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Hi,

EDIT: Apparently if we specify LANGUAGES CXX in project, cmake doesn't check for C compiler. So that issue is solved but it is still not taking dpcpp as a valid CXX compiler and throwing the error:

    Building CXX object CMakeFiles/cmTC_7c364.dir/testCXXCompiler.cxx.obj
    "C:/Program Files (x86)/Intel/oneAPI/compiler/latest/windows/bin/dpcpp.exe"  /nologo -TP   -Wno-sycl-strict  /MDd /Zi /Ob0 /Od /RTC1   /FoCMakeFiles/cmTC_7c364.dir/testCXXCompiler.cxx.obj /FdCMakeFiles/cmTC_7c364.dir/ -c C:/Users/intel/Downloads/cudacode/dpct_repos/libSGM_OneAPI/build/CMakeFiles/CMakeTmp/testCXXCompiler.cxx
    dpcpp: error: no such file or directory: 'C:/Program Files/Git/nologo'
    dpcpp: error: no such file or directory: 'C:/Program Files/Git/MDd'
    dpcpp: error: no such file or directory: 'C:/Program Files/Git/Zi'
    dpcpp: error: no such file or directory: 'C:/Program Files/Git/Ob0'
    dpcpp: error: no such file or directory: 'C:/Program Files/Git/Od'
    dpcpp: error: no such file or directory: 'C:/Program Files/Git/RTC1'
    dpcpp: error: no such file or directory: 'C:/Program Files/Git/FoCMakeFiles/cmTC_7c364.dir/testCXXCompiler.cxx.obj'
    dpcpp: error: no such file or directory: 'C:/Program Files/Git/FdCMakeFiles/cmTC_7c364.dir/'
    make.exe[1]: *** [CMakeFiles/cmTC_7c364.dir/testCXXCompiler.cxx.obj] Error 1
    make.exe[1]: Leaving directory `C:/Users/intel/Downloads/cudacode/dpct_repos/libSGM_OneAPI/build/CMakeFiles/CMakeTmp'
    make.exe: *** [cmTC_7c364/fast] Error 2

And I can't use clang++ as compiler as mentioned below.

--------------------------------------

tl;dr: how do I invoke cmake so that I can use dpcpp as c++ compiler on windows 10 (to generate Makefile)?

I am trying to build a library+test app (with gtest) however my issue is with CMAKE on windows 10.

It appears that with beta08, dpcpp interface has become more like MSVC compiler (switches starting with / instead of -).

If I use command 

 

cmake -G "Unix Makefiles" -D CMAKE_CXX_COMPILER=dpcpp ..

 

It finds gcc as c compiler and complains that clang & msvc can't be mixed.

 

CMake Error at C:/Program Files/CMake/share/cmake-3.16/Modules/Platform/Windows-Clang.cmake:104 (message):
  The current configuration mixes Clang and MSVC or some other CL compatible
  compiler tool.  This is not supported.  Use either clang or MSVC as both C
  and C++ compilers.

 

 if I give command:

 

cmake -G "Unix Makefiles" -D CMAKE_C_COMPILER=cl -D CMAKE_CXX_COMPILER=clang++ ..

 

It finds MSVC 19.23.28106.4 as C compiler and fails to compiler test c program with errors like;

 

Building C object CMakeFiles/cmTC_bafff.dir/testCCompiler.c.obj
    "C:/Program Files (x86)/Microsoft Visual Studio/2019/Community/VC/Tools/MSVC/14.23.28105/bin/Hostx64/x64/cl.exe"  /nologo   /DWIN32 /D_WINDOWS /W3  /MDd /Zi /Ob0 /Od /RTC1   /FoCMakeFiles/cmTC_bafff.dir/testCCompiler.c.obj /FdCMakeFiles/cmTC_bafff.dir/ /FS -c C:/Users/intel/Downloads/cudacode/dpct_repos/libSGM_OneAPI/build/CMakeFiles/CMakeTmp/testCCompiler.c
    Microsoft (R) C/C++ Optimizing Compiler Version 19.23.28106.4 for x64
    Copyright (C) Microsoft Corporation.  All rights reserved.

