electron/docs/development/build-instructions-linux.md

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# Build Instructions (Linux)
Follow the guidelines below for building Electron on Linux.
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## Prerequisites
* At least 25GB disk space and 8GB RAM.
* Python 2.7.x. Some distributions like CentOS still use Python 2.6.x
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so you may need to check your Python version with `python -V`.
* Node.js v0.12.x. There are various ways to install Node. You can download
source code from [Node.js](http://nodejs.org) and compile from source.
Doing so permits installing Node on your own home directory as a standard user.
Or try repositories such as [NodeSource](https://nodesource.com/blog/nodejs-v012-iojs-and-the-nodesource-linux-repositories).
* Clang 3.4 or later.
* Development headers of GTK+ and libnotify.
On Ubuntu, install the following libraries:
```bash
$ sudo apt-get install build-essential clang libdbus-1-dev libgtk2.0-dev \
libnotify-dev libgnome-keyring-dev libgconf2-dev \
libasound2-dev libcap-dev libcups2-dev libxtst-dev \
libxss1 libnss3-dev gcc-multilib g++-multilib curl
```
On Fedora, install the following libraries:
```bash
$ sudo yum install clang dbus-devel gtk2-devel libnotify-devel libgnome-keyring-devel \
xorg-x11-server-utils libcap-devel cups-devel libXtst-devel \
alsa-lib-devel libXrandr-devel GConf2-devel nss-devel
```
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Other distributions may offer similar packages for installation via package
managers such as pacman. Or one can compile from source code.
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## Getting the Code
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```bash
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$ git clone https://github.com/electron/electron.git
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```
## Bootstrapping
The bootstrap script will download all necessary build dependencies and create
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the build project files. You must have Python 2.7.x for the script to succeed.
Downloading certain files can take a long time. Notice that we are using
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`ninja` to build Electron so there is no `Makefile` generated.
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```bash
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$ cd electron
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$ ./script/bootstrap.py -v
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```
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### Cross compilation
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If you want to build for an `arm` target you should also install the following
dependencies:
```bash
$ sudo apt-get install libc6-dev-armhf-cross linux-libc-dev-armhf-cross \
g++-arm-linux-gnueabihf
```
And to cross compile for `arm` or `ia32` targets, you should pass the
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`--target_arch` parameter to the `bootstrap.py` script:
```bash
$ ./script/bootstrap.py -v --target_arch=arm
```
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## Building
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If you would like to build both `Release` and `Debug` targets:
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```bash
$ ./script/build.py
```
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This script will cause a very large Electron executable to be placed in
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the directory `out/R`. The file size is in excess of 1.3 gigabytes. This
happens because the Release target binary contains debugging symbols.
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To reduce the file size, run the `create-dist.py` script:
```bash
$ ./script/create-dist.py
```
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This will put a working distribution with much smaller file sizes in
the `dist` directory. After running the create-dist.py script, you
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may want to remove the 1.3+ gigabyte binary which is still in `out/R`.
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You can also build the `Debug` target only:
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```bash
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$ ./script/build.py -c D
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```
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After building is done, you can find the `electron` debug binary under `out/D`.
## Cleaning
To clean the build files:
```bash
$ ./script/clean.py
```
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## Troubleshooting
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### Error While Loading Shared Libraries: libtinfo.so.5
Prebulit `clang` will try to link to `libtinfo.so.5`. Depending on the host
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architecture, symlink to appropriate `libncurses`:
```bash
$ sudo ln -s /usr/lib/libncurses.so.5 /usr/lib/libtinfo.so.5
```
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## Tests
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Test your changes conform to the project coding style using:
```bash
$ npm run lint
```
Test functionality using:
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```bash
$ ./script/test.py
```
## Advanced topics
The default building configuration is targeted for major desktop Linux
distributions, to build for a specific distribution or device, following
information may help you.
### Build libchromiumcontent locally
To avoid using the prebuilt binaries of libchromiumcontent, you can pass the
`--build_libchromiumcontent` switch to `bootstrap.py` script:
```bash
$ ./script/bootstrap.py -v --build_libchromiumcontent
```
Note that by default the `shared_library` configuration is not built, so you can
only build `Release` version of Electron if you use this mode:
```bash
$ ./script/build.py -c D
```