pi documentation update

Author: barbudreadmon

README-PI.md

@@ -1,5 +1,9 @@
 # FinalBurn Neo for Raspberry Pi
 
+## Important notice
+This port is meant for usage with the old closed-source gpu driver, which has been deprecated since 2019. Anybody using the modern open-source mesa driver should be using the [sdl2 port](README-SDL.md) instead.
+Either way, this port is outdated, unmaintained and currently fails building, so anybody wanting to use this nonetheless will have to fix it first.
+
 ## Compiling
 To compile the emulator, run `make pi`. You will need SDL 1.2 libraries for
 sound and input:

README.md

@@ -14,8 +14,6 @@ You can download the latest builds by clicking on the badge below. Please note t
 
 # Ports
 
-Raspberry Pi [build instructions](README-PI.md).
-
 macOS [build instructions](README-macOS.md) and [releases](https://github.com/fbn-mac/FBNeo/releases).
 
 [LibRetro port](https://github.com/libretro/FBNeo) with builds availble via [RetroArch](https://www.retroarch.com/) for a lot of cool platforms.
@@ -24,6 +22,8 @@ For SDL1.2 builds just type `make sdl` (requires SDL1.2 and GCC, make, perl and
 
 For SDL2 builds just type `make sdl2` (requires SDL2, SDL2_image, gcc, make, perl and nasm) [instructions](README-SDL.md)
 
+~~Raspberry Pi [build instructions](README-PI.md).~~
+
 # Reporting Issues
 
 Please raise an issue on the [project GitHub](https://github.com/finalburnneo/FBNeo/issues) or report on the forums at [Neosource](https://neo-source.com)