Clang 15+ is required to build correctly.

Building-for-Linux.md

@@ -88,8 +88,9 @@ You'll need to download and install the following to build Citra:
     - Arch: `pacman -S base-devel`
     - Fedora: `dnf install gcc-c++`
     - OpenSUSE: `zypper in gcc-c++`
-  * [Clang](https://github.com/llvm-mirror/clang) 9.0+ 
-    - Deb: `apt install clang clang-format libc++-dev` (in some distros, clang-9.0).
+  * [Clang](https://github.com/llvm-mirror/clang) 15.0+
+    - Deb: `apt install clang clang-format libc++-dev`
+      - Note for Ubuntu users: Clang 15 is available only from 22.10 onward. For earlier distro versions, see: https://apt.llvm.org/
     - Arch: `pacman -S clang`, `libc++` is in the AUR. Use pacaur or yaourt to install it.
     - Fedora: `dnf install clang libcxx-devel`
     - OpenSUSE: `zypper in clang`
@@ -120,7 +121,6 @@ cmake ../
 cmake --build . -- -j"$(nproc)"
 sudo make install (optional)
 ```
-- To enable HLE AAC Decoding, use `cmake .. -DENABLE_FFMPEG_AUDIO_DECODER=ON` instead.
 
 Optionally, you can use "cmake -i .." to adjust various options (e.g. disable the Qt GUI).
 
@@ -136,6 +136,9 @@ cmake .. -DCMAKE_CXX_COMPILER=clang++-5.0 \
 	-DCMAKE_CXX_FLAGS="-O2 -g -stdlib=libc++"
 cmake --build . -- -j"$(nproc)"
 sudo make install (optional)
+
+If you get a weird compile error related to `std::span` conversions, make sure you are using clang and libc++ 15 or up. This is an issue with libc++ 14.
+
 ```
 
 ### Building Citra in Release Mode (Optimized):
@@ -147,7 +150,6 @@ cmake .. -DCMAKE_BUILD_TYPE=Release
 cmake --build . -- -j"$(nproc)"
 sudo make install (optional)
 ```
-- To enable HLE AAC Decoding, use `cmake .. -DCMAKE_BUILD_TYPE=Release -DENABLE_FFMPEG_AUDIO_DECODER=ON` instead.
 
 ### Building with debug symbols: