From 13beb432fb21fb5bea38ac374df0fbace92eec76 Mon Sep 17 00:00:00 2001
From: Sebastian Neubauer <sebastian.neubauer@amd.com>
Date: Tue, 21 Jul 2020 16:58:30 +0200
Subject: [PATCH] amdvlk: Add i686-linux platform

---
 pkgs/development/libraries/amdvlk/default.nix | 25 ++++++++++++++-----
 pkgs/top-level/all-packages.nix               |  1 +
 2 files changed, 20 insertions(+), 6 deletions(-)

diff --git a/pkgs/development/libraries/amdvlk/default.nix b/pkgs/development/libraries/amdvlk/default.nix
index 73983dba0508..2480a2707f9c 100644
--- a/pkgs/development/libraries/amdvlk/default.nix
+++ b/pkgs/development/libraries/amdvlk/default.nix
@@ -15,8 +15,11 @@
 , xorg
 , zlib
 }:
+let
 
-stdenv.mkDerivation rec {
+  suffix = if stdenv.system == "x86_64-linux" then "64" else "32";
+
+in stdenv.mkDerivation rec {
   pname = "amdvlk";
   version = "2020.Q3.4";
 
@@ -62,14 +65,24 @@ stdenv.mkDerivation rec {
 
   cmakeDir = "../drivers/xgl";
 
+  # LTO is disabled in gcc for i686 as of #66528
+  cmakeFlags = stdenv.lib.optionals stdenv.is32bit ["-DXGL_ENABLE_LTO=OFF"];
+
+  postPatch = stdenv.lib.optionalString stdenv.is32bit ''
+    substituteInPlace drivers/pal/cmake/PalCompilerOptions.cmake \
+      --replace "pal_setup_gcc_ipo()" ""
+  '';
+
   installPhase = ''
-    install -Dm755 -t $out/lib icd/amdvlk64.so
-    install -Dm644 -t $out/share/vulkan/icd.d ../drivers/AMDVLK/json/Redhat/amd_icd64.json
+    install -Dm755 -t $out/lib icd/amdvlk${suffix}.so
+    install -Dm644 -t $out/share/vulkan/icd.d ../drivers/AMDVLK/json/Redhat/amd_icd${suffix}.json
 
-    substituteInPlace $out/share/vulkan/icd.d/amd_icd64.json --replace \
+    substituteInPlace $out/share/vulkan/icd.d/amd_icd${suffix}.json --replace \
       "/usr/lib64" "$out/lib"
+    substituteInPlace $out/share/vulkan/icd.d/amd_icd${suffix}.json --replace \
+      "/usr/lib" "$out/lib"
 
-    patchelf --set-rpath "$rpath" $out/lib/amdvlk64.so
+    patchelf --set-rpath "$rpath" $out/lib/amdvlk${suffix}.so
   '';
 
   # Keep the rpath, otherwise vulkaninfo and vkcube segfault
@@ -80,7 +93,7 @@ stdenv.mkDerivation rec {
     homepage = "https://github.com/GPUOpen-Drivers/AMDVLK";
     changelog = "https://github.com/GPUOpen-Drivers/AMDVLK/releases/tag/v-${version}";
     license = licenses.mit;
-    platforms = [ "x86_64-linux" ];
+    platforms = [ "x86_64-linux" "i686-linux" ];
     maintainers = with maintainers; [ danieldk Flakebi ];
   };
 }
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 4c9179f5c5d9..1b91dfd45534 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -12159,6 +12159,7 @@ in
   # Multi-arch "drivers" which we want to build for i686.
   driversi686Linux = recurseIntoAttrs {
     inherit (pkgsi686Linux)
+      amdvlk
       mesa
       vaapiIntel
       libvdpau-va-gl