Add tests for PoCL with and without using icd

pkgs/pocl/default.nix

@@ -13,6 +13,7 @@
   libxml2, # required for statically linked llvm
   python3,
   writableTmpDirAsHomeHook,
+  writeText,
 
   fetchFromGitHub,
 
@@ -194,22 +195,20 @@ stdenv.mkDerivation (finalAttrs: {
     runHook postInstallCheck
   '';
 
-  setupHook = ./setup-hook.sh;
+  setupHook = lib.optionalDrvAttr enableICD (
+    writeText "setup-hook" ''
+      addToSearchPath OCL_ICD_VENDORS @out@/etc/OpenCL/vendors
+    ''
+  );
 
   passthru = {
     updateScript = nix-update-script { };
     git = finalAttrs.finalPackage.override { useGit = true; };
     test = finalAttrs.finalPackage.overrideAttrs { doCheck = true; };
+    withICD = enableICD;
   };
 
-  requiredSystemFeatures = lib.optionals (finalAttrs.finalPackage.doCheck && enableHWLOC) [
-    "sys-devices"
-  ];
-
-  preCheck = ''
-    export POCL_DEBUG=error,warn
-    export NIX_DEBUG=1
-  '';
+  env.HWLOC_SYNTHETIC = lib.optionalDrvAttr enableHWLOC "node:1 core:1 pu:1";
 
   propagatedBuildInputs = [ stdenv.cc.cc ];
 

pkgs/pocl/setup-hook.sh

@@ -1,6 +0,0 @@
-preCheckHooks+=('setupPoclCheck')
-preInstallCheckHooks+=('setupPoclCheck')
-
-setupPoclCheck () {
-  export OCL_ICD_VENDORS="@out@/etc/OpenCL/vendors"
-}