Compilation Error with CMake & LLVM

[Scot-Survivor]

Describe the bug
The bug is that when you try to use CMake with Intel Clang or Clang++ it fails due to not being able to build the simple test program.

To Reproduce
Attempt to use CMake as your building script.
Set it to use a LLVM as the tool chain.

cmake_minimum_required(VERSION 3.23)
project(MachineLearning)

set(CMAKE_CXX_STANDARD 17)
include_directories($ENV{DPCPP_HOME}/llvm/build/include)
include_directories($ENV{DPCPP_HOME}/llvm/build/include/sycl/)
include_directories($ENV{DPCPP_HOME}/llvm/build/lib)

add_compile_options(-fsycl -fsycl-targets=nvptx64-nvidia-cuda -fsycl-unnamed-lambda)

add_executable(MachineLearning library.cpp)
target_link_directories(MachineLearning PUBLIC $ENV{DPCPP_HOME}/llvm/build/lib)

This is my CMakeLists.txt file.

Environment (please complete the following information):

• OS: Linux Ubuntu 20.04.4 LTS
• Target device and vendor: Nvidia RTX 2060
• DPC++ version: 770f540
• Dependencies version: N/A

Additional context
I am using CLion for my IDE in this case.

Exact error from CMake is:

-- The C compiler identification is Clang 16.0.0
-- The CXX compiler identification is Clang 16.0.0
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - failed
-- Check for working C compiler: /home/scot/sycl_workspace/llvm/build/bin/clang
-- Check for working C compiler: /home/scot/sycl_workspace/llvm/build/bin/clang - broken
CMake Error at /opt/cmake-3.24.1-linux-x86_64/share/cmake-3.24/Modules/CMakeTestCCompiler.cmake:69 (message):
  The C compiler

    "/home/scot/sycl_workspace/llvm/build/bin/clang"

  is not able to compile a simple test program.

  It fails with the following output:

    Change Dir: /home/scot/CLionProjects/MachineLearning/cmake-build-debug-dpc-cuda/CMakeFiles/CMakeTmp
    
    Run Build Command(s):/home/scot/.local/share/JetBrains/Toolbox/apps/CLion/ch-0/222.3345.126/bin/ninja/linux/ninja cmTC_27ff8 && [1/2] Building C object CMakeFiles/cmTC_27ff8.dir/testCCompiler.c.o
    [2/2] Linking C executable cmTC_27ff8
    FAILED: cmTC_27ff8 
    : && /home/scot/sycl_workspace/llvm/build/bin/clang   CMakeFiles/cmTC_27ff8.dir/testCCompiler.c.o -o cmTC_27ff8   && :
    clang-16: error: unable to execute command: Executable "ld" doesn't exist!
    clang-16: error: linker command failed with exit code 1 (use -v to see invocation)
    ninja: build stopped: subcommand failed.
    
    

  

  CMake will not be able to correctly generate this project.
Call Stack (most recent call first):
  CMakeLists.txt:2 (project)


-- Configuring incomplete, errors occurred!
See also "/home/scot/CLionProjects/MachineLearning/cmake-build-debug-dpc-cuda/CMakeFiles/CMakeOutput.log".
See also "/home/scot/CLionProjects/MachineLearning/cmake-build-debug-dpc-cuda/CMakeFiles/CMakeError.log".

Error and Output logs are both attached to this issue
[CMakeOutput.log](https://github.com/intel/llvm/files/9389476/CMakeOutput.log)
[CMakeError.log](https://github.com/intel/llvm/files/9389479/CMakeError.log)
.

[npmiller]

clang-16: error: unable to execute command: Executable "ld" doesn't exist!

It looks like the linker is missing on your system, you may need to install the binutils package.

[Scot-Survivor]

The thing is, I know I have the linker package because I've complied other of my own projects just fine.
I can get you the versions to be sure.

[npmiller]

Oh also, the -fsycl flags also need to be passed during linking, so this is not enough:

add_compile_options(-fsycl -fsycl-targets=nvptx64-nvidia-cuda -fsycl-unnamed-lambda)

You also need:

add_link_options(-fsycl -fsycl-targets=nvptx64-nvidia-cuda -fsycl-unnamed-lambda)

Or simply add them to CMAKE_CXX_FLAGS, but this usually shows up at execution, not during the configuration stage.

[Scot-Survivor]

Thank you, I shall test this later.

[KornevNikita]

@Scot-Survivor any updates?

[Scot-Survivor]

Hey, not yet, I've been processing data the last week or so, and I haven't been able to test anything, this data processing is taking much longer than I suspected

[AlexeySachkov]

@Scot-Survivor, there were no updates from you for a while, so I will add a Stale label to this issue: it will be then closed automatically if there would be no further activity in 30 days. Please let us know if the problem is still actual and the tracker shouldn't be closed

[github-actions]

This issue was closed because it has been stalled for 30 days with no activity. Please, re-open if the issue still exists.