Arrow GLib is a wrapper library for Arrow C++. Arrow GLib provides C API.

Arrow GLib supports GObject Introspection. It means that you can create language bindings at runtime or compile time.

For example, you can use Apache Arrow from Ruby by Arrow GLib and gobject-introspection gem with the following code:

# Generate bindings at runtime
require "gi"
Arrow = GI.load("Arrow")

# Now, you can access arrow::BooleanArray in Arrow C++ by
# Arrow::BooleanArray
p Arrow::BooleanArray

In Ruby case, you should use red-arrow gem. It's based on gobject-introspection gem. It adds many convenient features to raw gobject-introspection gem based bindings.

You can use packages or build by yourself to install Arrow GLib. It's recommended that you use packages.

Note that the packages are "unofficial". "Official" packages will be released in the future.

We support two build systems, GNU Autotools and Meson. If you find problems when installing please see common build problems.

See install document for details.

Arrow GLib users should use released source archive to build Arrow GLib (replace the version number in the following commands with the one you use):

% wget https://archive.apache.org/dist/arrow/arrow-0.3.0/apache-arrow-0.3.0.tar.gz
% tar xf apache-arrow-0.3.0.tar.gz
% cd apache-arrow-0.3.0

You need to build and install Arrow C++ before you build and install Arrow GLib. See Arrow C++ document about how to install Arrow C++.

If you use macOS with Homebrew, you must install required packages and set PKG_CONFIG_PATH before build Arrow GLib:

If you use GNU Autotools, you can build and install Arrow GLib by the followings:

macOS:

% cd c_glib
% brew bundle
% ./configure PKG_CONFIG_PATH=$(brew --prefix libffi)/lib/pkgconfig:$PKG_CONFIG_PATH
% make
% sudo make install

Others:

% cd c_glib
% ./configure
% make
% sudo make install

If you use Meson, you can build and install Arrow GLib by the followings:

macOS:

% cd c_glib
% brew bundle
% PKG_CONFIG_PATH=$(brew --prefix libffi)/lib/pkgconfig:$PKG_CONFIG_PATH meson build --buildtype=release
% ninja -C build
% sudo ninja -C build install

Others:

% cd c_glib
% meson build --buildtype=release
% ninja -C build
% sudo ninja -C build install

You need to install Arrow C++ before you install Arrow GLib. See Arrow C++ document about how to install Arrow C++.

You need GTK-Doc and GObject Introspection to build Arrow GLib. You can install them by the followings:

On Debian GNU/Linux or Ubuntu:

% sudo apt install -y -V gtk-doc-tools autoconf-archive libgirepository1.0-dev meson ninja-build

On CentOS 7 or later:

% sudo yum install -y gtk-doc gobject-introspection-devel
% sudo pip install -y meson ninja

On macOS with Homebrew:

% brew bundle

If you use GNU Autotools, you can build and install Arrow GLib by the followings:

% cd c_glib
% ./autogen.sh
% ./configure --enable-gtk-doc
% make
% sudo make install

You need to set PKG_CONFIG_PATH to configure On macOS:

% ./configure PKG_CONFIG_PATH=$(brew --prefix libffi)/lib/pkgconfig:$PKG_CONFIG_PATH --enable-gtk-doc

If you use Meson, you can build and install Arrow GLib by the followings:

% cd c_glib
% meson build -Dgtk_doc=true
% ninja -C build
% sudo ninja -C build install

You need to set PKG_CONFIG_PATH on macOS:

% PKG_CONFIG_PATH=$(brew --prefix libffi)/lib/pkgconfig:$PKG_CONFIG_PATH meson build -Dgtk_doc=true

You can use Arrow GLib with C or other languages. If you use Arrow GLib with C, you use C API. If you use Arrow GLib with other languages, you use GObject Introspection based bindings.

You can find API reference in the /usr/local/share/gtk-doc/html/arrow-glib/ directory. If you specify --prefix to configure, the directory will be different.

You can find example codes in the example/ directory.

