Macでrbenvから入れたRuby 2.4.2にRailsをインストールしようとしたら失敗する(Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers.)

Technology

新規購入時とかOS再インストール時とかで毎回忘れてしまうのでメモしておきます。

TL;DR

以下を行う
* xcode-select --installでXcode Command Line Tools入れる
* Xcode起動して規約を読んで同意する

詳細

実行コマンドとログを垂れ流します。

$ gem install rails

Fetching: concurrent-ruby-1.0.5.gem (100%)
Successfully installed concurrent-ruby-1.0.5
Fetching: i18n-0.9.1.gem (100%)
Successfully installed i18n-0.9.1
Fetching: thread_safe-0.3.6.gem (100%)
Successfully installed thread_safe-0.3.6
Fetching: tzinfo-1.2.4.gem (100%)
Successfully installed tzinfo-1.2.4
Fetching: activesupport-5.1.4.gem (100%)
Successfully installed activesupport-5.1.4
Fetching: rack-2.0.3.gem (100%)
Successfully installed rack-2.0.3
Fetching: rack-test-0.7.0.gem (100%)
Successfully installed rack-test-0.7.0
Fetching: mini_portile2-2.3.0.gem (100%)
Successfully installed mini_portile2-2.3.0
Fetching: nokogiri-1.8.1.gem (100%)
Building native extensions.  This could take a while...
ERROR:  Error installing rails:
    ERROR: Failed to build gem native extension.

    current directory: /Users/[your_name]/.rbenv/versions/2.4.2/lib/ruby/gems/2.4.0/gems/nokogiri-1.8.1/ext/nokogiri
/Users/[your_name]/.rbenv/versions/2.4.2/bin/ruby -r ./siteconf20171111-1305-1har2zy.rb extconf.rb
checking if the C compiler accepts ... *** 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=/Users/[your_name]/.rbenv/versions/2.4.2/bin/$(RUBY_BASE_NAME)
    --help
    --clean
/Users/[your_name]/.rbenv/versions/2.4.2/lib/ruby/2.4.0/mkmf.rb:457:in `try_do': The compiler failed to generate an executable file. (RuntimeError)
You have to install development tools first.
    from /Users/[your_name]/.rbenv/versions/2.4.2/lib/ruby/2.4.0/mkmf.rb:572:in `block in try_compile'
    from /Users/[your_name]/.rbenv/versions/2.4.2/lib/ruby/2.4.0/mkmf.rb:523:in `with_werror'
    from /Users/[your_name]/.rbenv/versions/2.4.2/lib/ruby/2.4.0/mkmf.rb:572:in `try_compile'
    from extconf.rb:138:in `nokogiri_try_compile'
    from extconf.rb:162:in `block in add_cflags'
    from /Users/[your_name]/.rbenv/versions/2.4.2/lib/ruby/2.4.0/mkmf.rb:630:in `with_cflags'
    from extconf.rb:161:in `add_cflags'
    from extconf.rb:407:in `<main>'

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

  /Users/[your_name]/.rbenv/versions/2.4.2/lib/ruby/gems/2.4.0/extensions/x86_64-darwin-16/2.4.0-static/nokogiri-1.8.1/mkmf.log

extconf failed, exit code 1

Gem files will remain installed in /Users/[your_name]/.rbenv/versions/2.4.2/lib/ruby/gems/2.4.0/gems/nokogiri-1.8.1 for inspection.
Results logged to /Users/[your_name]/.rbenv/versions/2.4.2/lib/ruby/gems/2.4.0/extensions/x86_64-darwin-16/2.4.0-static/nokogiri-1.8.1/gem_make.out

$ gem uninstall rails
$ xcode-select --install
# Xcodeを起動して規約を読み同意する。
$ gem install rails

