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Summary
In theDirectProgramming/C++/StructuredGrids/iso3dfd_omp_offload/src/CMakeLists.txt, the default cmake instructions shown in the official guidance cmake -DVERIFY_RESULTS=0 .. cannot really successfully make-build the project successfully and report the below messages, indicating that the compiler is not set properly.
~/Documents/oneAPI-samples/DirectProgramming/C++/StructuredGrids/iso3dfd_omp_offload/src/build$ make -j[ 25%] Building CXX object CMakeFiles/iso3dfd.dir/utils.o[ 50%] Building CXX object CMakeFiles/iso3dfd.dir/iso3dfd.o[ 75%] Building CXX object CMakeFiles/iso3dfd.dir/iso3dfd_verify.oc++: error: unrecognized command-line option ‘-fiopenmp’; did you mean ‘-fopenmp’?c++: error: unrecognized command-line option ‘-fiopenmp’; did you mean ‘-fopenmp’?c++: error: unrecognized command-line option ‘-fiopenmp’; did you mean ‘-fopenmp’?c++: error: unrecognized command-line option ‘-fopenmp-targets=spir64’make[2]:*** [CMakeFiles/iso3dfd.dir/build.make:90: CMakeFiles/iso3dfd.dir/utils.o] Error 1make[2]:*** Waitingfor unfinished jobs....c++: error: unrecognized command-line option ‘-fopenmp-targets=spir64’c++: error: unrecognized command-line option ‘-fopenmp-targets=spir64’make[2]:*** [CMakeFiles/iso3dfd.dir/build.make:76: CMakeFiles/iso3dfd.dir/iso3dfd.o] Error 1make[2]:*** [CMakeFiles/iso3dfd.dir/build.make:104: CMakeFiles/iso3dfd.dir/iso3dfd_verify.o] Error 1make[1]:*** [CMakeFiles/Makefile2:84: CMakeFiles/iso3dfd.dir/all] Error 2make:*** [Makefile:91: all] Error 2
In the CMakeLists file, the 3rd line should be changed fromset(CMAKE_CXX_COMPILER "icpx") toset(CMAKE_CXX_COMPILER icpx). Or we should explicitly declare the compiler options.