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How to build Mozc in Windows

System Requirements

64-bit Windows is required to build Mozc for Windows. Mozc itself is expected to work on Windows 7 and later, including 32-bit Windows.

Software Requirements

Building Mozc on Windows requires the following software.

  • Visual Studio 2015 Community Edition, or any greater edition.
  • (optinal) Qt 5
    • Commercial version and LGPL version are available.
    • You must download msvs2015 32-bit version of Qt 5 since currently mozc_tool.exe needs to be built as a 32-bit executable.

Get dependent prebuilt binaries

If you do not have git, python3, and ninja in your build environment, you can use prebuilt binaries in depot_tools. You need to manually unzip depot_tools.zip and add the extracted directory into your PATH.

set PATH=%PATH%;c:\work\depot_tools

Then run gclient command twice so that dependent libraries can be installed automatically.

gclient
gclient

Install python3 dependencies

python3 -m pip install six

Get the Code

You can download Mozc source code as follows:

mkdir c:\work
cd c:\work
git clone -c core.autocrlf=false https://github.com/google/mozc.git -b master --single-branch --recursive

Compilation

First, you'll need to generate Visual C++ project files using a tool called GYP.

cd c:\work\mozc\src
python build_mozc.py gyp --qtdir=c:\Qt\Qt5.6.2\5.6\msvc2015

The directory of Qt (c:\Qt\Qt5.6.2\5.6\msvc2015 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.

You can also specify --branding=GoogleJapaneseInput option and --wix_dir=<dir to WiX binaries> option here to reproduce official Google Japanese Input binaries and installers.

Then, build Mozc binaries:

python build_mozc.py build -c Release package

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

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

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