[sycl] Improve build configuration. (#10548)

Co-authored-by: Dmitry Razdoburdin <>

.github/workflows/main.yml

@@ -95,7 +95,7 @@ jobs:
       run: |
         mkdir build
         cd build
-        cmake .. -DGOOGLE_TEST=ON -DUSE_DMLC_GTEST=ON -DPLUGIN_SYCL=ON -DCMAKE_INSTALL_PREFIX=$CONDA_PREFIX
+        cmake .. -DGOOGLE_TEST=ON -DUSE_DMLC_GTEST=ON -DPLUGIN_SYCL=ON -DCMAKE_CXX_COMPILER=g++ -DCMAKE_C_COMPILER=gcc -DCMAKE_INSTALL_PREFIX=$CONDA_PREFIX
         make -j$(nproc)
     - name: Run gtest binary for SYCL
       run: |

.github/workflows/python_tests.yml

@@ -294,7 +294,7 @@ jobs:
       run: |
         mkdir build
         cd build
-        cmake .. -DPLUGIN_SYCL=ON -DCMAKE_PREFIX_PATH=$CONDA_PREFIX
+        cmake .. -DPLUGIN_SYCL=ON -DCMAKE_CXX_COMPILER=g++ -DCMAKE_C_COMPILER=gcc -DCMAKE_PREFIX_PATH=$CONDA_PREFIX
         make -j$(nproc)
     - name: Install Python package
       run: |

CMakeLists.txt

@@ -1,8 +1,6 @@
 cmake_minimum_required(VERSION 3.18 FATAL_ERROR)
 
 if(PLUGIN_SYCL)
-  set(CMAKE_CXX_COMPILER  "g++")
-  set(CMAKE_C_COMPILER  "gcc")
   string(REPLACE " -isystem ${CONDA_PREFIX}/include" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
 endif()
 

plugin/CMakeLists.txt

@@ -10,14 +10,14 @@ if(PLUGIN_SYCL)
     target_compile_definitions(plugin_sycl PUBLIC -DXGBOOST_USE_SYCL=1)
     target_link_libraries(plugin_sycl PUBLIC -fsycl)
     set_target_properties(plugin_sycl PROPERTIES
-    COMPILE_FLAGS -fsycl
+    COMPILE_FLAGS "-fsycl -fno-sycl-id-queries-fit-in-int"
     CXX_STANDARD 17
     CXX_STANDARD_REQUIRED ON
     POSITION_INDEPENDENT_CODE ON)
   if(USE_OPENMP)
     find_package(OpenMP REQUIRED)
     set_target_properties(plugin_sycl PROPERTIES
-    COMPILE_FLAGS "-fsycl -qopenmp")
+    COMPILE_FLAGS "-fsycl -fno-sycl-id-queries-fit-in-int -qopenmp")
   endif()
   # Get compilation and link flags of plugin_sycl and propagate to objxgboost
   target_link_libraries(objxgboost PUBLIC plugin_sycl)