-1.0.4 Fetching: colorator-0.1.gem (100%) Successfully installed colorator-0.1 Fetching: rouge-1.10.1.gem (100%) Successfully installed rouge-1.10.1 Fetching: sass-3.4.19.gem (100%) Successfully installed sass-3.4.19 Fetching: jekyll-sass-converter-1.3.0.gem (100%) Successfully installed jekyll-sass-converter-1.3.0 Fetching: rb-fsevent-0.9.6.gem (100%) Successfully installed rb-fsevent-0.9.6 Fetching: ffi-1.9.10.gem (100%) Building native extensions. This could take a while... ERROR: Error installing jekyll: ERROR: Failed to build gem native extension. current directory: /usr/local/bundle/gems/ffi-1.9.10/ext/ffi_c /usr/local/bin/ruby -r ./siteconf20151111-5-1ydpmrp.rb extconf.rb checking for ffi.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/bin/$(RUBY_BASE_NAME) --with-ffi_c-dir --without-ffi_c-dir --with-ffi_c-include --without-ffi_c-include=${ffi_c-dir}/include --with-ffi_c-lib --without-ffi_c-lib=${ffi_c-dir}/lib --with-libffi-config --without-libffi-config --with-pkg-config --without-pkg-config /usr/local/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/lib/ruby/2.2.0/mkmf.rb:587:in `try_cpp' from /usr/local/lib/ruby/2.2.0/mkmf.rb:1060:in `block in have_header' from /usr/local/lib/ruby/2.2.0/mkmf.rb:911:in `block in checking_for' from /usr/local/lib/ruby/2.2.0/mkmf.rb:351:in `block (2 levels) in postpone' from /usr/local/lib/ruby/2.2.0/mkmf.rb:321:in `open' from /usr/local/lib/ruby/2.2.0/mkmf.rb:351:in `block in postpone' from /usr/local/lib/ruby/2.2.0/mkmf.rb:321:in `open' from /usr/local/lib/ruby/2.2.0/mkmf.rb:347:in `postpone' from /usr/local/lib/ruby/2.2.0/mkmf.rb:910:in `checking_for' from /usr/local/lib/ruby/2.2.0/mkmf.rb:1059:in `have_header' from extconf.rb:16:in `<main>' 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/2.2.0-static/ffi-1.9.10/mkmf.log extconf failed, exit code 1 Gem files will remain installed in /usr/local/bundle/gems/ffi-1.9.10 for inspection. Results logged to /usr/local/bundle/extensions/x86_64-linux/2.2.0-static/ffi-1.9.10/gem_make.out 

root@64f63ff50c38:/# apt-get install libffi-dev Reading package lists... Done Building dependency tree Reading state information... Done libffi-dev is already the newest version. 0 upgraded, 0 newly installed, 0 to remove and 5 not upgraded.