You can use Arrow GLib with non C languages with GObject Introspection based bindings. Here are languages that support GObject Introspection:

• Ruby: red-arrow gem should be used.

  • Examples: https://github.com/red-data-tools/red-arrow/tree/master/example

• Python: PyGObject should be used. (Note that you should prefer PyArrow over Arrow GLib.)

• Lua: LGI should be used.

  • Examples: example/lua/ directory.

• Go: Go-gir-generator should be used. (Note that you should use Apache Arrow for Go than Arrow GLib.)

See also Projects/GObjectIntrospection/Users - GNOME Wiki! for other languages.

Arrow GLib has unit tests. You can confirm that you install Arrow GLib correctly by running unit tests.

You need to install the followings to run unit tests:

• Ruby
• gobject-introspection gem
• test-unit gem

You can install them by the followings:

On Debian GNU/Linux or Ubuntu:

% sudo apt install -y -V ruby-dev
% sudo gem install bundler
% (cd c_glib && bundle install)

On CentOS 7 or later:

% sudo yum install -y git
% git clone https://github.com/sstephenson/rbenv.git ~/.rbenv
% git clone https://github.com/sstephenson/ruby-build.git ~/.rbenv/plugins/ruby-build
% echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bash_profile
% echo 'eval "$(rbenv init -)"' >> ~/.bash_profile
% exec ${SHELL} --login
% sudo yum install -y gcc make patch openssl-devel readline-devel zlib-devel
% rbenv install 2.4.1
% rbenv global 2.4.1
% gem install bundler
% (cd c_glib && bundle install)

On macOS with Homebrew:

% (cd c_glib && bundle install)

Now, you can run unit tests by the followings:

% cd c_glib
% bundle exec test/run-test.sh

• Check whether autoconf-archive is installed.
• [macOS] autoconf-archive must be linked, but may not be linked. You can check it by running brew install autoconf-archive again. If it's not linked, it will show a warning message like:

% brew install autoconf-archive
Warning: autoconf-archive 2017.03.21 is already installed, it's just not linked.
You can use `brew link autoconf-archive` to link this version.

In this case, you need to run brew link autoconf-archive. It may fail with the following message if you have install conflicted packages (e.g. gnome-common).

% brew link autoconf-archive
Linking /usr/local/Cellar/autoconf-archive/2017.03.21...
Error: Could not symlink share/aclocal/ax_check_enable_debug.m4
Target /usr/local/share/aclocal/ax_check_enable_debug.m4
is a symlink belonging to gnome-common. You can unlink it:
  brew unlink gnome-common

You need to run brew unlink <pkgname>, then run brew link autoconf-archive again.

After installing/linking autoconf-archive, run ./autogen.sh again.

gobject-introspection requires libffi, and it's automatically installed with gobject-introspection. However it can't be found because it's keg-only. You need to set PKG_CONFIG_PATH when executing configure.

% ./configure PKG_CONFIG_PATH=$(brew --prefix libffi)/lib/pkgconfig

Arrow C++ must be installed to build Arrow GLib. Run make install on Arrow C++ build directory. In addtion, on linux, you may need to run sudo ldconfig.

On macOS you may need to set the following environment variable:

% export XML_CATALOG_FILES="/usr/local/etc/xml/catalog"

On macOS if you see the following error you may need to upgrade source-highlight

dyld: Symbol not found: __ZN5boost16re_detail_10650112perl_matcherIPKcNSt3__19allocatorINS_9sub_matchIS3_EEEENS_12regex_traitsIcNS_16cpp_regex_traitsIcEEEEE14construct_initERKNS_11basic_regexIcSC_EENS_15regex_constants12_match_flagsE
  Referenced from: /usr/local/Cellar/source-highlight/3.1.8_7/lib/libsource-highlight.4.dylib
  Expected in: flat namespace
 in /usr/local/Cellar/source-highlight/3.1.8_7/lib/libsource-highlight.4.dylib

To fix do:

% brew upgrade source-highlight