紀錄一下手動安裝 ruby 的 install path

ruby..

$sudo make install
...
...
installing binary commands:   /usr/local/bin
installing base libraries:    /usr/local/lib
installing arch files:        /usr/local/lib/ruby/2.1.0/armv7l-linux-eabihf
installing pkgconfig data:    /usr/local/lib/pkgconfig
installing command scripts:   /usr/local/bin
installing library scripts:   /usr/local/lib/ruby/2.1.0
installing common headers:    /usr/local/include/ruby-2.1.0
installing manpages:          /usr/local/share/man/man1
installing extension objects: /usr/local/lib/ruby/2.1.0/armv7l-linux-eabihf
installing extension objects: /usr/local/lib/ruby/site_ruby/2.1.0/armv7l-linux-eabihf
installing extension objects: /usr/local/lib/ruby/vendor_ruby/2.1.0/armv7l-linux-eabihf
installing extension headers: /usr/local/include/ruby-2.1.0/armv7l-linux-eabihf
installing extension scripts: /usr/local/lib/ruby/2.1.0
installing extension scripts: /usr/local/lib/ruby/site_ruby/2.1.0
installing extension scripts: /usr/local/lib/ruby/vendor_ruby/2.1.0
installing extension headers: /usr/local/include/ruby-2.1.0/ruby
installing default gems:      /usr/local/lib/ruby/gems/2.1.0 (build_info, cache, doc, extensions, gems, specifications)
                              bigdecimal 1.2.4
                              io-console 0.4.3
                              json 1.8.1
                              minitest 4.7.5
                              psych 2.0.5
                              rake 10.1.0
                              rdoc 4.1.0
                              test-unit 2.1.7.0