    cl : Command line warning D9024 : unrecognized source file type 'C:/Program Files/Git/nologo', object file assumed
    cl : Command line warning D9027 : source file 'C:/Program Files/Git/nologo' ignored
    cl : Command line warning D9024 : unrecognized source file type 'C:/Program Files/Git/DWIN32', object file assumed
    cl : Command line warning D9027 : source file 'C:/Program Files/Git/DWIN32' ignored
    cl : Command line warning D9024 : unrecognized source file type 'C:/Program Files/Git/D_WINDOWS', object file assumed
    cl : Command line warning D9027 : source file 'C:/Program Files/Git/D_WINDOWS' ignored
    cl : Command line warning D9024 : unrecognized source file type 'C:/Program Files/Git/W3', object file assumed
    cl : Command line warning D9027 : source file 'C:/Program Files/Git/W3' ignored
    cl : Command line warning D9024 : unrecognized source file type 'C:/Program Files/Git/MDd', object file assumed
    cl : Command line warning D9027 : source file 'C:/Program Files/Git/MDd' ignored

 

If I add following to CMakeLists.txt file

 

set(CMAKE_CXX_COMPILER "dpcpp")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-sycl-strict")

 

and give command

 

cmake -G "Unix Makefiles" ..

 

It again finds gcc and complains that Clang and MSVC can not be mixed (as in first case above)

If I use command (without adding dpcpp to CMakeLists.txt file)

 

cmake -G "Unix Makefiles" -D CMAKE_C_COMPILER=clang -D CMAKE_CXX_COMPILER=clang++ ..

 

It generates build files correctly but when I run make, it compiles my main source but gives following error (the source file is using dpct::device_vector so it includes dpct/dpstd_utils.hpp) for test case files:

 

