How to create .a library of c++ headers for wasm?

[riajain0412]

For using ICU4X in c++, we can build .a library with the following command cargo build -p icu_capi_staticlib --all-features. I want to build ICU4X for wasm so how can I create this static library for wasm?

[sffc]

Build icu_capi_cdylib with --target wasm32-unknown-unknown

For examples, see https://github.com/unicode-org/icu4x/tree/main/ffi/diplomat/js/examples

[riajain0412]

With this command .a files is not getting created.

[Manishearth]

Please be more specific about what you are trying to do, if you're linking to c++ you should look at the other example I posted

[riajain0412]

I'm trying to build ICU4X for wasm where I want to link .a(static library) to my sample. I was able to create .a library in case of macos but it is not getting created for wasm.

[Manishearth]

.a libraries do not contain headers.

Are you trying to call ICU4X from JS, or from C++? If you build with wasm32-unknown-emscripten you will get a .a file you can link to C++.

[riajain0412]

I'm trying to call it from C++.
.a file got created but it does not contain following symbol _ICU4XDataProvider_create_test

[Manishearth]

If you want to use it directly from JS, @sffc's answer is correct.

If you want to use it from C++ but your C++ application is being built to wasm, use the emscripten target instead. See https://github.com/unicode-org/icu4x/tree/main/ffi/diplomat/cpp/examples/fixeddecimal_wasm for an example.

[riajain0412]

.a libraries do not contain headers.

Are you trying to call ICU4X from JS, or from C++? If you build with wasm32-unknown-emscripten you will get a .a file you can link to C++.

Yeah right, I wrote it by mistake.