Basically, bake has no problems with static libraries, emscripten has almost zero support for -shared flag usage besides cmake There wasnt any need to update the codebase, just making sure emscriptten didnt panic when given warnings, not errors, solves the issue since changing the codebase according to emscriptten's desired sanity check results will always break the tests, as seen in my git commit history. @SanderMertens Finished the issue.

@SanderMertens added further testing, mock commands are a must for compatibility to bake for emscripten.

Bake also has no support for emscripten's backtracing, alongside with wasm system (had to use linux system via commands) alongside with execinfo.h (it was removed in 2014 from emscripten) and ptrace requirement (emscripten has its own backtracing) which is why we had to use mock ones, it compiles, however we cannot get full backtracing from test runs due to this incompability.

Added a step that shows js files are generated and shows:
test_core_flecs.js and test_core_flecs_static.js
test_meta_flecs.js and test_meta_flecs_static.js
test_query_flecs.js and test_query_flecs_static.js
test_collections_flecs.js and test_collections_flecs_static.js
test_addons_flecs.js and test_addons_flecs_static.js
test_cpp_flecs.js and test_cpp_flecs_static.js

as generated with their contents plus:
./CMakeFiles/3.31.5/CompilerIdC/a.out.js
./CMakeFiles/3.31.5/CompilerIdCXX/a.out.js

Looks promising! One nit, why do test run show up multiple times here? https://github.com/SanderMertens/flecs/actions/runs/13373357366/job/37346911375

Looks promising! One nit, why do test run show up multiple times here? https://github.com/SanderMertens/flecs/actions/runs/13373357366/job/37346911375

Ah! tee and cat were both used, that's why. I wanted to push all the buttons to get the output, fixing it.

@SanderMertens should be fixed.

LGTM! Thanks for the PR, the bounty should be added to your account soon, let me know if you run into any issues!