cemu: add link-time-compile-gen, build with gcc9stdenv

pkgs/applications/science/math/cemu/default.nix

@@ -1,6 +1,5 @@
 { fetchFromGitHub
 , lib
-, mkDerivation
 , SDL2
 , libGL
 , libarchive
@@ -10,9 +9,11 @@
 , git
 , libpng_apng
 , pkg-config
+, wrapQtAppsHook
+, stdenv
 }:
 
-mkDerivation rec {
+stdenv.mkDerivation rec {
   pname = "CEmu";
   version = "1.3";
   src = fetchFromGitHub {
@@ -26,6 +27,7 @@ mkDerivation rec {
   nativeBuildInputs = [
     qmake
     git
+    wrapQtAppsHook
     pkg-config
   ];
 
@@ -40,6 +42,7 @@ mkDerivation rec {
 
   qmakeFlags = [
     "gui/qt"
+    "CONFIG+=ltcg"
   ];
 
   meta = with lib; {

pkgs/top-level/all-packages.nix

@@ -3872,7 +3872,9 @@ with pkgs;
     inherit (darwin.apple_sdk.frameworks) Carbon IOKit;
   };
 
-  cemu = qt5.callPackage ../applications/science/math/cemu { };
+  cemu = qt5.callPackage ../applications/science/math/cemu {
+    stdenv = gcc9Stdenv;
+  };
 
   isolyzer = callPackage ../tools/cd-dvd/isolyzer { };