Add simple clinfo test for PoCL

.gitea/workflows/ci.yaml

@@ -12,9 +12,4 @@ jobs:
     runs-on: native
     steps:
       - uses: https://gitea.com/ScMi1/checkout@v1.4
-      - run: nix build -L --no-link --print-out-paths .#bsc.ci.all
-  build:cross:
-    runs-on: native
-    steps:
-      - uses: https://gitea.com/ScMi1/checkout@v1.4
-      - run: nix build -L --no-link --print-out-paths .#bsc.ci.cross
+      - run: nix build -L --no-link --print-out-paths .#bsc-ci.all

flake.nix

@@ -42,7 +42,9 @@ in
     # full nixpkgs with our overlay applied
     legacyPackages.${system} = pkgs;
 
-    hydraJobs = self.legacyPackages.${system}.bsc.hydraJobs;
+    hydraJobs = {
+      inherit (self.legacyPackages.${system}.bsc-ci) tests pkgs cross;
+    };
 
     # propagate nixpkgs lib, so we can do bscpkgs.lib
     inherit (nixpkgs) lib;

m/common/base.nix

@@ -11,7 +11,6 @@
     ./base/hw.nix
     ./base/net.nix
     ./base/nix.nix
-    ./base/sys-devices.nix
     ./base/ntp.nix
     ./base/rev.nix
     ./base/ssh.nix

m/common/base/sys-devices.nix

@@ -1,9 +0,0 @@
-{
-  nix.settings.system-features = [ "sys-devices" ];
-
-  programs.nix-required-mounts.enable = true;
-  programs.nix-required-mounts.allowedPatterns.sys-devices.paths = [
-    "/sys/devices/system/cpu"
-    "/sys/devices/system/node"
-  ];
-}

overlay.nix

@@ -47,6 +47,7 @@ let
     ovni = callPackage ./pkgs/ovni/default.nix { };
     ovniGit = final.ovni.override { useGit = true; };
     paraverKernel = callPackage ./pkgs/paraver/kernel.nix { };
+    pocl = callPackage ./pkgs/pocl/default.nix { };
     prometheus-slurm-exporter = prev.callPackage ./pkgs/slurm-exporter/default.nix { };
     #pscom = callPackage ./pkgs/parastation/pscom.nix { }; # Unmaintaned
     #psmpi = callPackage ./pkgs/parastation/psmpi.nix { }; # Unmaintaned
@@ -62,7 +63,7 @@ let
   };
 
   tests = rec {
-    hwloc = callPackage ./test/bugs/hwloc.nix { };
+    #hwloc = callPackage ./test/bugs/hwloc.nix { }; # Broken, no /sys
     #sigsegv = callPackage ./test/reproducers/sigsegv.nix { };
     hello-c = callPackage ./test/compilers/hello-c.nix { };
     hello-cpp = callPackage ./test/compilers/hello-cpp.nix { };
@@ -92,20 +93,16 @@ let
     clangNosvOmpv-ld = callPackage ./test/compilers/clang-openmp-ld.nix {
       stdenv = final.stdenvClangOmpss2NodesOmpv;
     };
+
+    pocl = callPackage ./test/compilers/pocl.nix { };
   };
 
-  # For now, only build toplevel packages in CI/Hydra
-  pkgsTopLevel = filterAttrs (_: isDerivation) bscPkgs;
+  pkgs = filterAttrs (_: isDerivation) bscPkgs;
 
-  # Native build in that platform doesn't imply cross build works
-  canCrossCompile = platform: pkg:
-    (isDerivation pkg) &&
-    # Must be defined explicitly
-    (pkg.meta.cross or false) &&
-    (meta.availableOn platform pkg);
-
-  # For now only RISC-V
-  crossSet = { riscv64 = final.pkgsCross.riscv64.bsc.pkgsTopLevel; };
+  crossTargets = [ "riscv64" ];
+  cross = prev.lib.genAttrs crossTargets (target:
+    final.pkgsCross.${target}.bsc-ci.pkgs
+  );
 
   buildList = name: paths:
     final.runCommandLocal name { } ''
@@ -119,31 +116,22 @@ let
       printf '%s\n' $deps >$out
     '';
 
