fix minor bugs

Author: biohazduck

content/docs/guides/selfbuild/_index.md

@@ -7,7 +7,7 @@ description: >
 
 This page details how to build TinyGo from source. If you would like to install a pre-built binary release, please see our [quick install guide](../../../getting-started/install).
 
-A major dependency of TinyGo is [LLVM](https://llvm.org/). You can either use a version of LLVM already on your system or build LLVM manually. Building manually takes a long time (around an hour depending on how fast your system is) so it is recommended to use a version of LLVM already on your system if that's possible. The links provided above show how to install LLVM one way or the other.
+A major dependency of TinyGo is [LLVM](https://llvm.org/). You can either use a version of LLVM already on your system or build LLVM manually. Building manually takes a long time (around an hour depending on how fast your system is) so it is recommended to use a version of LLVM already on your system if that's possible. The links provided below show how to install LLVM one way or the other.
 
 ### Repository cloning (before build)
 Start with getting the source code. On Windows, you might want to install the [build dependencies](#build-dependencies) first.
@@ -29,4 +29,4 @@ Once the branch is selected, pull submodules:
 git submodule update --init
 ```
 
-Now you are ready to build TinyGo- but you must choose whether to build with a [manual LLVM install](./manual-llvm.md) or with a [system installed LLVM](./byollvm.md). See the links above.
+Now you are ready to build TinyGo- but you must choose whether to build with a [manual LLVM install](./manual-llvm) or with a [system installed LLVM](./byollvm). See the links below.

content/docs/guides/selfbuild/additional-requirements.md

@@ -0,0 +1,35 @@
+---
+title: "Additional requirements"
+weight: 4
+description: >
+  Build a development version of TinyGo from source if you want to help improve TinyGo or want to try the latest features.
+---
+
+We're not done yet. Some extra things need to be built before you can start using TinyGo.
+
+If you haven't already, you need to download llvm-project (for the compiler-rt sources that are needed for most architectures):
+
+```shell
+make llvm-source
+```
+
+To be able to use TinyGo on a bare-metal target, you need to generate some files first:
+
+```shell
+make gen-device
+```
+
+To be able to use TinyGo to build WebAssembly binaries, you will need to compile [wasi-libc](https://github.com/WebAssembly/wasi-libc) and [Binaryen](https://github.com/WebAssembly/binaryen):
+
+```shell
+make wasi-libc
+make binaryen
+```
+
+These command may need to be re-run after some updates in TinyGo.
+
+There are also some extra tools you will need to install, depending on your operating system. These tools are gcc-avr, avr-libc, avrdude, and openocd. Check the additional requirements for your operating system:
+
+  * [Linux](/getting-started/install/linux/)
+  * [MacOS](/getting-started/install/macos/)
+  * [Windows](/getting-started/install/windows/)

content/docs/guides/selfbuild/byollvm.md

@@ -1,11 +1,11 @@
 ---
 title: "Build with system-installed LLVM"
-weight: 4
+weight: 3
 description: >
   How to build TinyGo with a system-installed version of LLVM.
 ---
 
-⚠️ Halt! This is the system installed LLVM guide! Please check the following table and make sure you don't need the [manual LLVM install guide](./manual-llvm.md) instead! 
+⚠️ Halt! This is the system installed LLVM guide! Please check the following table and make sure you don't need the [manual LLVM install guide](./manual-llvm) instead! 
 
 
 | You need to build LLVM manually in the following cases |