Fix the linking error of multiple definition of 'computeGerschgorin' for sample eigenValues

[tomflinda]

Signed-off-by: chenwei.sun chenwei.sun@intel.com

[jimmytwei]

I'm not getting any linking errors compiling the code sample. I did update the header file to use "image.hpp" instead of <image.hpp> but didn't need to remove the other file.

Example output:

$ mkdir build; cd build; cmake ..; cmake -D INTEL_MAX_GPU=1 ..; make; make run
-- The C compiler identification is GNU 11.4.0
-- The CXX compiler identification is IntelLLVM 2025.2.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /opt/notebooks/user_home/intel/oneapi/compiler/2025.2/bin/icpx - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Default CMAKE_BUILD_TYPE not set using Release with Debug Info
-- Configuring done
-- Generating done
-- Build files have been written to: /opt/notebooks/user_home/oneAPI-samples/DirectProgramming/C++SYCL/SYCLMigration/guided_eigenValues_SYCLMigration/build
-- Configuring done
-- Generating done
-- Build files have been written to: /opt/notebooks/user_home/oneAPI-samples/DirectProgramming/C++SYCL/SYCLMigration/guided_eigenValues_SYCLMigration/build
[ 14%] Building CXX object 02_sycl_migrated/CMakeFiles/02_sycl_migrated.dir/Samples/2_Concepts_and_Techniques/eigenvalues/main.dp.cpp.o
[ 28%] Building CXX object 02_sycl_migrated/CMakeFiles/02_sycl_migrated.dir/Samples/2_Concepts_and_Techniques/eigenvalues/gerschgorin.cpp.o
[ 42%] Building CXX object 02_sycl_migrated/CMakeFiles/02_sycl_migrated.dir/Samples/2_Concepts_and_Techniques/eigenvalues/bisect_large.dp.cpp.o
[ 57%] Building CXX object 02_sycl_migrated/CMakeFiles/02_sycl_migrated.dir/Samples/2_Concepts_and_Techniques/eigenvalues/bisect_small.dp.cpp.o
[ 71%] Building CXX object 02_sycl_migrated/CMakeFiles/02_sycl_migrated.dir/Samples/2_Concepts_and_Techniques/eigenvalues/bisect_util.dp.cpp.o
[ 85%] Building CXX object 02_sycl_migrated/CMakeFiles/02_sycl_migrated.dir/Samples/2_Concepts_and_Techniques/eigenvalues/matlab.cpp.o
[100%] Linking CXX executable ../bin/02_sycl_migrated
Compilation from IR - skipping loading of FCL
Build succeeded.
Compilation from IR - skipping loading of FCL
Build succeeded.
Compilation from IR - skipping loading of FCL
Build succeeded.
[100%] Built target 02_sycl_migrated
Starting eigenvalues

Running on Intel(R) Data Center GPU Max 1100
Matrix size: 2048 x 2048
Precision: 0.000010
Iterations to be timed: 100
Result filename: 'eigenvalues.dat'
Gerschgorin interval: -2.894310 / 2.923303
Average time step 1: 5.769216 ms
Average time step 2, one intervals: 0.009240 ms
Average time step 2, mult intervals: 0.008500 ms
Average time TOTAL: 13.913960 ms
Test Succeeded!
Built target run

[tomflinda]

@jimmytwei the default CMake build script is for folder SYCLMigration/guided_eigenValues_SYCLMigration/02_sycl_migrated , more detail, pls refer to

oneAPI-samples/DirectProgramming/C++SYCL/SYCLMigration/guided_eigenValues_SYCLMigration/CMakeLists.txt

Line 19 in 8005b6a

add_subdirectory (02_sycl_migrated)

Current PR is targeted to fix the link issue in folder SYCLMigration/guided_eigenValues_SYCLMigration/01_dpct_output