-  pkgsList = buildList "ci-pkgs" (builtins.attrValues pkgsTopLevel);
-  testsList = buildList "ci-tests" (collect isDerivation tests);
-  allList = buildList' "ci-all" [ pkgsList testsList ];
-  # For now only RISC-V
-  crossList = buildList "ci-cross"
-    (filter
-      (canCrossCompile final.pkgsCross.riscv64.stdenv.hostPlatform)
-        (builtins.attrValues crossSet.riscv64));
+  crossList = builtins.mapAttrs (t: v: buildList t (builtins.attrValues v)) cross;
+
+  pkgsList = buildList "ci-pkgs" (builtins.attrValues pkgs);
+  testList = buildList "ci-tests" (collect isDerivation tests);
+
+  all = buildList' "ci-all" [ pkgsList testList ];
 
 in bscPkgs // {
-  # Prevent accidental usage of bsc-ci attribute
-  bsc-ci = throw "the bsc-ci attribute is deprecated, use bsc.ci";
+  # Prevent accidental usage of bsc attribute
+  bsc = throw "the bsc attribute is deprecated, packages are now in the root";
 
   # Internal for our CI tests
-  bsc = {
-    # CI targets for nix build
-    ci = { pkgs = pkgsList; tests = testsList; all = allList; cross = crossList; };
-
-    # Direct access to package sets
-    tests = tests;
-    pkgs = bscPkgs;
-    pkgsTopLevel = pkgsTopLevel;
-    cross = crossSet;
-
-    # Hydra uses attribute sets of pkgs
-    hydraJobs = { tests = tests; pkgs = pkgsTopLevel; cross = crossSet; };
+  bsc-ci = {
+    inherit pkgs pkgsList;
+    inherit tests testList;
+    inherit cross crossList;
+    inherit all;
   };
 }

pkgs/extrae/default.nix

@@ -20,7 +20,6 @@
 #, python3Packages
 , installShellFiles
 , symlinkJoin
-, enablePapi ? stdenv.hostPlatform == stdenv.buildPlatform # Disabled when cross-compiling
 }:
 
 let
@@ -88,7 +87,7 @@ stdenv.mkDerivation rec {
       --enable-sampling
       --with-unwind=${libunwind.dev}
       --with-xml-prefix=${libxml2.dev}
-      ${lib.optionalString enablePapi "--with-papi=${papi}"}
+      --with-papi=${papi}
       ${if (mpi != null) then ''--with-mpi=${mpi}''
         else ''--without-mpi''}
       --without-dyninst)

pkgs/lmbench/default.nix

@@ -35,8 +35,6 @@ stdenv.mkDerivation rec {
       CFLAGS=-Wno-implicit-int
       CPPFLAGS=-I${libtirpc.dev}/include/tirpc
       LDFLAGS=-ltirpc
-      CC=$CC
-      AR=$AR
     )
   '';
 

pkgs/nanos6/default.nix

@@ -16,7 +16,6 @@
 , jemallocNanos6 ? null
 , cachelineBytes ? 64
 , enableGlibcxxDebug ? false
-, enablePapi ? stdenv.hostPlatform == stdenv.buildPlatform # Disabled when cross-compiling
 , useGit ? false
 , gitUrl ? "ssh://git@bscpm04.bsc.es/nanos6/nanos6"
 , gitBranch ? "master"
@@ -48,8 +47,6 @@ let
   };
 
