wasm-ld：unknown file type

[journey0726]

emcc info：

The operating system is ubantu，In the current directory，has some files:

When I use emcc : emcc -L . -ltest main.cpp -o main.html -s WASM=1 ，
Will report an error：wasm-ld: unknow file type: ./libtest.a(libtest.so),
My goal is to link main.cpp to the libtest.so file, and compile it into wasm.
I have found many solutions, but none have been resolved。

[sbc100]

Somehow it looks like a file called libtest.so is inside of the .a archive libtest.a.

What does llvm-ar t libtest.a report?

If it reports libtest.so, what type of file is libtest.so? You can use llvm-ar -x libtest.a to extract the files in the archive and then run file libtest.so to see what type of file libtest.so is.

[journey0726]

the emcc version is 3.1.34,the top picture has the emcc version.
If only the dynamic link library is available, then emcc cannot be used to compile a C++ program that uses the dynamic link library, right？

[sbc100]

Emscripten supports some forms of dynamic linking, but only with libraries compiled with emcc. So you would need a wasm version of all your libraries dependencies.

[journey0726]

Therefore, if you only have other versions of the dynamic link library, you cannot use emcc.
I see there is a dynamic link's example using dlopen on the official website,does this work?

[sbc100]

Yes, but again, the thing that you are opening (the dynamic library) must be built by emcc.

This is also true for all toolchains and platforms, you can't use dynamic libraries that are built for a different architecture.

[journey0726]

OK. I understand. Thank you very much!