[ 43%] Linking CXX static library sgm.lib
[ 43%] Built target sgm
Scanning dependencies of target gtest
[ 46%] Building CXX object test/googletest/googlemock/gtest/CMakeFiles/gtest.dir/src/gtest-all.cc.obj
[ 50%] Linking CXX static library gtestd.lib
[ 50%] Built target gtest
Scanning dependencies of target sgm-test
[ 53%] Building CXX object test/CMakeFiles/sgm-test.dir/census_transform_test.dp.cpp.obj
In file included from C:/Users/intel/Downloads/cudacode/dpct_repos/libSGM_OneAPI/test/census_transform_test.dp.cpp:3:
In file included from C:\Program Files (x86)\Intel\oneAPI\dpcpp-ct\latest\env\..\include\dpct/dpstd_utils.hpp:26:
In file included from C:\Program Files (x86)\Intel\oneAPI\compiler\latest\windows\include\dpstd/execution:49:
In file included from C:\Program Files (x86)\Intel\oneAPI\compiler\latest\windows\include\oneapi/dpl/pstl/glue_execution_defs.h:59:
In file included from C:\Program Files (x86)\Intel\oneAPI\compiler\latest\windows\include\oneapi/dpl/pstl/hetero/algorithm_impl_hetero.h:21:
In file included from C:\Program Files (x86)\Intel\oneAPI\compiler\latest\windows\include\oneapi/dpl/pstl/hetero/../parallel_backend.h:22:
In file included from C:\Program Files (x86)\Intel\oneAPI\compiler\latest\windows\include\oneapi/dpl/pstl/hetero/dpcpp/parallel_backend_sycl.h:27:
In file included from C:\Program Files (x86)\Intel\oneAPI\compiler\latest\windows\include\oneapi/dpl/pstl/hetero/dpcpp/../../iterator_impl.h:23:
In file included from C:\Program Files (x86)\Intel\oneAPI\compiler\latest\windows\include\oneapi/dpl/pstl/utils.h:31:
C:\Program Files (x86)\Intel\oneAPI\compiler\latest\windows\include\oneapi/dpl/pstl/hetero/dpcpp/sycl_iterator.h:178:59: error:
      no template named 'mode_tag_t' in namespace 'cl::sycl'
                                                    sycl::mode_tag_t<Mode> tag)
                                                    ~~~~~~^
C:\Program Files (x86)\Intel\oneAPI\compiler\latest\windows\include\oneapi/dpl/pstl/hetero/dpcpp/sycl_iterator.h:185:60: error:
      no template named 'mode_tag_t' in namespace 'cl::sycl'
    begin(sycl::buffer<T, /*dim=*/1, Allocator> buf, sycl::mode_tag_t<Mode> tag, sycl::property::noinit)
                                                     ~~~~~~^
C:\Program Files (x86)\Intel\oneAPI\compiler\latest\windows\include\oneapi/dpl/pstl/hetero/dpcpp/sycl_iterator.h:185:98: error:
      no type named 'noinit' in namespace 'cl::sycl::property'
    begin(sycl::buffer<T, /*dim=*/1, Allocator> buf, sycl::mode_tag_t<Mode> tag, sycl::property::noinit)
                                                                                 ~~~~~~~~~~~~~~~~^
C:\Program Files (x86)\Intel\oneAPI\compiler\latest\windows\include\oneapi/dpl/pstl/hetero/dpcpp/sycl_iterator.h:192:70: error:
      no type named 'noinit' in namespace 'cl::sycl::property'
    begin(sycl::buffer<T, /*dim=*/1, Allocator> buf, sycl::property::noinit)
                                                     ~~~~~~~~~~~~~~~~^
C:\Program Files (x86)\Intel\oneAPI\compiler\latest\windows\include\oneapi/dpl/pstl/hetero/dpcpp/sycl_iterator.h:199:100: error:
      no template named 'mode_tag_t' in namespace 'cl::sycl'
__internal::sycl_iterator<Mode, T, Allocator> end(sycl::buffer<T, /*dim=*/1, Allocator> buf, sycl::mode_tag_t<Mode> tag)
                                                                                             ~~~~~~^
C:\Program Files (x86)\Intel\oneAPI\compiler\latest\windows\include\oneapi/dpl/pstl/hetero/dpcpp/sycl_iterator.h:206:58: error:
      no template named 'mode_tag_t' in namespace 'cl::sycl'
    end(sycl::buffer<T, /*dim=*/1, Allocator> buf, sycl::mode_tag_t<Mode> tag, sycl::property::noinit)
                                                   ~~~~~~^
C:\Program Files (x86)\Intel\oneAPI\compiler\latest\windows\include\oneapi/dpl/pstl/hetero/dpcpp/sycl_iterator.h:206:96: error:
      no type named 'noinit' in namespace 'cl::sycl::property'
    end(sycl::buffer<T, /*dim=*/1, Allocator> buf, sycl::mode_tag_t<Mode> tag, sycl::property::noinit)
                                                                               ~~~~~~~~~~~~~~~~^
C:\Program Files (x86)\Intel\oneAPI\compiler\latest\windows\include\oneapi/dpl/pstl/hetero/dpcpp/sycl_iterator.h:213:94: error:
      no type named 'noinit' in namespace 'cl::sycl::property'
                                                                             sycl::property::noinit)
                                                                             ~~~~~~~~~~~~~~~~^
8 errors generated.
make[2]: *** [test/CMakeFiles/sgm-test.dir/census_transform_test.dp.cpp.obj] Error 1
make[1]: *** [test/CMakeFiles/sgm-test.dir/all] Error 2
make: *** [all] Error 2

 

I have tried to compile this file (census_transform_test.dp.cpp) as stand alone file with clang++ and I get same errors but not when i use dpcpp

So my question is, how do I invoke cmake so that I can use dpcpp as c++ compiler on windows 10?

I want to generate make files and not visual studio solution.

I converted all the files from repo libSGM and now trying to build it along with tests so that I can validate the dpct generated cpp code. I can share the converted code if required.

Regards,
Gagan

 

 

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Hi,

 

Clang/clang++ cannot be used to compile source files containing dpct headers (even if you try to provide dpct headers with -I). DPC++ compiler driver is required to compile dpct codes.

 

To correctly generate Unix makefiles using CMake on Windows, follow these steps:

 

  1. Open "Intel oneAPI command prompt for Microsoft Visual Studio 2019". This step will place DPC++ and other compilers in path. (by sourcing the setvars.bat file)
  2. Make sure that you have the directory containing make.exe in your environment PATH.
  3. Change current directory to your application directory containing CMakeLists.txt.
  4. mkdir build && cd build
  5. cmake -G "Unix Makefiles" -D CMAKE_C_COMPILER=dpcpp-cl -D CMAKE_CXX_COMPILER=dpcpp-cl ..

 

You should be able to see the output as follows:

RahulV_intel_0-1597407568973.png

 

 

To generate VS-2019 project files/Solution files (.VCXproj/.sln) using Cmake, the command would be:

 

cmake -T"Intel(R) oneAPI DPC++ Compiler" ..

 

 

Let me know if you face any issues.

 

Regards,

Rahul

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Hi,

 

Clang/clang++ cannot be used to compile source files containing dpct headers (even if you try to provide dpct headers with -I). DPC++ compiler driver is required to compile dpct codes.

 

To correctly generate Unix makefiles using CMake on Windows, follow these steps:

 

  1. Open "Intel oneAPI command prompt for Microsoft Visual Studio 2019". This step will place DPC++ and other compilers in path. (by sourcing the setvars.bat file)
  2. Make sure that you have the directory containing make.exe in your environment PATH.
  3. Change current directory to your application directory containing CMakeLists.txt.
  4. mkdir build && cd build
  5. cmake -G "Unix Makefiles" -D CMAKE_C_COMPILER=dpcpp-cl -D CMAKE_CXX_COMPILER=dpcpp-cl ..

 

You should be able to see the output as follows:

RahulV_intel_0-1597407568973.png

 

 

To generate VS-2019 project files/Solution files (.VCXproj/.sln) using Cmake, the command would be:

 

cmake -T"Intel(R) oneAPI DPC++ Compiler" ..

 

 

Let me know if you face any issues.

 

Regards,

Rahul

View solution in original post

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Hi Rahul,

Both methods are failing on windows 10.

Errors for Unix Makefiles option:

 

C:\Users\intel\Downloads\cudacode\dpct_repos\libSGM_OneAPI\build>cmake -G "Unix Makefiles" -D CMAKE_C_COMPILER=dpcpp-cl -D CMAKE_CXX_COMPILER=dpcpp-cl ..
-- The CXX compiler identification is Clang 11.0.0 with MSVC-like command-line
-- Check for working CXX compiler: C:/Program Files (x86)/Intel/oneAPI/compiler/latest/windows/bin/dpcpp-cl.exe
-- Check for working CXX compiler: C:/Program Files (x86)/Intel/oneAPI/compiler/latest/windows/bin/dpcpp-cl.exe -- broken
CMake Error at C:/Program Files/CMake/share/cmake-3.16/Modules/CMakeTestCXXCompiler.cmake:53 (message):
  The C++ compiler

    "C:/Program Files (x86)/Intel/oneAPI/compiler/latest/windows/bin/dpcpp-cl.exe"

  is not able to compile a simple test program.

  It fails with the following output:

    Change Dir: C:/Users/intel/Downloads/cudacode/dpct_repos/libSGM_OneAPI/build/CMakeFiles/CMakeTmp

    Run Build Command(s):C:/PROGRA~2/GnuWin32/bin/make.exe cmTC_b81e4/fast && C:/PROGRA~2/GnuWin32/bin/make.exe -f CMakeFiles/cmTC_b81e4.dir/build.make CMakeFiles/cmTC_b81e4.dir/build
    make.exe[1]: Entering directory `C:/Users/intel/Downloads/cudacode/dpct_repos/libSGM_OneAPI/build/CMakeFiles/CMakeTmp'
    Building CXX object CMakeFiles/cmTC_b81e4.dir/testCXXCompiler.cxx.obj
    "C:/Program Files (x86)/Intel/oneAPI/compiler/latest/windows/bin/dpcpp-cl.exe"  /nologo -TP   /DWIN32 /D_WINDOWS /W3 /GR /EHsc  /MDd /Zi /Ob0 /Od /RTC1   /FoCMakeFiles/cmTC_b81e4.dir/testCXXCompiler.cxx.obj /FdCMakeFiles/cmTC_b81e4.dir/ -c C:/Users/intel/Downloads/cudacode/dpct_repos/libSGM_OneAPI/build/CMakeFiles/CMakeTmp/testCXXCompiler.cxx
    dpcpp: error: no such file or directory: 'C:/Program Files/Git/nologo'
    dpcpp: error: no such file or directory: 'C:/Program Files/Git/DWIN32'
    dpcpp: error: no such file or directory: 'C:/Program Files/Git/D_WINDOWS'
    dpcpp: error: no such file or directory: 'C:/Program Files/Git/W3'
    dpcpp: error: no such file or directory: 'C:/Program Files/Git/GR'
    dpcpp: error: no such file or directory: 'C:/Program Files/Git/EHsc'
    dpcpp: error: no such file or directory: 'C:/Program Files/Git/MDd'
    dpcpp: error: no such file or directory: 'C:/Program Files/Git/Zi'
    dpcpp: error: no such file or directory: 'C:/Program Files/Git/Ob0'
    dpcpp: error: no such file or directory: 'C:/Program Files/Git/Od'
    dpcpp: error: no such file or directory: 'C:/Program Files/Git/RTC1'
    dpcpp: error: no such file or directory: 'C:/Program Files/Git/FoCMakeFiles/cmTC_b81e4.dir/testCXXCompiler.cxx.obj'
    dpcpp: error: no such file or directory: 'C:/Program Files/Git/FdCMakeFiles/cmTC_b81e4.dir/'
    make.exe[1]: *** [CMakeFiles/cmTC_b81e4.dir/testCXXCompiler.cxx.obj] Error 1
    make.exe[1]: Leaving directory `C:/Users/intel/Downloads/cudacode/dpct_repos/libSGM_OneAPI/build/CMakeFiles/CMakeTmp'
    make.exe: *** [cmTC_b81e4/fast] Error 2