Building native extensions.  This could take a while...
Successfully installed nokogiri-1.8.1
Fetching: crass-1.0.2.gem (100%)
Successfully installed crass-1.0.2
Fetching: loofah-2.1.1.gem (100%)
Successfully installed loofah-2.1.1
Fetching: rails-html-sanitizer-1.0.3.gem (100%)
Successfully installed rails-html-sanitizer-1.0.3
Fetching: rails-dom-testing-2.0.3.gem (100%)
Successfully installed rails-dom-testing-2.0.3
Fetching: builder-3.2.3.gem (100%)
Successfully installed builder-3.2.3
Fetching: erubi-1.7.0.gem (100%)
Successfully installed erubi-1.7.0
Fetching: actionview-5.1.4.gem (100%)
Successfully installed actionview-5.1.4
Fetching: actionpack-5.1.4.gem (100%)
Successfully installed actionpack-5.1.4
Fetching: activemodel-5.1.4.gem (100%)
Successfully installed activemodel-5.1.4
Fetching: arel-8.0.0.gem (100%)
Successfully installed arel-8.0.0
Fetching: activerecord-5.1.4.gem (100%)
Successfully installed activerecord-5.1.4
Fetching: globalid-0.4.1.gem (100%)
Successfully installed globalid-0.4.1
Fetching: activejob-5.1.4.gem (100%)
Successfully installed activejob-5.1.4
Fetching: mini_mime-1.0.0.gem (100%)
Successfully installed mini_mime-1.0.0
Fetching: mail-2.7.0.gem (100%)
Successfully installed mail-2.7.0
Fetching: actionmailer-5.1.4.gem (100%)
Successfully installed actionmailer-5.1.4
Fetching: nio4r-2.1.0.gem (100%)
Building native extensions.  This could take a while...
Successfully installed nio4r-2.1.0
Fetching: websocket-extensions-0.1.3.gem (100%)
Successfully installed websocket-extensions-0.1.3
Fetching: websocket-driver-0.6.5.gem (100%)
Building native extensions.  This could take a while...
Successfully installed websocket-driver-0.6.5
Fetching: actioncable-5.1.4.gem (100%)
Successfully installed actioncable-5.1.4
Fetching: thor-0.20.0.gem (100%)
Successfully installed thor-0.20.0
Fetching: method_source-0.9.0.gem (100%)
Successfully installed method_source-0.9.0
Fetching: railties-5.1.4.gem (100%)
Successfully installed railties-5.1.4
Fetching: sprockets-3.7.1.gem (100%)
Successfully installed sprockets-3.7.1
Fetching: sprockets-rails-3.2.1.gem (100%)
Successfully installed sprockets-rails-3.2.1
Fetching: rails-5.1.4.gem (100%)
Successfully installed rails-5.1.4
Parsing documentation for nokogiri-1.8.1
Installing ri documentation for nokogiri-1.8.1
Parsing documentation for crass-1.0.2
Installing ri documentation for crass-1.0.2
Parsing documentation for loofah-2.1.1
Installing ri documentation for loofah-2.1.1
Parsing documentation for rails-html-sanitizer-1.0.3
Installing ri documentation for rails-html-sanitizer-1.0.3
Parsing documentation for rails-dom-testing-2.0.3
Installing ri documentation for rails-dom-testing-2.0.3
Parsing documentation for builder-3.2.3
Installing ri documentation for builder-3.2.3
Parsing documentation for erubi-1.7.0
Installing ri documentation for erubi-1.7.0
Parsing documentation for actionview-5.1.4
Installing ri documentation for actionview-5.1.4
Parsing documentation for actionpack-5.1.4
Installing ri documentation for actionpack-5.1.4
Parsing documentation for activemodel-5.1.4
Installing ri documentation for activemodel-5.1.4
Parsing documentation for arel-8.0.0
Installing ri documentation for arel-8.0.0
Parsing documentation for activerecord-5.1.4
Installing ri documentation for activerecord-5.1.4
Parsing documentation for globalid-0.4.1
Installing ri documentation for globalid-0.4.1
Parsing documentation for activejob-5.1.4
Installing ri documentation for activejob-5.1.4
Parsing documentation for mini_mime-1.0.0
Installing ri documentation for mini_mime-1.0.0
Parsing documentation for mail-2.7.0
Installing ri documentation for mail-2.7.0
Parsing documentation for actionmailer-5.1.4
Installing ri documentation for actionmailer-5.1.4
Parsing documentation for nio4r-2.1.0
Installing ri documentation for nio4r-2.1.0
Parsing documentation for websocket-extensions-0.1.3
Installing ri documentation for websocket-extensions-0.1.3
Parsing documentation for websocket-driver-0.6.5
Installing ri documentation for websocket-driver-0.6.5
Parsing documentation for actioncable-5.1.4
Installing ri documentation for actioncable-5.1.4
Parsing documentation for thor-0.20.0
Installing ri documentation for thor-0.20.0
Parsing documentation for method_source-0.9.0
Installing ri documentation for method_source-0.9.0
Parsing documentation for railties-5.1.4
Installing ri documentation for railties-5.1.4
Parsing documentation for sprockets-3.7.1
Installing ri documentation for sprockets-3.7.1
Parsing documentation for sprockets-rails-3.2.1
Installing ri documentation for sprockets-rails-3.2.1
Parsing documentation for rails-5.1.4
Installing ri documentation for rails-5.1.4
Done installing documentation for nokogiri, crass, loofah, rails-html-sanitizer, rails-dom-testing, builder, erubi, actionview, actionpack, activemodel, arel, activerecord, globalid, activejob, mini_mime, mail, actionmailer, nio4r, websocket-extensions, websocket-driver, actioncable, thor, method_source, railties, sprockets, sprockets-rails, rails after 40 seconds
27 gems installed