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# Building Slic3r PE on Microsoft Windows
The currently supported way of building Slic3r PE on Windows is with CMake and MS Visual Studio 2013.
You can use the free [Visual Studio 2013 Community Edition](https://www.visualstudio.com/vs/older-downloads/).
CMake installer can be downloaded from [the official website](https://cmake.org/download/).
Building with newer versions of MSVS (2015, 2017) may work too as reported by some of our users.
_Note:_ Thanks to [**@supermerill**](https://github.com/supermerill) for testing and inspiration on this guide.
### Dependencies
On Windows Slic3r is built against statically built libraries.
We provide a prebuilt package of all the needed dependencies.
The package comes in a several variants:
- [64 bit, Release mode only](https://bintray.com/vojtechkral/Slic3r-PE/download_file?file_path=destdir-64.7z) (41 MB, 578 MB unpacked)
- [64 bit, Release and Debug mode](https://bintray.com/vojtechkral/Slic3r-PE/download_file?file_path=destdir-64-dev.7z) (88 MB, 1.3 GB unpacked)
- [32 bit, Release mode only](https://bintray.com/vojtechkral/Slic3r-PE/download_file?file_path=destdir-32.7z) (38 MB, 520 MB unpacked)
- [32 bit, Release and Debug mode](https://bintray.com/vojtechkral/Slic3r-PE/download_file?file_path=destdir-32-dev.7z) (74 MB, 1.1 GB unpacked)
When unsure, use the _Release mode only_ variant, the _Release and Debug_ variant is only needed for debugging & developement.
If you're unsure where to unpack the package, unpack it into `C:\local\` (but it can really be anywhere).
Alternatively you can also compile the dependencies yourself, see below.
### Building Slic3r PE with Visual Studio
First obtain the Slic3 PE sources via either git or by extracting the source archive.
Then you will need to note down the so-called 'prefix path' to the dependencies, this is the location of the dependencies packages + `\usr\local` appended.
For example on 64 bits this would be `C:\local\destdir-64\usr\local`. The prefix path will need to be passed to CMake.
When ready, open the relevant Visual Studio command line and `cd` into the directory with Slic3r sources.
Use these commands to prepare Visual Studio solution file:
mkdir build
cd build
cmake .. -G "Visual Studio 12 Win64" -DCMAKE_PREFIX_PATH="<insert prefix path here>"
Note that if you're building a 32-bit variant, you will need to change the `"Visual Studio 12 Win64"` to just `"Visual Studio 12"`.
Conversely, if you're using Visual Studio version other than 2013, the version number will need to be changed accordingly.
If `cmake` has finished without errors, go to the build directory and open the `Slic3r.sln` solution file in Visual Studio.
Before building, make sure you're building the right project (use one of those starting with `slic3r_app_...`) and that you're building
with the right configuration, ie. _Release_ vs. _Debug_. When unsure, choose _Release_.
Note that you won't be able to build a _Debug_ variant against a _Release_-only dependencies package.
#### Installing using the `INSTALL` project
Slic3r PE can be run from the Visual Studio or from Visual Studio's build directory (`src\Release` or `src\Debug`),
but for longer-term usage you migth want to install somewhere using the `INSTALL` project.
By default, this installs into `C:\Program Files\Slic3r`.
To customize the install path, use the `-DCMAKE_INSTALL_PREFIX=<path of your choice>` when invoking `cmake`.
### Building from the command line
There are several options for building from the command line:
- [msbuild](https://docs.microsoft.com/en-us/visualstudio/msbuild/msbuild-reference?view=vs-2017&viewFallbackFrom=vs-2013)
- [Ninja](https://ninja-build.org/)
- [nmake](https://docs.microsoft.com/en-us/cpp/build/nmake-reference?view=vs-2017)
To build with msbuild, use the same CMake command as in previous paragraph and then build using
msbuild /P:Configuration=Release ALL_BUILD.vcxproj
To build with Ninja or nmake, replace the `-G` option in the CMake call with `-G Ninja` or `-G "NMake Makefiles"` , respectively.
Then use either `ninja` or `nmake` to start the build.
To install, use `msbuild /P:Configuration=Release INSTALL.vcxproj` , `ninja install` , or `nmake install` .
### Building the dependencies package yourself
The dependencies package is built using CMake scripts inside the `deps` subdirectory of Slic3r PE sources.
(This is intentionally not interconnected with the CMake scripts in the rest of the sources.)
Open the preferred Visual Studio command line (64 or 32 bit variant) and `cd` into the directory with Slic3r sources.
Then `cd` into the `deps` directory and use these commands to build:
mkdir build
cd build
cmake .. -G "Visual Studio 12 Win64" -DDESTDIR="C:\local\destdir-custom"
msbuild ALL_BUILD.vcxproj
You can also use the Visual Studio GUI or other generators as mentioned above.
The `DESTDIR` option is the location where the bundle will be installed.
This may be customized. If you leave it empty, the `DESTDIR` will be places inside the same `build` directory.
Note that the build variant that you may choose using Visual Studio (ie. _Release_ or _Debug_ etc.) when building the dependency package is **not relevant**.
The dependency build will by default build _both_ the _Release_ and _Debug_ variants regardless of what you choose in Visual Studio.
You can disable building of the debug variant by passing the `-DDEP_DEBUG=OFF` option to CMake, this will only produce a _Release_ build.
Refer to the CMake scripts inside the `deps` directory to see which dependencies are built in what versions and how this is done.
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