linuxPackages.nvidia_x11: refactor, build more from source

* Use libglvnd;
* Compile nvidia-settings, nvidia-persistenced from source;
* Generalize builder.

pkgs/tools/X11/primus/default.nix

@@ -5,6 +5,8 @@
 # Other distributions do the same.
 { stdenv
 , stdenv_i686
+, lib
+, bumblebee
 , primusLib
 , writeScriptBin
 , primusLib_i686 ? null
@@ -18,7 +20,7 @@ let
 
   primus = if useNvidia then primusLib_ else primusLib_.override { nvidia_x11 = null; };
   primus_i686 = if useNvidia then primusLib_i686_ else primusLib_i686_.override { nvidia_x11 = null; };
-  ldPath = stdenv.lib.makeLibraryPath ([primus] ++ stdenv.lib.optional (primusLib_i686 != null) primus_i686);
+  ldPath = lib.makeLibraryPath ([ primus primus.glvnd ] ++ lib.optionals (primusLib_i686 != null) [ primus_i686 primus_i686.glvnd ]);
 
 in writeScriptBin "primusrun" ''
   #!${stdenv.shell}

pkgs/tools/X11/primus/lib.nix

@@ -1,10 +1,16 @@
 { stdenv, fetchFromGitHub
-, xlibsWrapper, mesa
+, libX11, mesa_noglu
 , nvidia_x11 ? null
-, libX11
+, libglvnd
 }:
 
-stdenv.mkDerivation {
+let
+  aPackage =
+    if nvidia_x11 == null then mesa_noglu
+    else if nvidia_x11.useGLVND then libglvnd
+    else nvidia_x11;
+
+in stdenv.mkDerivation {
   name = "primus-lib-2015-04-28";
 
   src = fetchFromGitHub {
@@ -14,18 +20,20 @@ stdenv.mkDerivation {
     sha256 = "118jm57ccawskb8vjq3a9dpa2gh72nxzvx2zk7zknpy0arrdznj1";
   };
 
-  buildInputs = [ libX11 mesa ];
+  buildInputs = [ libX11 mesa_noglu ];
 
   makeFlags = [ "LIBDIR=$(out)/lib"
-                "PRIMUS_libGLa=${if nvidia_x11 == null then mesa else nvidia_x11}/lib/libGL.so"
-                "PRIMUS_libGLd=${mesa}/lib/libGL.so"
-                "PRIMUS_LOAD_GLOBAL=${mesa}/lib/libglapi.so"
+                "PRIMUS_libGLa=${aPackage}/lib/libGL.so"
+                "PRIMUS_libGLd=${mesa_noglu}/lib/libGL.so"
+                "PRIMUS_LOAD_GLOBAL=${mesa_noglu}/lib/libglapi.so"
               ];
 
   installPhase = ''
     ln -s $out/lib/libGL.so.1 $out/lib/libGL.so
   '';
 
+  passthru.glvnd = if nvidia_x11 != null && nvidia_x11.useGLVND then nvidia_x11 else null;
+
   meta = with stdenv.lib; {
     description = "Low-overhead client-side GPU offloading";
     homepage = "https://github.com/amonakov/primus";