zig/README.md

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![ZIG](https://ziglang.org/zig-logo.svg)
Zig is an open-source programming language designed for **robustness**,
**optimality**, and **maintainability**.
## Resources
* [Introduction](https://ziglang.org/#Introduction)
* [Download & Documentation](https://ziglang.org/download)
* [Community](https://github.com/ziglang/zig/wiki/Community)
* [Contributing](https://github.com/ziglang/zig/blob/master/CONTRIBUTING.md)
* [Frequently Asked Questions](https://github.com/ziglang/zig/wiki/FAQ)
## Building from Source
[![Build Status](https://dev.azure.com/ziglang/zig/_apis/build/status/ziglang.zig?branchName=master)](https://dev.azure.com/ziglang/zig/_build/latest?definitionId=1&branchName=master)
Note that you can
[download a binary of master branch](https://ziglang.org/download/#release-master).
### Stage 1: Build Zig from C++ Source Code
#### Dependencies
##### POSIX
* cmake >= 2.8.5
* gcc >= 5.0.0 or clang >= 3.6.0
* LLVM, Clang, LLD development libraries == 8.x, compiled with the same gcc or clang version above
- Use the system package manager, or [build from source](https://github.com/ziglang/zig/wiki/How-to-build-LLVM,-libclang,-and-liblld-from-source#posix).
##### Windows
* cmake >= 2.8.5
* Microsoft Visual Studio 2017 (version 15.8)
* LLVM, Clang, LLD development libraries == 8.x, compiled with the same MSVC version above
- Use the [pre-built binaries](https://github.com/ziglang/zig/wiki/How-to-build-LLVM,-libclang,-and-liblld-from-source#pre-built-binaries) or [build from source](https://github.com/ziglang/zig/wiki/How-to-build-LLVM,-libclang,-and-liblld-from-source#windows).
#### Instructions
##### POSIX
```
mkdir build
cd build
cmake ..
make install
```
##### MacOS
```
brew install cmake llvm@8
brew outdated llvm@8 || brew upgrade llvm@8
mkdir build
cd build
cmake .. -DCMAKE_PREFIX_PATH=/usr/local/Cellar/llvm/8.0.0_1
make install
```
##### Windows
See https://github.com/ziglang/zig/wiki/Building-Zig-on-Windows
### Stage 2: Build Self-Hosted Zig from Zig Source Code
*Note: Stage 2 compiler is not complete. Beta users of Zig should use the
Stage 1 compiler for now.*
Dependencies are the same as Stage 1, except now you can use stage 1 to compile
Zig code.
```
bin/zig build --prefix $(pwd)/stage2
```
This produces `./stage2/bin/zig` which can be used for testing and development.
Once it is feature complete, it will be used to build stage 3 - the final compiler
binary.
### Stage 3: Rebuild Self-Hosted Zig Using the Self-Hosted Compiler
*Note: Stage 2 compiler is not yet able to build Stage 3. Building Stage 3 is
not yet supported.*
Once the self-hosted compiler can build itself, this will be the actual
compiler binary that we will install to the system. Until then, users should
use stage 1.
#### Debug / Development Build
```
./stage2/bin/zig build --prefix $(pwd)/stage3
```
#### Release / Install Build
```
./stage2/bin/zig build install -Drelease
```