   source = if (useGit) then git else release;
-
-  isCross = stdenv.hostPlatform != stdenv.buildPlatform;
 in
   stdenv.mkDerivation (source // {
     pname = "nanos6";
@@ -74,13 +71,9 @@ in
       "--disable-all-instrumentations"
       "--enable-ovni-instrumentation"
       "--with-ovni=${ovni}"
-      "--with-boost=${boost.dev}"
     ] ++
       (optional enableJemalloc "--with-jemalloc=${jemallocNanos6}") ++
-      (optional enableGlibcxxDebug "CXXFLAGS=-D_GLIBCXX_DEBUG") ++
-      # Most nanos6 api symbols are resolved at runtime, so prefer
-      # ifunc by default
-      (optional isCross "--with-symbol-resolution=ifunc");
+      (optional enableGlibcxxDebug "CXXFLAGS=-D_GLIBCXX_DEBUG");
 
     postConfigure = lib.optionalString (!enableDebug) ''
       # Disable debug
@@ -104,14 +97,16 @@ in
       # TODO: papi_version is needed for configure:
       # ./configure: line 27378: papi_version: command not found
       # This probably breaks cross-compilation
-    ] ++ lib.optionals enablePapi [ papi ];
+      papi
+    ];
 
     buildInputs = [
       boost
       numactl
       hwloc
+      papi
       ovni
-    ] ++ lib.optionals enablePapi [ papi ];
+    ];
 
     # Create a script that sets NANOS6_HOME
     postInstall = ''

pkgs/nosv/default.nix

@@ -7,7 +7,7 @@
 , numactl
 , hwloc
 , papi
-, enablePapi ? stdenv.hostPlatform == stdenv.buildPlatform # Disabled when cross-compiling
+, enablePapi ? true
 , cacheline ? 64 # bits
 , ovni ? null
 , useGit ? false

pkgs/ovni/default.nix

@@ -55,7 +55,4 @@ in
     doCheck = true;
     checkTarget = "test";
     hardeningDisable = [ "all" ];
-    meta = {
-      cross = true;
-    };
   }

pkgs/pocl/0001-cmake-do-not-use-suffix.patch

@@ -0,0 +1,26 @@
+From ccf301659caac9b5e973ba1f2d32352acf617a98 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Aleix=20Bon=C3=A9?= <aleix.boneribo@bsc.es>
+Date: Tue, 2 Jul 2024 16:45:05 +0200
+Subject: [PATCH] cmake: do not use suffix
+
+---
+ cmake/LLVM.cmake                              |  3 ++
+ 1 files changed, 3 insertions(+)
+
+diff --git a/cmake/LLVM.cmake b/cmake/LLVM.cmake
+index f4dbda065..e29144dce 100644
+--- a/cmake/LLVM.cmake
++++ b/cmake/LLVM.cmake
+@@ -65,6 +65,9 @@ else()
+     message(WARNING "Cannot determine llvm binary suffix from ${LLVM_CONFIG}")
+   endif()
+   message(STATUS "LLVM binaries suffix : ${LLVM_BINARY_SUFFIX}")
++
++  # We don't want suffixes in nix
++  set(LLVM_BINARY_SUFFIX "")
+ endif()
+ 
+ get_filename_component(LLVM_CONFIG_LOCATION "${LLVM_CONFIG}" DIRECTORY)
+-- 
+2.45.1
+

pkgs/pocl/0001-cmake-native-build-tools.patch

@@ -0,0 +1,33 @@
+From f24b456c50f587b05cc8f2699c94d8cdefc5b13e Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Aleix=20Bon=C3=A9?= <aleix.boneribo@bsc.es>
+Date: Tue, 2 Jul 2024 17:11:11 +0200
+Subject: [PATCH] cmake: native build tools
+
+---
+ cmake/LLVM.cmake                    |   7 +-
+ 1 files changed, 6 insertions(+), 1 deletion(-)
+
+diff --git a/cmake/LLVM.cmake b/cmake/LLVM.cmake
+index e29144dce..b9f14ce6a 100644
+--- a/cmake/LLVM.cmake
++++ b/cmake/LLVM.cmake
+@@ -269,10 +269,15 @@ endforeach()
+ 
+ ####################################################################
+ 
++if(DEFINED LLVM_NATIVE_TOOL_DIR)
++  set(TOOL_DIR "${LLVM_NATIVE_TOOL_DIR}")
++  message(STATUS "TOOL_DIR=${TOOL_DIR}")
++endif()
++
+ macro(find_program_or_die OUTPUT_VAR PROG_NAME DOCSTRING)
+   find_program(${OUTPUT_VAR}
+     NAMES "${PROG_NAME}${LLVM_BINARY_SUFFIX}${CMAKE_EXECUTABLE_SUFFIX}"
+-    HINTS "${LLVM_BINDIR}" "${LLVM_CONFIG_LOCATION}"
++    HINTS "${TOOL_DIR}" "${LLVM_BINDIR}" "${LLVM_CONFIG_LOCATION}"
+     DOC "${DOCSTRING}"
+     NO_CMAKE_PATH
+     NO_CMAKE_ENVIRONMENT_PATH
+-- 
+2.45.1
+

