[wasm] error: undefined symbol: emscripten_webgpu_get_device #20422
Comments
|
This is probably caused by: |
|
mmm I see, any suggestions on how to generate the bc file then? If I use the .a extension it says that the file is not an static library. However I'm using emscripten 1.40... |
|
Ok @vargaz I managed to remove the invalid input file warning by compiling to bitcode the following source: #include <emscripten.h>
#include <emscripten/html5.h>
#include <emscripten/html5_webgpu.h>
extern "C"
{
WGPUDevice test_emscripten_webgpu_get_device(void);
void test_emscripten_set_main_loop(em_callback_func func, int fps, int simulate_infinite_loop);
void test_emscripten_cancel_main_loop(void);
}
WGPUDevice test_emscripten_webgpu_get_device(void)
{
return emscripten_webgpu_get_device();
}
void jemscripten_set_main_loop(em_callback_func func, int fps, int simulate_infinite_loop)
{
emscripten_set_main_loop(func, fps, simulate_infinite_loop);
}
void test_emscripten_cancel_main_loop(void)
{
emscripten_cancel_main_loop();
}The libWebGPU.bc file is generated with the following command: Now, if I do in c#: I can compile but javascript console says On the other hand, if I do (note not puting the bc extension): [DllImport("libWebGPU")]
private static extern void test_emscripten_set_main_loop(EMLoop func, int fps, int simulate_infinite_loop);Then ninja build fails: |
|
Try using libWebGPU.o as the file name, '.bc' is llvm bitcode, and emcc generates wasm object files by default. |
|
Thanks @vargaz , I compiled the .o with |
|
It doesn't complain about libWebGPU.bc anymore, so thats an improvement. |
|
Thanks again @vargaz , one of the two wasm-ld: error has desappeared. Any hint why the seccond still occur? |
|
Which library defines that function ? |
|
Its the main.cpp (above) I used to compile the file libWebGPU.o |
|
The functions might need to be marked with |
|
I had a typo on main.cpp, the functions defined in it are correctly linked. However I imported webgpu.h functions using DllImport to try to draw a triangle and I'm having pinvoke errors on all them like BTW I'm getting as well 14 warnings like below, but I think it is not related: Thank you very much @vargaz for taking the time. |
|
No idea about that. The warnings are harmless. |
|
So after some digging latests pinvoke errors were solved by moving to emscripten 1.40.1. It seems that I needed this PR emscripten-core/emscripten#11737 for webgpu to work. Other errors have arised now, but I think they are unrelated so I'm closing this. thanks! |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Hi, I've been trying to compile a .net project with emscripten/webgpu with no success, as the linker seems to not found the function "emscripten_webgpu_get_device". I'm compiling webgpu from emscrpten as a .bc file, then using packager to link everything toguether. Same approach with webgl has worked in the past.
Steps to Reproduce
emcc include/emscripten.h include/emscripten/html5_webgpu.h include/emscripten/html5.h -std=c++17 -s LEGALIZE_JS_FFI=0 -r -o libWebGPU.bc -s WASM=1 -s DISABLE_EXCEPTION_CATCHING=0mono $HOME/mono/sdks/wasm/packager.exe --emscripten-sdkdir=$HOME/mono/sdks/builds/toolchains/emsdk --enable-fs --mono-sdkdir=$HOME/mono/sdks/out --appdir=$HOME/.build/bin --builddir=$HOME/.build/obj --template=$HOME/.build/publish/runtime.js --linker --link-descriptor=$HOME/.build/aot-link-descriptor.xml --pinvoke-libs=libWebGPU --native-lib=libWebGPU.bc HelloWebGPUNet.Web.dllCurrent Behavior
Ninja log says that the function "emscripten_webgpu_get_device" is undefined
Expected Behavior
ninja build ends successfully.
On which platforms did you notice this
[ ] macOS
[x] Linux (WSL1)
[ ] Windows
Version Used:
commit 163f458 (HEAD -> master, origin/master, origin/HEAD)
Author: monojenkins jo.shields+jenkins@xamarin.com
Date: Wed Sep 16 11:24:16 2020 -0400
emcc (Emscripten gcc/clang-like replacement) 1.40.0 (634dfe9c7837119d3970c4145984b8f517e3e1ca)
The text was updated successfully, but these errors were encountered: