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@riocampos(riocampos)

ruby-qml gem をインストール

Last updated at Posted at 2014-07-31

RubyとQML/Qt Quickでデスクトップ用GUIアプリを書けるgem「ruby-qml」を作った - Qiita
をインストールしようとして、いきなり失敗したので、その備忘録。

環境

MacBook Pro with Retina 13" (Late 2013) 2.4 GHz Intel Core i5

Qt インストーラのダウンロード

Download Qt | Qt Project
から
Qt Online Installer for MacOS (9.4 MB)（インストーラのバージョンは1.6.0）
をダウンロード。

Qt インストール

詳細を記録し落としたのですが、インストール先は標準にしていたと思います。
現在のインストール先は ~/Qtです。
Qt 5.3.1 (Clang 5.0 (Apple), 64bit) の Qt Creator がインストールされました。

2014/7/1追記：ruby-qml-0.0.5 でインストールに成功

上記手順で Qt をインストールしたあとに
ruby-qml by seanchas116 に記載されているように

$ brew install pkg-config libffi
$ gem install qml -- --with-libffi-dir=$(brew --prefix libffi) --with-qt-dir=$HOME/Qt/5.3/clang_64

を実行することでインストールが出来ました（--with-qt-dir=$HOME/Qt/5.3/clang_64 の部分は Qt インストール環境に合わせてください）。
Homebrew で Qt もインストールする場合には

$ brew install pkg-config libffi qt5
$ gem install qml -- --with-libffi-dir=$(brew --prefix libffi) --with-qt-dir=$(brew --prefix qt5)

で行えるそうです。

以下は ruby-qml-0.0.4 での履歴です

念のために残しておきます。

ruby-qml gem をインストール（失敗１）

$ gem install qml 
Fetching: qml-0.0.4.gem (100%)
Building native extensions.  This could take a while...
ERROR:  Error installing qml:
        ERROR: Failed to build gem native extension.

        /Users/riocampos/.rbenv/versions/1.9.3-p484/bin/ruby extconf.rb
checking for pkg-config... yes
checking for qmake... no
checking for moc... no
qmake executable not found
*** 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/riocampos/.rbenv/versions/1.9.3-p484/bin/ruby
    --with-pkg-config
    --without-pkg-config
    --with-qt-dir
    --without-qt-dir
    --with-libffi-dir
    --without-libffi-dir


Gem files will remain installed in /Users/riocampos/.rbenv/versions/1.9.3-p484/lib/ruby/gems/1.9.1/gems/qml-0.0.4 for inspection.
Results logged to /Users/riocampos/.rbenv/versions/1.9.3-p484/lib/ruby/gems/1.9.1/gems/qml-0.0.4/ext/qml/gem_make.out

native extensionsのビルドで失敗したと思われます。 qmake が見付からない、らしい。

qmake はどこだ

Qtのインストール先が ~/Qt なので qmake は ~/Qt/5.3/clang_64/bin にありました。しかし PATH が通っていません。通しましょう。

~/.bashrc
# Qt5.3
export PATH="$HOME/Qt/5.3/clang_64/bin:$PATH"

ruby-qml gem をインストール（失敗２）

$ gem install qml
Building native extensions.  This could take a while...
ERROR:  Error installing qml:
        ERROR: Failed to build gem native extension.

