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gh-84461: Build Emscripten with WASM BigInt support by tiran · Pull Request #94219 · python/cpython · GitHub

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gh-84461: Build Emscripten with WASM BigInt support #94219

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tiran merged 1 commit into from
Jun 24, 2022
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gh-84461: Build Emscripten with WASM BigInt support #94219

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4 changes: 3 additions & 1 deletion Tools/wasm/README.md
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Expand Up @@ -98,9 +98,11 @@ popd
```

```shell
node --experimental-wasm-threads --experimental-wasm-bulk-memory builddir/emscripten-node/python.js
node --experimental-wasm-threads --experimental-wasm-bulk-memory --experimental-wasm-bigint builddir/emscripten-node/python.js
```

(``--experimental-wasm-bigint`` is not needed with recent NodeJS versions)

# wasm32-emscripten limitations and issues

Emscripten before 3.1.8 has known bugs that can cause memory corruption and
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2 changes: 2 additions & 0 deletions configure
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3 changes: 3 additions & 0 deletions configure.ac
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Expand Up @@ -2028,6 +2028,9 @@ AS_CASE([$ac_sys_system],
dnl Start with 20 MB and allow to grow
AS_VAR_APPEND([LDFLAGS_NODIST], [" -sALLOW_MEMORY_GROWTH -sTOTAL_MEMORY=20971520"])

dnl map int64_t and uint64_t to JS bigint
AS_VAR_APPEND([LDFLAGS_NODIST], [" -sWASM_BIGINT"])

dnl Include file system support
AS_VAR_APPEND([LDFLAGS_NODIST], [" -sFORCE_FILESYSTEM -lidbfs.js -lnodefs.js -lproxyfs.js -lworkerfs.js"])

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