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Added threads subsetting in emcc compiler model #18520
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memsharded
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Jun 24, 2025
memsharded
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Jun 25, 2025
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LGTM! But I'd like to see an integration test per toolchain 🙏
franramirez688
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Jun 25, 2025
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Looks great! Thanks! 👏
memsharded
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to memsharded/conan
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Jul 22, 2025
* Added threads subsetting on emcc compiler model * Fixed test * Return list instead * Update test/integration/toolchains/meson/test_mesontoolchain.py * Added integration tests to every toolchain * WIP fix windows tests * Fix windows autotools tests --------- Co-authored-by: James <[email protected]>
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Changelog: Feature: Added
threads
subsetting inemcc
compiler model.Docs: conan-io/docs#4115
Close #10088
The
emcc
compiler generates binaries that may be incompatible depending on whether threads are used. For more details, refer to the "Note" section in the Emscripten documentation: https://emscripten.org/docs/porting/pthreads.html#compiling-with-pthreads-enabled.According to https://emscripten.org/docs/api_reference/wasm_workers.html:
These two APIs are incompatible with each other.
This incompatibility necessitates the modeling of threading usage within the compiler's binary model. This allows us to distinguish between binaries compiled with threading and those compiled without it. Our goal is to integrate this capability built in, as we strive to provide first-class support for the Emscripten ecosystem.
develop
branch, documenting this one.