Switch to conda-forge ocl-icd loader packages

CHANGELOG.md

@@ -39,6 +39,7 @@ This release is compatible with NumPy 2.5.
 * Removed dead code branches guarded by outdated oneMKL and DPC++ compiler version checks [#2999](https://github.com/IntelPython/dpnp/pull/2999)
 * Replaced the deprecated `nd_item::barrier()` member calls in the `accumulators` and `gemm` kernels with the SYCL 2020 `sycl::group_barrier()` free function [#3006](https://github.com/IntelPython/dpnp/pull/3006)
 * Changed `dpnp.broadcast_arrays` and `dpnp.tensor.broadcast_arrays` to return a tuple instead of a list, aligning with the 2025.12 Python array API spec [#2944](https://github.com/IntelPython/dpnp/pull/2944)
+* Bumped the default minimum required DPC++ compiler version to `2026.1.1` and migrated to the OpenCL ICD loader from the conda-forge `ocl-icd-system` (Linux) and `khronos-opencl-icd-loader` (Windows) packages [#2905](https://github.com/IntelPython/dpnp/pull/2905)
 
 ### Deprecated
 

conda-recipe/meta.yaml

@@ -1,7 +1,26 @@
 {% set max_compiler_and_mkl_version = environ.get("MAX_BUILD_CMPL_MKL_VERSION", "2027.0a0") %}
-{% set required_compiler_and_mkl_version = "2026.0" %}
+{% set required_compiler_version = environ.get("MIN_BUILD_CMPL_VERSION", "2026.1.1") %}
+{% set required_mkl_version = "2026.0" %}
 {% set required_dpctl_version = "0.23.0dev0" %}
 
+{# DPNP does not support a compiler older than 2026.0, so reject any #}
+{# MIN_BUILD_CMPL_VERSION override below that by calling an undefined macro. #}
+{% if required_compiler_version.split('.') | map('int') | list < [2026, 0] %}
+{{ MIN_BUILD_CMPL_VERSION_must_be_at_least_2026_0() }}
+{% endif %}
+
+{# The minimum compiler version must stay strictly below the (exclusive) maximum, #}
+{# otherwise the ">=min,<max" compiler pin collapses to an unsolvable empty range. #}
+{% if required_compiler_version.split('.') | map('int') | list >= max_compiler_and_mkl_version.split('.') | map('int') | list %}
+{{ MIN_BUILD_CMPL_VERSION_must_be_below_MAX_BUILD_CMPL_MKL_VERSION() }}
+{% endif %}
+
+{# The conda-forge OpenCL ICD loaders (ocl-icd-system / khronos-opencl-icd-loader) #}
+{# require DPC++ RT of 2026.1.1 or newer when installing from the Intel channel. #}
+{# So fall back to intel-gpu-ocl-icd-system for older Intel channel DPC++ RTs. #}
+{# Building and installing solely with conda-forge channel works with any 2026.0+ compiler. #}
+{% set use_conda_forge_ocl_icd = required_compiler_version.split('.') | map('int') | list >= [2026, 1, 1] %}
+
 {% set pyproject = load_file_data('pyproject.toml') %}
 {% set py_build_deps = pyproject.get('build-system', {}).get('requires', []) %}
 
@@ -33,14 +52,14 @@ requirements:
       # versioneer dependency
       - tomli # [py<311]
       # Do not use pyproject.toml for setting dependencies on OneAPI packages
-      - mkl-devel-dpcpp >={{ required_compiler_and_mkl_version }},<{{ max_compiler_and_mkl_version }}
+      - mkl-devel-dpcpp >={{ required_mkl_version }},<{{ max_compiler_and_mkl_version }}
       - onedpl-devel
       - tbb-devel
       - opencl-headers >=2025.06.13 # [win]
     build:
       - {{ compiler('cxx') }}
       - {{ stdlib('c') }}
-      - {{ compiler('dpcpp') }} >={{ required_compiler_and_mkl_version }},<{{ max_compiler_and_mkl_version }}
+      - {{ compiler('dpcpp') }} >={{ required_compiler_version }},<{{ max_compiler_and_mkl_version }}
     run:
       - python
       - python-gil     # [py>=314]
@@ -55,7 +74,12 @@ requirements:
       - {{ pin_compatible('onemkl-sycl-rng', min_pin='x.x', max_pin='x') }}
       - {{ pin_compatible('onemkl-sycl-vm', min_pin='x.x', max_pin='x') }}
       - numpy
+      {% if use_conda_forge_ocl_icd %}
+      - ocl-icd-system  # [linux]
+      - khronos-opencl-icd-loader  # [win]
+      {% else %}
       - intel-gpu-ocl-icd-system
+      {% endif %}
 
 build:
     number: {{ GIT_DESCRIBE_NUMBER }}

doc/quick_start_guide.rst

@@ -95,7 +95,7 @@ On Linux:
 .. code-block:: bash
 
     conda create -n build-env dpctl cython dpcpp_linux-64 mkl-devel-dpcpp tbb-devel        \
-          onedpl-devel cmake scikit-build ninja versioneer pytest intel-gpu-ocl-icd-system \
+          onedpl-devel cmake scikit-build ninja versioneer pytest ocl-icd-system           \
           -c dppy/label/dev -c https://software.repos.intel.com/python/conda/ -c conda-forge --override-channels
     conda activate build-env
 
@@ -104,7 +104,7 @@ On Windows:
 .. code-block:: bash
 
     conda create -n build-env dpctl cython dpcpp_win-64 mkl-devel-dpcpp tbb-devel          \
-          onedpl-devel cmake scikit-build ninja versioneer pytest intel-gpu-ocl-icd-system \
+          onedpl-devel cmake scikit-build ninja versioneer pytest khronos-opencl-icd-loader\
           -c dppy/label/dev -c https://software.repos.intel.com/python/conda/ -c conda-forge --override-channels
     conda activate build-env