wat2wasm1

Usage

Overview

wat2wasm read a file in the wasm text format, check it for errors, and convert it to the wasm binary format.

The options are as follows:

--help

Print this help message

--version

Print version information

-v, --verbose

Use multiple times for more info

-d, --dump-module

Print a hexdump of the module to stdout

--disable-exceptions

Disable Experimental exception handling

--disable-mutable-globals

Disable Import/export mutable globals

--disable-saturating-float-to-int

Disable Saturating float-to-int operators

--disable-sign-extension

Disable Sign-extension operators

--disable-simd

Disable SIMD support

--enable-threads

Enable Threading support

--enable-function-references

Enable Typed function references

--disable-multi-value

Disable Multi-value

--disable-tail-call

Disable Tail-call support

--disable-bulk-memory

Disable Bulk-memory operations

--disable-reference-types

Disable Reference types (externref)

--disable-annotations

Disable Custom annotation syntax

--enable-code-metadata

Enable Code metadata

--enable-gc

Enable Garbage collection

--disable-memory64

Disable 64-bit memory

--disable-multi-memory

Disable Multi-memory

--disable-extended-const

Disable Extended constant expressions

--disable-relaxed-simd

Disable Relaxed SIMD

--enable-custom-page-sizes

Enable Custom page sizes

--enable-compact-imports

Enable Compact import section

--enable-wide-arithmetic

Enable Wide arithmetic

--enable-all

Enable all features

-o, --output=FILE

Output wasm binary file. Use "-" to write to stdout.

-r, --relocatable

Create a relocatable wasm binary (suitable for linking with e.g. lld)

--no-canonicalize-leb128s

Write all LEB128 sizes as 5-bytes instead of their minimal size

--debug-names

Write debug names to the generated binary file

Examples

parse test.wat and write to .wasm binary file with the same name

$ wat2wasm test.wat

parse test.wat and write to binary file test.wasm

$ wat2wasm test.wat -o test.wasm

parse spec-test.wast, and write verbose output to stdout (including the meaning of every byte)

$ wat2wasm spec-test.wast -v