WASM-AS(1)

📦
version 131 · 3 versions
, in ubuntu stonking

✨ NAME ✨

wasm-as — assemble a .wat (WebAssembly text format) into a .wasm (WebAssembly binary

🌸 DESCRIPTION 🌸

Like bestie, this is THE tool. The one. Manual name is wasm-as and it lives on your system as a User Commands girly, okurrr 💅

wasm-as INFILE

What it does: assembles a .wat (WebAssembly text format) into a .wasm (WebAssembly binary format). That's it, that's the whole vibe. ✨

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🎀 wasm-as options 🎀

  • --output, -o — the output file, like where your lil baby .wasm goes 🍼
  • --validate, -v — control validation of the output module (keep an eye on it fr)
  • --debuginfo, -g — emit names section and debug info 🐛
  • --source-map, -sm — emit source map to the specified file 🗺️
  • --source-map-url, -su — use specified string as source map URL 🔗
  • --symbolmap, -s — emit a symbol map (indexes => names) 👑

🧚 Tool options 🧚

  • --mvp-features, -mvp — disable all non-MVP features, we're going vintage ✨
  • --all-features, -all — enable ALL the features, no crumbs left 🍓
  • --detect-features — (deprecated - this flag does nothing) 💀 literally a decorative flag, it does nothing, do not perceive it
  • --quiet, -q — emit less verbose output and hide trivial warnings 🤫
  • --experimental-poppy — parse wast files as Poppy IR for testing purposes 🧪
  • --emit-module-names — emit module names, even if not emitting the rest of the names section 📛
  • --enable-sign-ext — enable sign extension operations ➕
  • --disable-sign-ext — disable sign extension operations ➖
  • --enable-threads — enable atomic operations 🧵
  • --disable-threads — disable atomic operations 🧵
  • --enable-mutable-globals — enable mutable globals 🔄
  • --disable-mutable-globals — disable mutable globals 🔄
  • --enable-nontrapping-float-to-int — enable nontrapping float-to-int operations 🎣
  • --disable-nontrapping-float-to-int — disable nontrapping float-to-int operations 🎣
  • --enable-simd — enable SIMD operations and types 🏎️
  • --disable-simd — disable SIMD operations and types 🏎️
  • --enable-bulk-memory — enable bulk memory operations 📦
  • --disable-bulk-memory — disable bulk memory operations 📦
  • --enable-bulk-memory-opt — enable memory.copy and memory.fill 📋
  • --disable-bulk-memory-opt — disable memory.copy and memory.fill 📋
  • --enable-call-indirect-overlong — enable LEB encoding of call-indirect (Ignored for compatibility as it has no effect on Binaryen) 🙈
  • --disable-call-indirect-overlong — disable LEB encoding of call-indirect (Ignored for compatibility as it has no effect on Binaryen) 🙈
  • --enable-exception-handling — enable exception handling operations 🚨
  • --disable-exception-handling — disable exception handling operations 🚨
  • --enable-tail-call — enable tail call operations 🐕
  • --disable-tail-call — disable tail call operations 🐕
  • --enable-reference-types — enable reference types 🪞
  • --disable-reference-types — disable reference types 🪞
  • --enable-multivalue — enable multivalue functions 🎁
  • --disable-multivalue — disable multivalue functions 🎁
  • --enable-gc — enable garbage collection 🗑️
  • --disable-gc — disable garbage collection 🗑️
  • --enable-memory64 — enable memory64 🧠
  • --disable-memory64 — disable memory64 🧠
  • --enable-relaxed-simd — enable relaxed SIMD 😌
  • --disable-relaxed-simd — disable relaxed SIMD 😌
  • --enable-extended-const — enable extended const expressions 🧮
  • --disable-extended-const — disable extended const expressions 🧮
  • --enable-strings — enable strings 🧶
  • --disable-strings — disable strings 🧶
  • --enable-multimemory — enable multimemory 🗂️
  • --disable-multimemory — disable multimemory 🗂️
  • --enable-stack-switching — enable stack switching 🔀
  • --disable-stack-switching — disable stack switching 🔀
  • --enable-shared-everything — enable shared-everything threads 🤝
  • --disable-shared-everything — disable shared-everything threads 🤝
  • --enable-fp16 — enable float 16 operations 🌊
  • --disable-fp16 — disable float 16 operations 🌊
  • --enable-custom-descriptors — enable custom descriptors (RTTs) and exact references 🏷️
  • --disable-custom-descriptors — disable custom descriptors (RTTs) and exact references 🏷️
  • --enable-multibyte — enable multibyte array loads and stores 🧱
  • --disable-multibyte — disable multibyte array loads and stores 🧱
  • --enable-relaxed-atomics — enable acquire/release atomic memory operations ⚛️
  • --disable-relaxed-atomics — disable acquire/release atomic memory operations ⚛️
  • --enable-custom-page-sizes — enable custom page sizes 📄
  • --disable-custom-page-sizes — disable custom page sizes 📄
  • --enable-wide-arithmetic — enable wide arithmetic 🐘
  • --disable-wide-arithmetic — disable wide arithmetic 🐘
  • --enable-compact-imports — enable compact import section 📥
  • --disable-compact-imports — disable compact import section 📥
  • --enable-typed-function-references — Deprecated compatibility flag 💀
  • --disable-typed-function-references — Deprecated compatibility flag 💀
  • --no-validation, -n — disables validation, assumes inputs are correct 😳 bestie this one is living DANGEROUSLY, it just trusts you. If your input is wrong it will not save you.
  • --pass-arg, -pa — an argument passed along to optimization passes being run. Must be in the form KEY@VALUE. If KEY is the name of a pass then it applies to the closest instance of that pass before us. If KEY is not the name of a pass then it is a global option that applies to all pass instances that read it. 🎟️
  • --closed-world, -cw — assume code outside of the module does not inspect or interact with GC and function references, even if they are passed out. The outside may hold on to them and pass them back in, but not inspect their contents or call them. 🚪
  • --preserve-type-order — preserve the order of types from the input (useful for debugging and testing) 🔢
  • --generate-stack-ir — generate StackIR during writing 🏗️
  • --optimize-stack-ir — optimize StackIR during writing ✨
  • --print-stack-ir — print StackIR during writing 🖨️

🌈 General options 🌈

  • --version — output version information and exit 📌
  • --help, -h — show this help message and exit 🆘
  • --debug, -d — print debug information to stderr 🐞

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okay that's the whole page bestie, you ate that 💖

Sign-off moment: this is wasm-as version 131, dated August 2026, from the wasm-as man page. Go assemble something iconic. 🦋✨🎀

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