Update building instructions

Author: GRAnimated

docs/BUILDING.md

@@ -8,21 +8,31 @@ The instructions below assume you're running a form of Linux (WSL or native).
 * Python 3.6 or newer with [pip](https://pip.pypa.io/en/stable/installation/)
 * Ninja
 * CMake 3.13+
-    * If you are on Ubuntu 18.04, you must first [update CMake by using the official CMake APT repository](https://apt.kitware.com/).
+    * If you are on Ubuntu 18.04, you must
+      first [update CMake by using the official CMake APT repository](https://apt.kitware.com/).
 * ccache (to speed up builds)
-* xdelta3
-* clang (for compiling Rust tools)
+* llvm-objdump
 
 Ubuntu users can install those dependencies by running:
 
 ```shell
-sudo apt install python3 ninja-build cmake ccache xdelta3 clang libssl-dev libncurses5
+sudo apt install python3 ninja-build cmake ccache libssl-dev libncurses5 llvm
 ```
 
+If you are running Ubuntu 23.10 or later, the `libncurses5` package won't be available anymore. You can install it from
+the archive using:
+
+```shell
+wget http://archive.ubuntu.com/ubuntu/pool/universe/n/ncurses/libtinfo5_6.3-2_amd64.deb && sudo dpkg -i libtinfo5_6.3-2_amd64.deb && rm -f libtinfo5_6.3-2_amd64.deb
+```
+
+For other systems, please check for the corresponding `libncurses5` backport, for
+example [ncurses5-compat-libs](https://aur.archlinux.org/packages/ncurses5-compat-libs) for Arch-based distributions.
+
 Additionally, you'll also need:
 
 * A Rust toolchain ([follow the instructions here](https://www.rust-lang.org/tools/install))
-* The following Python modules: `capstone colorama cxxfilt pyelftools ansiwrap watchdog python-Levenshtein toml` (install them with `pip install ...`)
+* The following Python modules: `pip install capstone colorama cxxfilt pyelftools ansiwrap watchdog python-Levenshtein toml`
 
 ## 2. Set up the project
 
@@ -37,6 +47,7 @@ Additionally, you'll also need:
         * install tools/check to check for differences in decompiled code
         * convert the executable if necessary
         * set up [Clang 4.0.1](https://releases.llvm.org/download.html#4.0.1) by downloading it from the official LLVM website
+        * patch Clang to match Nintendo's changes
         * create a build directory in `build/`
     * If something goes wrong, follow the instructions given to you by the script.
     * If you wish to use a CMake generator that isn't Ninja, use `--cmake_backend` to specify it.
@@ -46,13 +57,15 @@ Additionally, you'll also need:
 To start the build, just run
 
 ```shell
-ninja -C build
+python3 tools/build.py
 ```
 
 By default, a multithreaded build is performed.
 
 To check whether everything built correctly, just run `tools/check` after the build completes.
 
+You can check the current progress with `python3 tools/common/progress.py`.
+
 ## 4. Decompilers
 
-For instructions on setting up a decompiler, see [DECOMPILERS.md](DECOMPILERS.md).
+For instructions on setting up a decompiler, see [DECOMPILERS.md](DECOMPILERS.md).