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Put nix on top in BUILDING_FROM_SOURCE
Nix is the easiest way to build from source, it should be on top.
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# Building the Roc compiler from source
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## Installing LLVM, Zig, valgrind, and Python
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To build the compiler, you need these installed:
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* [Zig](https://ziglang.org/), see below for version
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* `libxkbcommon` - macOS seems to have it already; on Ubuntu or Debian you can get it with `apt-get install libxkbcommon-dev`
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* On Debian/Ubuntu `sudo apt-get install pkg-config`
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* LLVM, see below for version
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To run the test suite (via `cargo test`), you additionally need to install:
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* [`valgrind`](https://www.valgrind.org/) (needs special treatment to [install on macOS](https://stackoverflow.com/a/61359781)
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Alternatively, you can use `cargo test --no-fail-fast` or `cargo test -p specific_tests` to skip over the valgrind failures & tests.
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For debugging LLVM IR, we use [DebugIR](https://github.com/vaivaswatha/debugir). This dependency is only required to build with the `--debug` flag, and for normal developtment you should be fine without it.
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### libcxb libraries
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You may see an error like this during builds:
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```
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/usr/bin/ld: cannot find -lxcb-render
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/usr/bin/ld: cannot find -lxcb-shape
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/usr/bin/ld: cannot find -lxcb-xfixes
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```
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If so, you can fix it like so:
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```
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sudo apt-get install libxcb-render0-dev libxcb-shape0-dev libxcb-xfixes0-dev
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```
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### Zig
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**version: 0.8.0**
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For any OS, you can use [`zigup`](https://github.com/marler8997/zigup) to manage zig installations.
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If you prefer a package manager, you can try the following:
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- For MacOS, you can install with `brew install zig`
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- For, Ubuntu, you can use Snap, you can install with `snap install zig --classic --beta`
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- For other systems, checkout this [page](https://github.com/ziglang/zig/wiki/Install-Zig-from-a-Package-Manager)
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If you want to install it manually, you can also download Zig directly [here](https://ziglang.org/download/). Just make sure you download the right version, the bleeding edge master build is the first download link on this page.
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### LLVM
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**version: 12.0.x**
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For macOS, you can install LLVM 12 using `brew install llvm@12` and then adding
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`$(brew --prefix llvm@12)/bin` to your `PATH`. You can confirm this worked by
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running `llc --version` - it should mention "LLVM version 12.0.0" at the top.
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You may also need to manually specify a prefix env var like so:
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```
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export LLVM_SYS_120_PREFIX=/usr/local/opt/llvm@12
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```
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For Ubuntu and Debian:
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```
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sudo apt -y install lsb-release software-properties-common gnupg
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wget https://apt.llvm.org/llvm.sh
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chmod +x llvm.sh
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./llvm.sh 12
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```
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If you use this script, you'll need to add `clang` and `llvm-as` to your `PATH`.
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By default, the script installs them as `clang-12` and `llvm-as-12`,
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respectively. You can address this with symlinks like so:
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```
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sudo ln -s /usr/bin/clang-12 /usr/bin/clang
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```
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```
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sudo ln -s /usr/bin/llvm-as-12 /usr/bin/llvm-as
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````
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There are also alternative installation options at http://releases.llvm.org/download.html
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[Troubleshooting](#troubleshooting)
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### Building
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Use `cargo build` to build the whole project.
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Use `cargo run help` to see all subcommands.
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To use the `repl` subcommand, execute `cargo run repl`.
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## Using Nix
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### Install
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@ -168,6 +83,90 @@ Check the [nixGL repo](https://github.com/guibou/nixGL) for other graphics confi
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Create an issue if you run into problems not listed here.
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That will help us improve this document for everyone who reads it in the future!
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## Manual Install
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To build the compiler, you need these installed:
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* [Zig](https://ziglang.org/), see below for version
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* `libxkbcommon` - macOS seems to have it already; on Ubuntu or Debian you can get it with `apt-get install libxkbcommon-dev`
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* On Debian/Ubuntu `sudo apt-get install pkg-config`
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* LLVM, see below for version
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To run the test suite (via `cargo test`), you additionally need to install:
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* [`valgrind`](https://www.valgrind.org/) (needs special treatment to [install on macOS](https://stackoverflow.com/a/61359781)
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Alternatively, you can use `cargo test --no-fail-fast` or `cargo test -p specific_tests` to skip over the valgrind failures & tests.
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For debugging LLVM IR, we use [DebugIR](https://github.com/vaivaswatha/debugir). This dependency is only required to build with the `--debug` flag, and for normal developtment you should be fine without it.
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### libcxb libraries
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You may see an error like this during builds:
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```
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/usr/bin/ld: cannot find -lxcb-render
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/usr/bin/ld: cannot find -lxcb-shape
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/usr/bin/ld: cannot find -lxcb-xfixes
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```
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If so, you can fix it like so:
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```
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sudo apt-get install libxcb-render0-dev libxcb-shape0-dev libxcb-xfixes0-dev
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```
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### Zig
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**version: 0.8.0**
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For any OS, you can use [`zigup`](https://github.com/marler8997/zigup) to manage zig installations.
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If you prefer a package manager, you can try the following:
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- For MacOS, you can install with `brew install zig`
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- For, Ubuntu, you can use Snap, you can install with `snap install zig --classic --beta`
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- For other systems, checkout this [page](https://github.com/ziglang/zig/wiki/Install-Zig-from-a-Package-Manager)
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If you want to install it manually, you can also download Zig directly [here](https://ziglang.org/download/). Just make sure you download the right version, the bleeding edge master build is the first download link on this page.
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### LLVM
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**version: 12.0.x**
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For macOS, you can install LLVM 12 using `brew install llvm@12` and then adding
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`$(brew --prefix llvm@12)/bin` to your `PATH`. You can confirm this worked by
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running `llc --version` - it should mention "LLVM version 12.0.0" at the top.
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You may also need to manually specify a prefix env var like so:
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```
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export LLVM_SYS_120_PREFIX=/usr/local/opt/llvm@12
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```
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For Ubuntu and Debian:
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```
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sudo apt -y install lsb-release software-properties-common gnupg
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wget https://apt.llvm.org/llvm.sh
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chmod +x llvm.sh
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./llvm.sh 12
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```
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If you use this script, you'll need to add `clang` and `llvm-as` to your `PATH`.
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By default, the script installs them as `clang-12` and `llvm-as-12`,
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respectively. You can address this with symlinks like so:
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```
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sudo ln -s /usr/bin/clang-12 /usr/bin/clang
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```
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```
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sudo ln -s /usr/bin/llvm-as-12 /usr/bin/llvm-as
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````
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There are also alternative installation options at http://releases.llvm.org/download.html
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[Troubleshooting](#troubleshooting)
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### Building
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Use `cargo build` to build the whole project.
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Use `cargo run help` to see all subcommands.
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To use the `repl` subcommand, execute `cargo run repl`.
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### LLVM installation on Linux
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For a current list of all dependency versions and their names in apt, see the Earthfile.
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