pkgs/pocl/0001-cmake-use-clang-from-cmake-variable.patch

@@ -0,0 +1,48 @@
+From 4688b5ce895761c884ae15fc0234ed8d623b988b Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Aleix=20Bon=C3=A9?= <aleix.boneribo@bsc.es>
+Date: Tue, 2 Jul 2024 15:41:47 +0200
+Subject: [PATCH] cmake: use clang from cmake variable
+
+---
+ cmake/LLVM.cmake | 22 ++++++++++++++++++++--
+ 1 file changed, 20 insertions(+), 2 deletions(-)
+
+diff --git a/cmake/LLVM.cmake b/cmake/LLVM.cmake
+index 71b786dc7..f4dbda065 100644
+--- a/cmake/LLVM.cmake
++++ b/cmake/LLVM.cmake
+@@ -281,11 +281,29 @@ macro(find_program_or_die OUTPUT_VAR PROG_NAME DOCSTRING)
+   endif()
+ endmacro()
+ 
+-find_program_or_die( CLANG "clang" "clang binary")
++# -DCMAKE_C_COMPILER=riscv64-unknown-linux-gnu-clang -DCMAKE_CXX_COMPILER=riscv64-unknown-linux-gnu-clang++
++
++# if(DEFINED CLANG_EXECUTABLE)
++if(DEFINED CMAKE_C_COMPILER)
++  # set(CLANG "${CLANG_EXECUTABLE}")
++  set(CLANG "${CMAKE_C_COMPILER}")
++  message(STATUS "Using CLANG_EXECUTABLE: ${CLANG}")
++else()
++  find_program_or_die( CLANG "clang" "clang binary")
++endif()
+ execute_process(COMMAND "${CLANG}" "--version" OUTPUT_VARIABLE LLVM_CLANG_VERSION RESULT_VARIABLE CLANG_RES)
++
+ # TODO this should be optional
+-find_program_or_die( CLANGXX "clang++" "clang++ binary")
++# if(DEFINED CLANGXX_EXECUTABLE)
++if(DEFINED CMAKE_CXX_COMPILER)
++  # set(CLANGXX "${CLANGXX_EXECUTABLE}")
++  set(CLANGXX "${CMAKE_CXX_COMPILER}")
++  message(STATUS "Using CLANGXX_EXECUTABLE: ${CLANGXX}")
++else()
++  find_program_or_die( CLANGXX "clang++" "clang++ binary")
++endif()
+ execute_process(COMMAND "${CLANGXX}" "--version" OUTPUT_VARIABLE LLVM_CLANGXX_VERSION RESULT_VARIABLE CLANGXX_RES)
++
+ if(CLANGXX_RES OR CLANG_RES)
+   message(FATAL_ERROR "Failed running clang/clang++ --version")
+ endif()
+-- 
+2.45.1
+

