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How to build Mozc in Windows

Windows

Summary

If you are not sure what the following commands do, please check the descriptions below and make sure the operations before running them.

git config --global core.autocrlf false
git config --global core.eol lf

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

cd C:\work\mozc\src\third_party
git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git
python3 -m pip install six

"C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvarsamd64_x86.bat"
cd C:\work\mozc\src
python build_mozc.py gyp --qtdir=C:\Qt\Qt5.15.2\msvc2019
python build_mozc.py build -c Release package

Setup

System Requirements

64-bit Windows 10 or later.

Software Requirements

Building Mozc on Windows requires the following software.

  • Visual Studio 2017, or any greater edition.
  • Python 3.7 or later
  • git
  • Qt 5 (optional for GUI)
    • 32-bit version is required because mozc_tool.exe is build as a 32-bit executable.

Setup Git configurations

The following commands change your global configuration. If you use different configurations, you might want to restore the previous configurations after the build.

git config --global core.autocrlf false
git config --global core.eol lf

Download the repository from GitHub

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

Download build tools

cd C:\work\mozc\src\third_party
git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git
python3 -m pip install six

Build

Setup Build system

If you have not set up the build system in your command prompt, you might need to execute the setup command like this.

"C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvarsamd64_x86.bat"

Build Mozc

The following command builds Mozc without Qt based GUI tools.

cd C:\work\mozc\src
python build_mozc.py gyp --noqt --msvs_version=2019
python build_mozc.py build -c Release package

To build Mozc with GUI tools, you need to specify the Qt directory.

cd C:\work\mozc\src
python build_mozc.py gyp --qtdir=C:\Qt\Qt5.15.2\msvc2019
python build_mozc.py build -c Release package

The directory of Qt (C:\Qt\Qt5.12.2\msvc2019 in this example) differs based on Qt version. If you specify --noqt option instead of --qtdir=<dir to Qt>, mozc_tool will be built as a mock version, which does nothing.

If you need debug information, you can build debug version of Mozc as follows.

python build_mozc.py build -c Debug package

Executables

You have release build binaries in C:\work\mozc\src\out_win\Release and C:\work\mozc\src\out_win\Release_x64.

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.

python build_mozc.py clean

Installation and Uninstallation

Although the code repository covers source files of the official Google Japanese Input installer (see win32/custom_action and win32/installer), building Windows Installer package for OSS Mozc is not supported yet. You need to manually copy Mozc binaries and run a command as follows.

Note that Mozc now supports two input method APIs called IMM32 and TSF (Text Services Framework). Although you can register Mozc for both APIs at the same time, IMM32 is not recommended on Windows 8 and later.

Install Mozc (32-bit)

Following files must be placed under %ProgramFiles%\Mozc.

  • C:\work\mozc\src\out_win\Release\mozc_broker32.exe
  • C:\work\mozc\src\out_win\Release\mozc_cache_service.exe
  • C:\work\mozc\src\out_win\Release\mozc_renderer.exe
  • C:\work\mozc\src\out_win\Release\mozc_server.exe
  • C:\work\mozc\src\out_win\Release\mozc_tool.exe (if you specified --noqt option)
  • C:\work\mozc\src\out_win\ReleaseDynamic\mozc_tool.exe (if you didn't specify --noqt option)
  • C:\work\mozc\src\out_win\ReleaseDynamic\Qt5Core.dll (not required if you specified --noqt option)
  • C:\work\mozc\src\out_win\ReleaseDynamic\Qt5Gui.dll (not required if you specified --noqt option)
  • C:\work\mozc\src\out_win\ReleaseDynamic\Qt5Widgets.dll (not required if you specified --noqt option)
  • C:\work\mozc\src\out_win\ReleaseDynamic\platforms\qwindows.dll (not required if you specified --noqt option)

Qt5Core.dll, Qt5Gui.dll, Qt5Widgets.dll, and qwindows.dll are not required if you specified --noqt option into the gyp command.

Register Mozc for IMM32 into 32-bit environment

Following files must be placed under %windir%\System32.

  • C:\work\mozc\src\out_win\Release\mozc_ja.ime

Finally, you must run mozc_broker32.exe with administrator privilege to register IME module as follows.

"%ProgramFiles%\Mozc\mozc_broker32.exe" --mode=register_ime

Register Mozc for TSF into 32-bit environment

Following file must be placed under %ProgramFiles%\Mozc.

