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# 12.3.2.1. How to build Groonga at the repository by GNU Autotools

This document describes how to build Groonga at the repository by GNU Autotools.

You can’t choose this way if you develop Groonga on Windows. If you want to use Windows for developing Groonga, see How to build Groonga at the repository by CMake on Windows.

## 12.3.2.1.1. Install depended software

TODO

> - Autoconf

> - Automake

> - GNU Libtool

> - Ruby

> - Git

> - Cutter

> - …

## 12.3.2.1.2. Checkout Groonga from the repository

Users use released source archive. But developers must build Groonga at the repository. Because source code in the repository is the latest.

The Groonga repository is hosted on GitHub. Checkout the latest source code from the repository:

    % git clone --recursive git@github.com:groonga/groonga.git

## 12.3.2.1.3. Create `configure`

You need to create `configure`. `configure` is included in source archive but not included in the repository.

`configure` is a build tool that detects your system and generates build configurations for your environment.

Run `autogen.sh` to create `configure`:

    % ./autogen.sh

## 12.3.2.1.4. Run `configure`

You can custom your build configuration by passing options to `configure`.

Here are recommended `configure` options for developers:

    % ./configure --prefix=/tmp/local --enable-debug --enable-mruby --with-ruby

Here are descriptions of these options:

`--prefix=/tmp/local`

  It specifies that you install your Groonga into temporary directory. You can do “clean install” by removing `/tmp/local` directory. It’ll be useful for debugging install.

`--enable-debug`

  It enables debug options for C/C++ compiler. It’s useful for debugging on debugger such as GDB and LLDB.

`--eanble-mruby`

  It enables mruby support. The feature isn’t enabled by default but developers should enable the feature.

`--with-ruby`

  It’s needed for `--enable-mruby` and running functional tests.

## 12.3.2.1.5. Run `make`

Now, you can build Groonga.

Here is a recommended `make` command line for developers:

    % make -j8 > /dev/null

`-j8` decreases build time. It enables parallel build. If you have 8 or more CPU cores, you can increase `8` to decreases more build time.

You can just see only warning and error messages by `> /dev/null`. Developers shouldn’t add new warnings and errors in new commit.

## 12.3.2.1.6. See also

> - テスト方法