I need help building the demo

[ThanosFisherman]

Hello, I need some assistance on building the sample on my Arch linux. I follow the instructions but I ran into the following error while running setup_native_build.sh

setup_native_build.sh: line 19: gclient: command not found

I then ignored it and moven on to building with cmake as per instructions. Then I also got the following errors

-- Found PythonInterp: /usr/bin/python3 (found suitable version "3.12.5", minimum required is "3")
-- Could NOT find Doxygen (missing: DOXYGEN_EXECUTABLE) 
Doxygen not found. Skipping documentation
-- Dawn: using SPIRV-Headers at /home/thanos/CLionProjects/webgpu-cross-platform-demo/third_party/dawn/third_party/vulkan-deps/spirv-headers/src
CMake Error at third_party/dawn/third_party/CMakeLists.txt:23 (add_subdirectory):
  add_subdirectory given source
  "/home/thanos/CLionProjects/webgpu-cross-platform-demo/third_party/dawn/third_party/vulkan-deps/spirv-headers/src"
  which is not an existing directory.


-- Dawn: using SPIRV-Tools at /home/thanos/CLionProjects/webgpu-cross-platform-demo/third_party/dawn/third_party/vulkan-deps/spirv-tools/src
CMake Error at third_party/dawn/third_party/CMakeLists.txt:48 (add_subdirectory):
  add_subdirectory given source
  "/home/thanos/CLionProjects/webgpu-cross-platform-demo/third_party/dawn/third_party/vulkan-deps/spirv-tools/src"
  which is not an existing directory.


-- Dawn: using GLFW at /home/thanos/CLionProjects/webgpu-cross-platform-demo/third_party/dawn/third_party/glfw
CMake Error at third_party/dawn/third_party/CMakeLists.txt:62 (add_subdirectory):
  add_subdirectory given source
  "/home/thanos/CLionProjects/webgpu-cross-platform-demo/third_party/dawn/third_party/glfw"
  which is not an existing directory.


-- Dawn: using Abseil at /home/thanos/CLionProjects/webgpu-cross-platform-demo/third_party/dawn/third_party/abseil-cpp
CMake Error at third_party/dawn/third_party/CMakeLists.txt:76 (add_subdirectory):
  add_subdirectory given source
  "/home/thanos/CLionProjects/webgpu-cross-platform-demo/third_party/dawn/third_party/abseil-cpp"
  which is not an existing directory.


-- Dawn: using Vulkan-Headers at /home/thanos/CLionProjects/webgpu-cross-platform-demo/third_party/dawn/third_party/vulkan-deps/vulkan-headers/src
CMake Error at third_party/dawn/third_party/CMakeLists.txt:81 (add_subdirectory):
  add_subdirectory given source
  "/home/thanos/CLionProjects/webgpu-cross-platform-demo/third_party/dawn/third_party/vulkan-deps/vulkan-headers/src"
  which is not an existing directory.

Any help would be appreciated.

[kainino0x]

The gclient step is required. You can get it from depot_tools, see here: https://chromium.googlesource.com/chromium/src/+/main/docs/linux/build_instructions.md#install

You might want to try https://github.com/beaufortfrancois/webgpu-cross-platform-app instead as it's very similar but a bit more maintained, and I think it takes advantage of git submodules instead of requiring gclient. (I think.)

[ThanosFisherman]

I cloned depot_tools and added gclient to PATH. I executed the setup_native_build.sh once again and everything seemed to build fine. However I got a bunch of new errors upon running make.

