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| ''emerge'' is a tool to build the KDE sources and its third-party requirements on MS Windows. It is the '''easy''' way to build KDE on MS Windows.
| | #REDIRECT [[Get_Involved/development/Windows]] |
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| == Setting up emerge ==
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| === Setting up a compiler ===
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| Currently emerge supports both the MinGW and Microsoft Visual Studio (msvc) compiler.
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| While MinGW is can be installed by emerge, [https://www.visualstudio.com/ Visual Studio] must be installed independently by the user.
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| === Direct X SDK ===
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| In order to compile the Qt5 ''qtbase'' package with MinGW you will also need to install the [https://www.microsoft.com/en-us/download/details.aspx?id=6812 Microsoft DirectX SDK], make sure to open a new command line window after the installation.
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| === Installing Craft===
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| * Start a powershell environment as administrator.
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| * Allow execution of powershell scripts.
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| Set-ExecutionPolicy RemoteSigned
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| * Exit the administrator powershell instance.
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| * Start a powershell environment as a user.
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| * Install emerge and folow the instructions
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| iex ((new-object net.webclient).DownloadString('https://raw.githubusercontent.com/KDE/craft/master/setup/install_craft.ps1'))
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| == Using emerge ==
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| To use emerge you need to start a Powershell window, point that to <tt>KDEROOT\emerge</tt> and run the initalization script. For example:
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| C:\KDEROOT\emerge\kdeenv.ps1
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| This tells emerge about your environment settings (e.g. paths). It will load your configuration from <tt>KDEROOT\etc\kdesettings.ini</tt>. If there are any error messages emerge will not work as expected. The output should look similar to this one (of course with your paths):
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| PS C:\kderoot\emerge>.\kdeenv.ps1
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| KDEROOT : C:\kderoot\emerge
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| KDECOMPILER : msvc2015
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| KDESVNDIR : C:\kderoot\download\svn
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| KDEGITDIR : C:\kderoot\download\git
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| DOWNLOADDIR : C:\kderoot\download
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| PYTHONPATH : C:\kderoot\python
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| PS C:\kderoot\emerge>
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| === Common emerge commands ===
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| * '''Installing a package and its dependencies''': Simply run <syntaxhighlight lang="text">emerge packagename</syntaxhighlight>
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| * '''Updating an installed package''': Once you have ''packagename'' built, type <syntaxhighlight lang="text">emerge -i packagename</syntaxhighlight> to update <tt>packagename</tt>.
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| == Troubleshooting ==
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| If a package fails to build, you'll be greeted with something like:
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| ...
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| emerge warning: while running make cmd: jom
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| emerge warning: Action: compile for libs/qt5/qtbase FAILED
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| *** Emerge all failed: all of libs/qtbase failed after 0:07:25 ***
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| emerge error: fatal error: package libs/qtbase all failed
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| In order to figure out ''what'' failed, grep the command line output ''above'' for errors.
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| If the log output is too long, you can also pipe the output to a file and then open the file inside an editor.
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| emerge qt > log 2>&1
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| notepad++ log
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| Grep for "error", or "error:" in the file.
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