IntelSYCLConfig.cmake fails on Windows

cwasser — Wed, 02 Apr 2025 12:38:33 GMT

Hello,

I installed the oneAPI Base Toolkit 2025.1, and I am using it with CMake on Windows 11.

In the CMake file, I use the IntelSYCLConfig.cmake via:

find_package(IntelSYCL CONFIG REQUIRED)

This currently fails like this:

-- The CXX compiler identification is IntelLLVM 2025.1.0 with MSVC-like command-line -- Detecting CXX compiler ABI info -- Detecting CXX compiler ABI info - done -- Check for working CXX compiler: C:/Program Files (x86)/Intel/oneAPI/compiler/latest/bin/icx.exe - skipped -- Detecting CXX compile features -- Detecting CXX compile features - done Intel(R) oneAPI DPC++/C++ Compiler for applications running on Intel(R) 64, Version 2025.1.0 Build 20250317 Copyright (C) 1985-2025 Intel Corporation. All rights reserved. -- SYCL Compiler version: 20250100 -- SYCL_INCLUDE_DIR: C:/Program Files (x86)/Intel/oneAPI/compiler/latest/include -- SYCL_LIBRARY=SYCL_LIBRARY-NOTFOUND CMake Error at C:/Program Files (x86)/Intel/oneAPI/compiler/latest/lib/cmake/IntelSYCL/IntelSYCLConfig.cmake:223 (separate_arguments): separate_arguments given unexpected argument(s) Call Stack (most recent call first): C:/Program Files (x86)/Intel/oneAPI/compiler/latest/lib/cmake/IntelSYCL/IntelSYCLConfig.cmake:380 (SYCL_FEATURE_TEST_BUILD) CMakeLists.txt:5 (find_package) CMake Error at C:/Program Files (x86)/Intel/oneAPI/compiler/latest/lib/cmake/IntelSYCL/IntelSYCLConfig.cmake:386 (SYCL_FEATURE_TEST_EXTRACT): SYCL_FEATURE_TEST_EXTRACT Function invoked with incorrect arguments for function named: SYCL_FEATURE_TEST_EXTRACT Call Stack (most recent call first): CMakeLists.txt:5 (find_package) CMake Error at C:/Program Files/CMake/share/cmake-3.31/Modules/FindPackageHandleStandardArgs.cmake:233 (message): Could NOT find IntelSYCL (missing: SYCL_LIBRARY) Reason given by package: SYCL: It appears that the C:/Program Files (x86)/Intel/oneAPI/compiler/latest/bin/icx.exe does not support SYCL Call Stack (most recent call first): C:/Program Files/CMake/share/cmake-3.31/Modules/FindPackageHandleStandardArgs.cmake:603 (_FPHSA_FAILURE_MESSAGE) C:/Program Files (x86)/Intel/oneAPI/compiler/latest/lib/cmake/IntelSYCL/IntelSYCLConfig.cmake:422 (find_package_handle_standard_args) CMakeLists.txt:5 (find_package) CMake Error at CMakeLists.txt:5 (find_package): Found package configuration file: C:/Program Files (x86)/Intel/oneAPI/compiler/latest/lib/cmake/IntelSYCL/IntelSYCLConfig.cmake but it set IntelSYCL_FOUND to FALSE so package "IntelSYCL" is considered to be NOT FOUND. Reason given by package: SYCL: It appears that the C:/Program Files (x86)/Intel/oneAPI/compiler/latest/bin/icx.exe does not support SYCL -- Configuring incomplete, errors occurred! PS E:\cpp\sycl_test>

I debugged this to C:\Program Files (x86)\Intel\oneAPI\compiler\latest\lib\cmake\IntelSYCL\IntelSYCLConfig.cmake:332

Lines 330-333 look like this:

#TODO by default use sycl7 for windows if(WIN32) set(sycl_lib_suffix "7") else()

The problem is that it is looking for sycl7. However, for me, I can only find sycl.lib or sycl8.lib:

> ls 'C:/Program Files (x86)/Intel/oneAPI/compiler/latest/lib/sycl*' Directory: C:\Program Files (x86)\Intel\oneAPI\compiler\latest\lib Mode LastWriteTime Length Name ---- ------------- ------ ---- -a--- 17.03.2025 20:45 3352918 sycl-devicelib-host.lib -a--- 17.03.2025 20:45 3352942 sycl-devicelib-host.new.lib -a--- 17.03.2025 20:45 2032372 sycl-preview.lib -a--- 17.03.2025 20:45 2036640 sycl-previewd.lib -a--- 17.03.2025 20:45 2016022 sycl.lib -a--- 17.03.2025 20:45 2032372 sycl8-preview.lib -a--- 17.03.2025 20:45 2036640 sycl8-previewd.lib -a--- 17.03.2025 20:45 2016022 sycl8.lib -a--- 17.03.2025 20:45 2020306 sycl8d.lib -a--- 17.03.2025 20:45 2020306 sycld.lib

Either remove the default sycl_lib_suffix completely, or also look for version 8 and other future versions. So you don't need to constantly update IntelSYCLConfig.cmake.

Locally, I fixed this by doing the following before the find_package call:

set(SYCL_LIB_SUFFIX "8")

Another problem is that on line 362 you are appending another SYCL_FLAG to a list:

# TODO verify if this is needed # Windows: Add Exception handling if(WIN32) list(APPEND SYCL_FLAGS "/EHsc") endif()

This later breaks the separate_arguments on line 223.

You need to convert the list to a command line before line 223. I fixed this locally by inserting the following before line 223:

string(REPLACE ";" " " SYCL_CXX_FLAGS_LIST "${SYCL_CXX_FLAGS_LIST}")

I have attached the partially fixed IntelSYCLConfig.cmake

But I don't know if that is the best way to do this

Best regards,

Clemens

Re: IntelSYCLConfig.cmake fails on Windows

Sravani_K_Intel — Wed, 02 Apr 2025 21:43:40 GMT

There is a known issue when compiling SYCL code on Windows using CMake with the latest 2025.1 version of the compiler which can cause errors like

CMake Error at C:/Program Files/CMake/share/cmake-3.31/Modules/FindPackageHandleStandardArgs.cmake:233 (message):

Could NOT find IntelSYCL (missing: SYCL_LIBRARY)

Reason given by package: SYCL: It appears that the C:/Program Files (x86)/Intel/oneAPI/compiler/latest/bin/icx.exe does not support SYCL

Workaround: C:\Program Files (x86)\Intel\oneAPI\compiler\latest\lib\cmake\IntelSYCL\IntelSYCLConfig.cmake file needs to be updated with the following two changes:

Line 332: Update set(sycl_lib_suffix "7") with set(sycl_lib_suffix "8")
Line 365: Replace set(SYCL_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${SYCL_FLAGS}") with

list(JOIN SYCL_FLAGS " " SYCL_FLAGS_STRING)

message(DEBUG "SYCL_FLAGS_STRING: ${SYCL_FLAGS_STRING}")

set(SYCL_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${SYCL_FLAGS_STRING}")

A fix for this issue will be available in an upcoming compiler release.

topic Re: IntelSYCLConfig.cmake fails on Windows in Intel® oneAPI DPC++/C++ Compiler

IntelSYCLConfig.cmake fails on Windows

Re: IntelSYCLConfig.cmake fails on Windows