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How to build Mozc on OS X

macOS

Get the Code

You can download Mozc source code as follows:

mkdir -p ~/work
cd ~/work
git clone https://github.com/google/mozc.git -b master --single-branch --recursive

System Requirements

64-bit macOS 10.14 and later versions are supported.

Software Requirements

Building on Mac requires the following software.

If you don't need to run gui tools like about dialog, config dialog, or dictionary tool, you can omit installing Qt. Candidate window still shows without Qt. See below for the detailed information.

Build Qt

Qt is required for GUI tools. The following is an example of build configuration.

# extract Qt.tar.gz to ~/myqt.
cd ~/myqt
./configure -opensource -developer-build -platform macx-clang -release
make

Bazel build

Edit src/config.bzl

Modify variables in src/config.bzl to fit your environment. Note: ~ does not represent the home directory. The exact path should be specified (e.g. MACOS_QT_PATH = "/Users/mozc/myqt").

Tips: the following command makes the specified file untracked by Git.

git update-index --assume-unchanged src/config.bzl

This command reverts the above change.

git update-index --no-assume-unchanged src/config.bzl

Build installer

cd ~/work/mozc/src
bazel build package --config macos -c opt
open bazel-bin/mac/Mozc.pkg

Unittests

bazel test ... --config oss_macos -c dbg -- -net/... -third_party/...

See build Mozc in Docker for details.

Build with GYP (maintenance mode)

GYP build is under maintenance mode. Bazel build is recommended.

While the existing targets are supported by both GYP and Bazel as much as possible, new targets will be supported by Bazel only.

Targets only for Bazel:

  • AUX dictionary (//data/dictionary_oss:aux_dictionary)
  • Filtered dictionary (//data/dictionary_oss:filtered_dictionary)
  • SVS character input instead of CJK compatibility ideographs (//rewriter:single_kanji_rewriter)
  • Zip code conversion (//server:mozc_server)

Software Requirements

For GYP build, Ninja is also required.

Path to Python3

You might need to use the preinstalled Python3 (i.e. /usr/bin/python3). Make sure the path to python3.

% whereis python3
/usr/bin/python3

Install python3 dependencies

python3 -m pip install six

Apply a patch to GYP

The upstream GYP may or may not work on macOS for Mozc. You probably need to apply the following patch to GYP.

cd src\third_party\gyp
git apply ..\..\gyp\gyp.patch

Build main converter and composition UI.

First, you'll need to generate Xcode project using a tool called GYP.

cd ~/work/mozc/src
GYP_DEFINES="mac_sdk=10.15 mac_deployment_target=10.9" python3 build_mozc.py gyp --noqt

You can customize the SDK version and target OS version here. Then, build Mozc.app and necessary files:

python3 build_mozc.py build -c Release mac/mac.gyp:GoogleJapaneseInput

Executables

Executables are written in ~/work/mozc/src/out_mac/Release for Release builds, and ~/work/mozc/src/out_mac/Debug for Debug builds. For instance, you'll have ~/work/mozc/src/out_mac/Release/Mozc.app once the build finishes successfully in the Release mode.

GUI tools

To build GUI tools, you need to specify --qtdir instead of --noqt.

GYP_DEFINES="mac_sdk=10.15 mac_deployment_target=10.9" python3 build_mozc.py gyp --qtdir ~/myqt

In the above case, ~/myqt should contain Qt's sources, headers and libraries built from configure and make.

Then you can build executables defined in gui/gui.gyp. Here is an example to build the config dialog.

python3 build_mozc.py build -c Release gui/gui.gyp:config_dialog_main

These executables are linked with the libraries in ~/myqt. You might want to change it with install_name_tool.

Installer

You can also build an installer.

GYP_DEFINES="mac_sdk=10.15 mac_deployment_target=10.9" python3 build_mozc.py gyp --qtdir ~/myqt
python3 build_mozc.py build -c Release :Installer

Clean up the Tree

To clean up the tree, execute the following. This will remove executables and intermediate files like object files, generated source files, project files, etc.

python3 build_mozc.py clean

Install built packages

Without building an installer .pkg file, you can just place the created Mozc.app into /Library/Input Methods, and mac/installer/LaunchAgents/org.mozc.inputmethod.Japanese.Converter.plist and org.mozc.inputmethod.Japanese.Renderer.plist into /Library/LaunchAgents, and then log in again. Then it works well.

sudo cp -r out_mac/Release/Mozc.app /Library/Input\ Methods/
sudo cp mac/installer/LaunchAgents/org.mozc.inputmethod.Japanese.Converter.plist /Library/LaunchAgents
sudo cp mac/installer/LaunchAgents/org.mozc.inputmethod.Japanese.Renderer.plist /Library/LaunchAgents