In my cross-platform headers (https://github.com/floooh/sokol) the emscripten code path is selected with a config-define, and the required Javascript code is embedded right in the C source files via emscripten's EM_JS macro (for instance here: https://github.com/floooh/sokol/blob/a662517e772d30b0889d68d83e7ec7cb395d89be/sokol_audio.h#L1294).
That way the emscripten version looks exactly the same to a user of that library as the other platform-specific code paths: just a bunch a C sources which are added to a project as usual, configured with preprocessor defines. I'm "delegating" the entire build system problem to the library user though. For my projects I'm using cmake with a custom toolchain file for emscripten, but the emscripten SDK also comes with one ( https://github.com/emscripten-core/emscripten/blob/master/cmake/Modules/Platform/Emscripten.cmake), so it should be possible to add only minimal emscripten-specific code to the project's standard CMakeLists.txt file (or maybe even none at all). Cheers, -Floh. On Tuesday, 31 March 2020 17:14:26 UTC+2, Chris Hafey wrote: > > Hi All, > > I would like to add a JS/WASM build of an existing C++ library ( > https://github.com/team-charls/charls) and am looking for best practices > on how to do so. Here are some options: > > 1) Create a new git repository that has the files files specific to the > JS/WASM build (e.g. CMakeLists.txt, js warpper, package.json, etc). In > this case, I would checkout the C++ library as a subfolder (or use git > submodules) in this new project. I like this because it is a clean > separation of concerns, but requires more work to keep things in sync. > 2) Add the JS/WASM files to the existing repository. This is nice because > its all one repository, but makes things more complicated for those that > just want the C/C++ version. In this case, I would create a package.json > to the root and create a "js" directory at the root which contains the > JS/WASM specific bits (including the resulting JS/WASM code) > 3) Combine the above two using a mono-repo pattern. > > Any thoughts would be appreciated, thanks! > > Chris > -- You received this message because you are subscribed to the Google Groups "emscripten-discuss" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/emscripten-discuss/0966d92f-0467-4970-b270-f2a815a523dc%40googlegroups.com.