pkgs/pocl/default.nix

@@ -0,0 +1,216 @@
+{ lib
+, llvmPackages
+, ninja
+, cmake
+, hwloc
+, ocl-icd
+, opencl-headers
+, getconf
+, pkg-config
+, spirv-llvm-translator
+, spirv-tools
+, libxml2  # required for statically linked llvm
+, python3
+, writableTmpDirAsHomeHook
+
+, fetchFromGitHub
+
+, useGit ? false
+, gitUrl ? "git@gitlab-internal.bsc.es:task-awareness/pocl/pocl.git"
+, gitBranch ? "new-device"
+, gitCommit ? "dd10c2221b31223cbb796182df6a07f11c7541f5"
+
+, staticLLVM ? true
+, enableICD ? true
+, enableSPIRV ? true
+, enableHWLOC ? true
+, enableRemoteServer ? false
+, enableRemoteClient ? false
+, enableDistroVariants ? false
+
+, lttng-ust
+, enableLTTNG ? false
+
+, tbb
+, enableTBB ? false
+
+, nosv ? null
+, ovni ? null
+, enableNOSV ? useGit
+, enableOVNI ? useGit
+
+, buildPackages
+, nix-update-script
+}:
+
+let
+
+  release = rec {
+    version = "7.0";
+    src = fetchFromGitHub {
+      owner = "pocl";
+      repo = "pocl";
+      tag = "v${version}";
+      hash = "sha256-pyolM0SR6xiwhad7K0mX9I/PKbIa8Ltin0CYoA1U/qo=";
+
+    };
+  };
+
+  git = rec {
+    version = src.shortRev;
+    src = builtins.fetchGit {
+      url = gitUrl;
+      ref = gitBranch;
+      rev = gitCommit;
+    };
+  };
+
+  source = if (useGit) then git else release;
+
+  stdenv = llvmPackages.stdenv;
+
+  buildLlvmPackages = buildPackages.llvmPackages;
+
+  isCross = stdenv.hostPlatform != stdenv.buildPlatform;
+
+  featureList = lib.concatStringsSep "+" (
+    (lib.optionals enableICD ["icd"]) ++
+    (lib.optionals enableNOSV ["nosv"]) ++
+    (lib.optionals enableOVNI ["ovni"]) ++
+    (lib.optionals enableSPIRV ["spirv"]) ++
+    (lib.optionals enableTBB ["tbb"]) ++
+    (lib.optionals enableRemoteClient ["server"]) ++
+    (lib.optionals enableRemoteServer ["client"])
+  );
+in
+
+stdenv.mkDerivation (finalAttrs: {
+  pname = "pocl";
+  version = featureList + "-" + source.version;
+  inherit (source) src;
+
+  patches = lib.optionals useGit [
+    ./0001-cmake-use-clang-from-cmake-variable.patch
+    ./0001-cmake-do-not-use-suffix.patch
+    ./0001-cmake-native-build-tools.patch
+  ];
+
+  cmakeFlags = [
+    (lib.cmakeOptionType "filepath" "WITH_LLVM_CONFIG"    (lib.getExe' buildLlvmPackages.llvm.dev     "llvm-config"))
+    (lib.cmakeOptionType "filepath" "CLANG"               (lib.getExe' buildLlvmPackages.clangUseLLVM "clang"))
+    (lib.cmakeOptionType "filepath" "CLANGXX"             (lib.getExe' buildLlvmPackages.clangUseLLVM "clang++"))
+    (lib.cmakeOptionType "path"     "CLANG_RESOURCE_DIR" "${llvmPackages.stdenv.cc}/resource-root")
+
+    (lib.cmakeBool "ENABLE_TESTS" finalAttrs.finalPackage.doCheck)
+
+    (lib.cmakeBool "ENABLE_RELOCATION"    true)
+    (lib.cmakeBool "ENABLE_POCL_BUILDING" false)
+
+    (lib.cmakeBool "ENABLE_TBB_DEVICE" enableTBB)
+    (lib.cmakeBool "ENABLE_OVNI"       enableOVNI)
+    (lib.cmakeBool "ENABLE_NOSV"       enableNOSV)
+    (lib.cmakeBool "ENABLE_ICD"        enableICD)
+    (lib.cmakeBool "ENABLE_HWLOC"      enableHWLOC)
+    (lib.cmakeBool "ENABLE_LTTNG"      enableLTTNG)
+
+    (lib.cmakeBool "ENABLE_REMOTE_CLIENT" enableRemoteClient)
+    (lib.cmakeBool "ENABLE_REMOTE_SERVER" enableRemoteServer)
+
+    # avoid the runtime linker pulling in a different llvm e.g. from graphics drivers
+    (lib.cmakeBool "STATIC_LLVM" staticLLVM)
+  ] ++ lib.optionals (!isCross && enableDistroVariants) [
+    (lib.cmakeFeature "KERNELLIB_HOST_CPU_VARIANTS" "distro") # TODO: check if we can do it when cross compiling
+  ] ++ lib.optionals isCross [
+    (lib.cmakeFeature "CMAKE_SYSTEM_NAME" "Linux")
+    (lib.cmakeFeature "CMAKE_FIND_ROOT_PATH_MODE_PROGRAM" "NEVER")
+    (lib.cmakeFeature "CMAKE_FIND_ROOT_PATH_MODE_LIBRARY" "ONLY")
+    (lib.cmakeFeature "CMAKE_FIND_ROOT_PATH_MODE_INCLUDE" "ONLY")
+    (lib.cmakeFeature "CMAKE_FIND_ROOT_PATH_MODE_PACKAGE" "ONLY")
+  ] ++ lib.optionals stdenv.hostPlatform.isRiscV [
+    (lib.cmakeFeature "LLC_TRIPLE"       "riscv64-unknown-linux-gnu")
+    (lib.cmakeFeature "LLC_HOST_CPU"     "rv64g")
+    (lib.cmakeFeature "CLANG_MARCH_FLAG" "-march=")
+  ];
+
+  # Fixes error: ld: cannot find -lgcc / -lgcc_s when linking from libpocl on
+  # host
+  preConfigure = ''
+    cmakeFlagsArray+=(
+      -DEXTRA_HOST_LD_FLAGS="${lib.escapeShellArg (builtins.readFile "${stdenv.cc}/nix-support/cc-ldflags")}"
+    )
+  '' + lib.optionalString stdenv.hostPlatform.isRiscV ''
+     cmakeFlagsArray+=(
+      -DEXTRA_HOST_LLC_FLAGS=${lib.escapeShellArg ([
+        "-march=rv64g"
+        "-mcpu=sifive-u74"
+      ])}
+      -DEXTRA_HOST_CLANG_FLAGS=${lib.escapeShellArg ([
+        "-mabi=lp64d"
+        "-march=rv64g"
+        "-mcpu=sifive-u74"
+        "-mtune=sifive-7-series"
+      ])}
+    )
+  '';
+
+  nativeBuildInputs = [
+    cmake
+    getconf
+    ninja
+    pkg-config
+    python3
+  ];
+
+  buildInputs = [
+    opencl-headers
+    llvmPackages.libclang
+    llvmPackages.llvm
+  ] ++ lib.optionals staticLLVM [ libxml2 ]
+  ++ lib.optionals enableNOSV   [ nosv ]
+  ++ lib.optionals enableOVNI   [ ovni ]
+  ++ lib.optionals enableHWLOC  [ hwloc ]
+  ++ lib.optionals enableTBB    [ tbb ]
+  ++ lib.optionals enableICD    [ ocl-icd ]
+  ++ lib.optionals enableLTTNG  [ lttng-ust ]
+  ++ lib.optionals enableSPIRV  [
+    (spirv-llvm-translator.override { inherit (llvmPackages) llvm; })
+    spirv-tools
+  ];
+
+  nativeInstallCheckInputs = [
+    writableTmpDirAsHomeHook
+  ];
+
+  doInstallCheck = true;
+
+  installCheckPhase = lib.optionalString enableICD ''
+    runHook preInstallCheck
+
+    export OCL_ICD_VENDORS=$out/etc/OpenCL/vendors
+    $out/bin/poclcc -o poclcc.cl.pocl $src/examples/poclcc/poclcc.cl
+
+    runHook postInstallCheck
+  '';
+
+  setupHook = ./setup-hook.sh;
+
+  passthru = {
+    updateScript = nix-update-script { };
+    git = finalAttrs.finalPackage.override { useGit = true; };
+  };
+
+  propagatedBuildInputs = [ stdenv.cc.cc ];
+
+  meta = with lib; {
+    description = "A portable open source (MIT-licensed) implementation of the OpenCL standard";
+    homepage = "http://portablecl.org";
+    license = licenses.mit;
+    maintainers = with maintainers; [
+      leixb
+      jansol
+      xddxdd
+      bsc.maintainers.leixb
+    ];
+    platforms = platforms.linux ++ platforms.darwin;
+  };
+})