        /Users/riocampos/.rbenv/versions/1.9.3-p484/bin/ruby extconf.rb
checking for pkg-config... yes
checking for qmake... yes
checking for moc... yes
building plugins...
　：（中略）
Package Qt5Core was not found in the pkg-config search path.
Perhaps you should add the directory containing `Qt5Core.pc'
to the PKG_CONFIG_PATH environment variable
No package 'Qt5Core' found
Package Qt5Core was not found in the pkg-config search path.
Perhaps you should add the directory containing `Qt5Core.pc'
to the PKG_CONFIG_PATH environment variable
No package 'Qt5Core' found
Package Qt5Gui was not found in the pkg-config search path.
Perhaps you should add the directory containing `Qt5Gui.pc'
to the PKG_CONFIG_PATH environment variable
No package 'Qt5Gui' found
Package Qt5Gui was not found in the pkg-config search path.
Perhaps you should add the directory containing `Qt5Gui.pc'
to the PKG_CONFIG_PATH environment variable
No package 'Qt5Gui' found
Package Qt5Widgets was not found in the pkg-config search path.
Perhaps you should add the directory containing `Qt5Widgets.pc'
to the PKG_CONFIG_PATH environment variable
No package 'Qt5Widgets' found
Package Qt5Widgets was not found in the pkg-config search path.
Perhaps you should add the directory containing `Qt5Widgets.pc'
to the PKG_CONFIG_PATH environment variable
No package 'Qt5Widgets' found
Package Qt5Qml was not found in the pkg-config search path.
Perhaps you should add the directory containing `Qt5Qml.pc'
to the PKG_CONFIG_PATH environment variable
No package 'Qt5Qml' found
Package Qt5Qml was not found in the pkg-config search path.
Perhaps you should add the directory containing `Qt5Qml.pc'
to the PKG_CONFIG_PATH environment variable
No package 'Qt5Qml' found
Package Qt5Quick was not found in the pkg-config search path.
Perhaps you should add the directory containing `Qt5Quick.pc'
to the PKG_CONFIG_PATH environment variable
No package 'Qt5Quick' found
Package Qt5Quick was not found in the pkg-config search path.
Perhaps you should add the directory containing `Qt5Quick.pc'
to the PKG_CONFIG_PATH environment variable
No package 'Qt5Quick' found
Package libffi was not found in the pkg-config search path.
Perhaps you should add the directory containing `libffi.pc'
to the PKG_CONFIG_PATH environment variable
No package 'libffi' found
Package libffi was not found in the pkg-config search path.
Perhaps you should add the directory containing `libffi.pc'
to the PKG_CONFIG_PATH environment variable
No package 'libffi' found
Package Qt5Core was not found in the pkg-config search path.
Perhaps you should add the directory containing `Qt5Core.pc'
to the PKG_CONFIG_PATH environment variable
No package 'Qt5Core' found
Package Qt5Core was not found in the pkg-config search path.
Perhaps you should add the directory containing `Qt5Core.pc'
to the PKG_CONFIG_PATH environment variable
No package 'Qt5Core' found
checking for QObject... no
header not found: QObject
*** 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/riocampos/.rbenv/versions/1.9.3-p484/bin/ruby
    --with-pkg-config
    --without-pkg-config
    --with-qt-dir
    --without-qt-dir
    --with-libffi-dir
    --without-libffi-dir
    --enable-debug
    --disable-debug


Gem files will remain installed in /Users/riocampos/.rbenv/versions/1.9.3-p484/lib/ruby/gems/1.9.1/gems/qml-0.0.4 for inspection.
Results logged to /Users/riocampos/.rbenv/versions/1.9.3-p484/lib/ruby/gems/1.9.1/gems/qml-0.0.4/ext/qml/gem_make.out

PKG_CONFIG_PATH に Qt5Core.pc などのあるディレクトリを指定しろということですね。

Qt5Core.pc とかはどこだ

~/Qt/5.3/clang_64/lib/pkgconfig にあります（が、全てでは無かったですorz）。
ので

export PKG_CONFIG_PATH="$HOME/Qt/5.3/clang_64/lib/pkgconfig"

として場所を教えましょう。

ruby-qml gem をインストール（失敗３）

エラーログの要点のみを。

Package libffi was not found in the pkg-config search path.
Perhaps you should add the directory containing `libffi.pc'
to the PKG_CONFIG_PATH environment variable
No package 'libffi' found
Package libffi was not found in the pkg-config search path.
Perhaps you should add the directory containing `libffi.pc'
to the PKG_CONFIG_PATH environment variable
No package 'libffi' found
checking for QObject... no
header not found: QObject
*** 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.

libffi はどこよ

入ってませんでした。Homebrew でインストールできます。

$ brew install libffi
Warning: libffi-3.0.13 already installed

ありゃ。

$ brew info libffi
libffi: stable 3.0.13 (bottled), HEAD
http://sourceware.org/libffi/

This formula is keg-only.
Mac OS X already provides this software and installing another version in
parallel can cause all kinds of trouble.

Some formulae require a newer version of libffi.

/usr/local/Cellar/libffi/3.0.13 (13 files, 388K)
  Poured from bottle
From: https://github.com/Homebrew/homebrew/blob/master/Library/Formula/libffi.rb

Keg-only なので動いてませんね。動かしましょう。

brew link libffi --force
Linking /usr/local/Cellar/libffi/3.0.13... 9 symlinks created

ruby-qml gem をインストール（失敗４）

残ったエラーはこれだけ。

checking for QObject... no
header not found: QObject
*** 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.

もう分からんですorz
ヘッダファイル ~/Qt/5.3/clang_64/lib/QtCore.framework/Versions/5/Headers/qobject.h のディレクトリを訊ねているのかと思って

export PKG_CONFIG_PATH="$HOME/Qt/5.3/clang_64/lib/QtCore.framework/Versions/5/Headers:$HOME/Qt/5.3/clang_64/lib/pkgconfig"

を指定したけれども同じエラーが返ってきた。

エラーログ ~/.rbenv/versions/1.9.3-p484/lib/ruby/gems/1.9.1/gems/qml-0.0.4/ext/qml/mkmf.log は
qml-0.0.4 gem install error log
に置きました。

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