capybara-webkit インストール時のトラブルシューティング #02

環境

項目	バージョン
OS	CentOS 6.5
Ruby	ruby 2.1.3p242 (2014-09-19 revision 47630) [x86_64-linux]
Rails	4.1.6
xml2-config	2.7.6
xslt-config	1.1.26

状況

1. rails new で新規プロジェクトを作成
2. Gemfile に capybara と capybara-webkit を追加
3. bundle install を実行
4. 次のエラーが発生

エラー

[vagrant@vagrant-centos65 foo]$ bundle
Fetching gem metadata from https://rubygems.org/..........
Resolving dependencies...
# --- 省略 ---
Using capybara 2.4.4

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    /home/vagrant/.rbenv/versions/2.1.3/bin/ruby extconf.rb 
Command 'qmake -spec linux-g++ ' not available

Makefile not found

Gem files will remain installed in /home/vagrant/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/gems/capybara-webkit-1.3.1 for inspection.
Results logged to /home/vagrant/.rbenv/versions/2.1.3/lib/ruby/gems/2.1.0/extensions/x86_64-linux/2.1.0-static/capybara-webkit-1.3.1/gem_make.out
An error occurred while installing capybara-webkit (1.3.1), and Bundler cannot continue.
Make sure that `gem install capybara-webkit -v '1.3.1'` succeeds before bundling.

対策

このページの CentOS 6.5 の場合の手順に従って作業する。
Installing Qt and compiling capybara webkit · thoughtbot/capybara-webkit Wiki

1.Qtのソースをダウンロード

$ cd ~/Downloads
$ wget http://download.qt-project.org/official_releases/qt/4.8/4.8.6/qt-everywhere-opensource-src-4.8.6.tar.gz 

2.configure

$ tar xzvf qt-everywhere-opensource-src-4.8.6.tar.gz
$ cd qt-everywhere-opensource-src-4.8.6
$ ./configure

Which edition of Qt do you want to use ?

Type 'c' if you want to use the Commercial Edition.
Type 'o' if you want to use the Open Source Edition.

o
{--SNIP--}
Qt is now configured for building. Just run 'gmake'.
Once everything is built, you must run 'gmake install'.
Qt will be installed into /usr/local/Trolltech/Qt-4.8.6

To reconfigure, run 'gmake confclean' and 'configure'.

この時にこんなエラーが表示された時は [Qtインストール時のトラブルシューティング] を参照。

エラー

# ---省略---
Basic XLib functionality test failed!
 You might need to modify the include and library search paths by editing
 QMAKE_INCDIR_X11 and QMAKE_LIBDIR_X11 in /home/vagrant/Downloads/qt-everywhere-opensource-src-4.8.6/mkspecs/linux-g++.

3.コンパイル

$ gmake

4.インストール

$ sudo gmake install
$ sudo ln -s /usr/local/Trolltech/Qt-4.8.6/bin/qmake /usr/bin/qmake