llvmPackages_rocm.llvm: build on big-parallel

All other LLVM packages run on big-parallel, so we should be
consistent when building the ROCm fork.

pkgs/development/compilers/llvm/rocm/default.nix

@@ -29,6 +29,7 @@ let
   # Stage 1
   # Base
   llvm = callPackage ./llvm.nix {
+    requiredSystemFeatures = [ "big-parallel" ];
     isBroken = stdenv.isAarch64; # https://github.com/RadeonOpenCompute/ROCm/issues/1831#issuecomment-1278205344
   };
 

pkgs/development/compilers/llvm/rocm/llvm.nix

@@ -39,6 +39,7 @@
   )
 )]
 , extraPostInstall ? ""
+, requiredSystemFeatures ? [ ]
 , extraLicenses ? [ ]
 , isBroken ? false
 }:
@@ -158,6 +159,8 @@ in stdenv.mkDerivation (finalAttrs: {
     };
   };
 
+  inherit requiredSystemFeatures;
+
   meta = with lib; {
     description = "ROCm fork of the LLVM compiler infrastructure";
     homepage = "https://github.com/RadeonOpenCompute/llvm-project";