  • C:\work\mozc\src\out_win\Release\mozc_ja_tip32.dll

Finally, you must run regsvr32 with administrator privilege to register IME module as follows.

regsvr32 "%ProgramFiles%\Mozc\mozc_ja_tip32.dll"

Uninstall Mozc (32-bit)

Unregister Mozc for IMM32 from 32-bit environment

Run mozc_broker32.exe with administrator privilege to unregister IME module as follows.

"%ProgramFiles%\Mozc\mozc_broker32.exe" --mode=unregister_ime

Then delete the following file.

  • %windir%\System32\mozc_ja.ime

Unregister Mozc for TSF from 32-bit environment

Run regsvr32 with administrator privilege to unregister IME module as follows.

regsvr32 /u "%ProgramFiles%\Mozc\mozc_ja_tip32.dll"

Uninstall common files of Mozc from 32-bit environment

Delete following directory and files after unregistering Mozc from IMM32/TSF.

  • %ProgramFiles%\Mozc\

Install Mozc (64-bit)

Following files must be placed under %ProgramFiles(x86)%\Mozc.

  • C:\work\mozc\src\out_win\Release\mozc_broker32.exe
  • C:\work\mozc\src\out_win\Release\mozc_cache_service.exe
  • C:\work\mozc\src\out_win\Release\mozc_renderer.exe
  • C:\work\mozc\src\out_win\Release\mozc_server.exe
  • C:\work\mozc\src\out_win\Release\mozc_tool.exe (if you specified --noqt option)
  • C:\work\mozc\src\out_win\ReleaseDynamic\mozc\_tool.exe (if you didn't specify --noqt option)
  • C:\work\mozc\src\out_win\ReleaseDynamic\Qt5Core.dll (not required if you specified --noqt option)
  • C:\work\mozc\src\out_win\ReleaseDynamic\Qt5Gui.dll (not required if you specified --noqt option)
  • C:\work\mozc\src\out_win\ReleaseDynamic\Qt5Widgets.dll (not required if you specified --noqt option)
  • C:\work\mozc\src\out_win\ReleaseDynamic\platforms\qwindows.dll (not required if you specified --noqt option)
  • C:\work\mozc\src\out_win\Release_x64\mozc_broker64.exe

Qt5Core.dll, Qt5Gui.dll, Qt5Widgets.dll, and qwindows.dll are not required if you specified --noqt option into the gyp command.

Register Mozc for IMM32 into 64-bit environment

Following files must be placed under %windir%\System32.

  • C:\work\mozc\src\out_win\Release_x64\mozc_ja.ime

Following files must be placed under %windir%\SysWOW64.

  • C:\work\mozc\src\out_win\Release\mozc_ja.ime

Finally, you must run mozc_broker64.exe with administrator privilege to register IME module as follows.

"%ProgramFiles(x86)%\Mozc\mozc_broker64.exe" --mode=register_ime

Register Mozc for TSF into 64-bit environment

Following file must be placed under %ProgramFiles(x86)%\Mozc.

  • C:\work\mozc\src\out_win\Release\mozc_ja_tip32.dll
  • C:\work\mozc\src\out_win\Release_x64\mozc_ja_tip64.dll

Finally, you must run regsvr32 with administrator privilege to register IME module as follows.

regsvr32 "%ProgramFiles(x86)%\Mozc\mozc_ja_tip32.dll"
regsvr32 "%ProgramFiles(x86)%\Mozc\mozc_ja_tip64.dll"

Uninstall Mozc (64-bit)

Unregister Mozc for IMM32 from 64-bit environment

Run mozc_broker64.exe with administrator privilege to unregister IME module as follows.

"%ProgramFiles(x86)%\Mozc\mozc_broker64.exe" --mode=unregister_ime

Then delete the following files.

  • %windir%\System32\mozc_ja.ime
  • %windir%\SysWOW64\mozc_ja.ime

Unregister Mozc for TSF from 64-bit environment

Run regsvr32 with administrator privilege to unregister IME module as follows.

regsvr32 /u "%ProgramFiles(x86)%\Mozc\mozc_ja_tip32.dll"
regsvr32 /u "%ProgramFiles(x86)%\Mozc\mozc_ja_tip64.dll"

Uninstall common files of Mozc from 64-bit environment

Delete following directory and files after unregistering Mozc from IMM32/TSF.

  • %ProgramFiles(x86)%\Mozc\

Run unit tests

You can run unit tests as follows.

cd C:\work\mozc\src
python build_mozc.py gyp --noqt
python build_mozc.py runtests -c Release

Note that you can specify --qtdir= option instead of --noqt in GYP phase since currently there is no unit test that depends on Qt.