/home/thanos/CLionProjects/webgpu-cross-platform-demo/main.cpp:80:48: error: conflicting declaration ‘std::unique_ptr<dawn::native::Instance> instance’
   80 | static std::unique_ptr<dawn::native::Instance> instance;
      |                                                ^~~~~~~~
/home/thanos/CLionProjects/webgpu-cross-platform-demo/main.cpp:35:23: note: previous declaration as ‘wgpu::Instance instance’
   35 | static wgpu::Instance instance;
      |                       ^~~~~~~~
/home/thanos/CLionProjects/webgpu-cross-platform-demo/main.cpp: In function ‘void GetDevice(void (*)(wgpu::Device))’:
/home/thanos/CLionProjects/webgpu-cross-platform-demo/main.cpp:327:57: error: no match for ‘operator=’ (operand types are ‘wgpu::Instance’ and ‘std::__detail::__unique_ptr_t<dawn::native::Instance>’)
  327 |     instance = std::make_unique<dawn::native::Instance>();
      |                                                         ^
In file included from /home/thanos/CLionProjects/webgpu-cross-platform-demo/main.cpp:18:
/home/thanos/CLionProjects/webgpu-cross-platform-demo/out/native/third_party/dawn/gen/include/dawn/webgpu_cpp.h:728:18: note: candidate: ‘Derived& wgpu::ObjectBase<Derived, CType>::operator=(std::nullptr_t) [with Derived = wgpu::Instance; CType = WGPUInstanceImpl*; std::nullptr_t = std::nullptr_t]’
  728 |         Derived& operator=(std::nullptr_t) {
      |                  ^~~~~~~~
/home/thanos/CLionProjects/webgpu-cross-platform-demo/out/native/third_party/dawn/gen/include/dawn/webgpu_cpp.h:728:28: note:   no known conversion for argument 1 from ‘std::__detail::__unique_ptr_t<dawn::native::Instance>’ to ‘std::nullptr_t’
  728 |         Derived& operator=(std::nullptr_t) {
      |                            ^~~~~~~~~~~~~~
/home/thanos/CLionProjects/webgpu-cross-platform-demo/out/native/third_party/dawn/gen/include/dawn/webgpu_cpp.h:717:18: note: candidate: ‘Derived& wgpu::ObjectBase<Derived, CType>::operator=(wgpu::ObjectBase<Derived, CType>&&) [with Derived = wgpu::Instance; CType = WGPUInstanceImpl*]’
  717 |         Derived& operator=(ObjectBase&& other) {
      |                  ^~~~~~~~
/home/thanos/CLionProjects/webgpu-cross-platform-demo/out/native/third_party/dawn/gen/include/dawn/webgpu_cpp.h:717:41: note:   no known conversion for argument 1 from ‘std::__detail::__unique_ptr_t<dawn::native::Instance>’ to ‘wgpu::ObjectBase<wgpu::Instance, WGPUInstanceImpl*>&&’
  717 |         Derived& operator=(ObjectBase&& other) {
      |                            ~~~~~~~~~~~~~^~~~~
/home/thanos/CLionProjects/webgpu-cross-platform-demo/out/native/third_party/dawn/gen/include/dawn/webgpu_cpp.h:703:18: note: candidate: ‘Derived& wgpu::ObjectBase<Derived, CType>::operator=(const wgpu::ObjectBase<Derived, CType>&) [with Derived = wgpu::Instance; CType = WGPUInstanceImpl*]’
  703 |         Derived& operator=(ObjectBase const& other) {
      |                  ^~~~~~~~
/home/thanos/CLionProjects/webgpu-cross-platform-demo/out/native/third_party/dawn/gen/include/dawn/webgpu_cpp.h:703:46: note:   no known conversion for argument 1 from ‘std::__detail::__unique_ptr_t<dawn::native::Instance>’ to ‘const wgpu::ObjectBase<wgpu::Instance, WGPUInstanceImpl*>&’
  703 |         Derived& operator=(ObjectBase const& other) {
      |                            ~~~~~~~~~~~~~~~~~~^~~~~
/home/thanos/CLionProjects/webgpu-cross-platform-demo/out/native/third_party/dawn/gen/include/dawn/webgpu_cpp.h:976:11: note: candidate: ‘wgpu::Instance& wgpu::Instance::operator=(const wgpu::Instance&)’
  976 |     class Instance : public ObjectBase<Instance, WGPUInstance> {
      |           ^~~~~~~~
/home/thanos/CLionProjects/webgpu-cross-platform-demo/out/native/third_party/dawn/gen/include/dawn/webgpu_cpp.h:976:11: note:   no known conversion for argument 1 from ‘std::__detail::__unique_ptr_t<dawn::native::Instance>’ to ‘const wgpu::Instance&’
/home/thanos/CLionProjects/webgpu-cross-platform-demo/out/native/third_party/dawn/gen/include/dawn/webgpu_cpp.h:976:11: note: candidate: ‘wgpu::Instance& wgpu::Instance::operator=(wgpu::Instance&&)’
/home/thanos/CLionProjects/webgpu-cross-platform-demo/out/native/third_party/dawn/gen/include/dawn/webgpu_cpp.h:976:11: note:   no known conversion for argument 1 from ‘std::__detail::__unique_ptr_t<dawn::native::Instance>’ to ‘wgpu::Instance&&’
/home/thanos/CLionProjects/webgpu-cross-platform-demo/main.cpp:328:13: error: base operand of ‘->’ has non-pointer type ‘wgpu::Instance’
  328 |     instance->DiscoverDefaultAdapters();
      |             ^~
/home/thanos/CLionProjects/webgpu-cross-platform-demo/main.cpp:330:29: error: base operand of ‘->’ has non-pointer type ‘wgpu::Instance’
  330 |     auto adapters = instance->GetAdapters();
      |                             ^~
/home/thanos/CLionProjects/webgpu-cross-platform-demo/main.cpp: In function ‘void init()’:
/home/thanos/CLionProjects/webgpu-cross-platform-demo/main.cpp:394:18: error: ‘struct wgpu::ShaderModuleWGSLDescriptor’ has no member named ‘code’
  394 |         wgslDesc.code = shaderCode;
      |                  ^~~~
In file included from /usr/include/X11/Xlib.h:44,
                 from /home/thanos/CLionProjects/webgpu-cross-platform-demo/third_party/dawn/third_party/glfw/include/GLFW/glfw3native.h:102,
                 from /home/thanos/CLionProjects/webgpu-cross-platform-demo/window.h:17,
                 from /home/thanos/CLionProjects/webgpu-cross-platform-demo/main.cpp:21:
/home/thanos/CLionProjects/webgpu-cross-platform-demo/main.cpp:427:65: error: expected unqualified-id before numeric constant
  427 |         depthStencilState.depthCompare = wgpu::CompareFunction::Always;
      |                                                                 ^~~~~~
/home/thanos/CLionProjects/webgpu-cross-platform-demo/main.cpp: In function ‘void run()’:
/home/thanos/CLionProjects/webgpu-cross-platform-demo/main.cpp:713:43: error: base operand of ‘->’ has non-pointer type ‘wgpu::Instance’
  713 |     surface = window_init_surface(instance->Get(), native_window);
      |                                           ^~
make[2]: *** [CMakeFiles/hello.dir/build.make:76: CMakeFiles/hello.dir/main.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:1363: CMakeFiles/hello.dir/all] Error 2
make: *** [Makefile:136: all] Error 2

I'll also give a try to the other repo as you suggested.