pkgs/pocl/setup-hook.sh

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

test/bugs/hwloc.nix

@@ -6,7 +6,6 @@
 
 stdenv.mkDerivation {
   name = "hwloc-test";
-  requiredSystemFeatures = [ "sys-devices" ];
 
   src = ./.;
 
@@ -15,7 +14,7 @@ stdenv.mkDerivation {
   buildPhase = ''
     ls -l /sys
     gcc -lhwloc hwloc.c -o hwloc
-    strace ./hwloc > $out
+    strace ./hwloc
   '';
 
 }

test/compilers/clang-openmp-ld.nix

@@ -23,8 +23,9 @@ in stdenv.mkDerivation {
   dontUnpack = true;
   dontConfigure = true;
 
-  # nOS-V requires access to /sys/devices to request NUMA information
-  requiredSystemFeatures = [ "sys-devices" ];
+  # nOS-V requires access to /sys/devices to request NUMA information. It will
+  # fail to run otherwise, so we disable the sandbox for this test.
+  __noChroot = true;
 
   buildInputs = [ openmp ];
 

test/compilers/clang-openmp-nosv.nix

@@ -36,8 +36,9 @@ in stdenv.mkDerivation {
   dontUnpack = true;
   dontConfigure = true;
 
-  # nOS-V requires access to /sys/devices to request NUMA information
-  requiredSystemFeatures = [ "sys-devices" ];
+  # nOS-V requires access to /sys/devices to request NUMA information. It will
+  # fail to run otherwise, so we disable the sandbox for this test.
+  __noChroot = true;
 
   buildInputs = [ nosv ];
 

test/compilers/clang-openmp.nix

@@ -24,8 +24,9 @@ in stdenv.mkDerivation {
   dontUnpack = true;
   dontConfigure = true;
 
-  # nOS-V requires access to /sys/devices to request NUMA information
-  requiredSystemFeatures = [ "sys-devices" ];
+  # nOS-V requires access to /sys/devices to request NUMA information. It will
+  # fail to run otherwise, so we disable the sandbox for this test.
+  __noChroot = true;
 
   buildPhase = ''
     set -x

test/compilers/ompss2.nix

@@ -25,10 +25,9 @@ stdenv.mkDerivation rec {
   hardeningDisable = [ "all" ];
   #NIX_DEBUG = 1;
   buildInputs = [ ]; #strace gdb;
-
-  # NODES requires access to /sys/devices to request NUMA information
-  requiredSystemFeatures = [ "sys-devices" ];
-
+  # NODES requires access to /sys/devices to request NUMA information. It will
+  # fail to run otherwise, so we disable the sandbox for this test.
+  __noChroot = true;
   buildPhase = ''
     set -x
     #$CC -v

test/compilers/pocl.nix

@@ -0,0 +1,26 @@
+{
+  runCommand,
+  pocl,
+  clinfo,
+  writableTmpDirAsHomeHook,
+}:
+
+runCommand "clinfo-pocl"
+  {
+    nativeBuildInputs = [
+      clinfo
+      writableTmpDirAsHomeHook
+    ];
+
+    requiredSystemFeatures = [ "sys-devices" ];
+
+    env = {
+      POCL_DEBUG = "error,warn";
+      OCL_ICD_VENDORS = "${pocl}/etc/OpenCL/vendors";
+    };
+  }
+  ''
+    set -x
+    clinfo | tee $out
+    set +x
+  ''