  CMake will not be able to correctly generate this project.
Call Stack (most recent call first):
  CMakeLists.txt:26 (project)


-- Configuring incomplete, errors occurred!
See also "C:/Users/intel/Downloads/cudacode/dpct_repos/libSGM_OneAPI/build/CMakeFiles/CMakeOutput.log".
See also "C:/Users/intel/Downloads/cudacode/dpct_repos/libSGM_OneAPI/build/CMakeFiles/CMakeError.log".

And for Inntel DPC++ Compiler option:

C:\Users\intel\Downloads\cudacode\dpct_repos\libSGM_OneAPI\build>cmake -T"Intel(R) oneAPI DPC++ Compiler" ..
-- Building for: Visual Studio 16 2019
-- Selecting Windows SDK version 10.0.18362.0 to target Windows 10.0.18363.
-- The CXX compiler identification is Clang 11.0.0 with MSVC-like command-line
CMake Error at CMakeLists.txt:26 (project):
  No CMAKE_CXX_COMPILER could be found.



-- Configuring incomplete, errors occurred!
See also "C:/Users/intel/Downloads/cudacode/dpct_repos/libSGM_OneAPI/build/CMakeFiles/CMakeOutput.log".

 

I'm not sure what am I missing.

Regards,
Gagan

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Hi,


Could you attach your CMakeLists.txt file if possible?


I have tried to generate Unix Makefiles on sepia-filter official sample with CMake version 3.17. It seems to work for me with the steps that I had given earlier.


Link: https://github.com/oneapi-src/oneAPI-samples/tree/master/DirectProgramming/DPC%2B%2B/CombinationalLo...


Let me know if you are able to generate Unix Makefiles for this application with the steps that I had provided earlier.


Thanks,

Rahul


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Hi,


Just a quick reminder to attach your CMakeLists.txt file.


Thanks,

Rahul


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Sorry for the delay.

CMakeFiles.are attached.

It is building fine on linux but not on windows.

Regards,
Gagan

 

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Hi,

 

I don't see any issue with your CMakelists file.

 

Could you also try building the Github sample which I had sent earlier on Windows and see if that works?

 

Alternatively, you may try upgrading your CMake to the latest version and see if it helps.

 

 

Thanks,

Rahul

 

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Hi,


Any updates on this? Did the CMakeLists file from the official sample work for you?


Thanks,

Rahul


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Hi Rahul,

Sorry for the delay. I tried it on linux and it worked fine

Now I have updated CMAKE on windows to CMAKE version 3.18.2 and it is working as expecting and generating Makefiles properly for my project libSGM_OneAPI.

Though cmake _T"..." option is still not working on windows. But its okay. I'm not stuck anymore.
Just for reference, error I get is - "No CMAKE_CXX_COMPILER could be found"

Thanks for your support.

Regards,
Gagan

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Hi Gagan,


Good to know that it worked.


There could be an integration issue with your VS-19, leading to errors with "cmake -T" while generating VS project files. Running the installation in repair mode could help.


Also, let me know if I can close this thread from my end.



Thanks,

Rahul


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Intel will no longer monitor this thread. However, this thread will remain open for community discussion.

 

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