mirror of
https://github.com/ruby/ruby.git
synced 2025-08-23 21:14:23 +02:00
4c554096bf
The Ruby built for wasm cannot be execute without a WebAssembly runtime. ``` $ ruby-wasm32-wasi/usr/local/bin/ruby -e 'puts "a"' bash: ruby-wasm32-wasi/usr/local/bin/ruby: cannot execute binary file: Exec format error ``` Because the Ruby's file type is different from the one built normally, that is the `/usr/local/ruby-3.2.0-preview2/bin/ruby` below. ``` $ file ruby-wasm32-wasi/usr/local/bin/ruby ruby-wasm32-wasi/usr/local/bin/ruby: WebAssembly (wasm) binary module version 0x1 (MVP) $ file /usr/local/ruby-3.2.0-preview2/bin/ruby /usr/local/ruby-3.2.0-preview2/bin/ruby: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, BuildID[sha1]=a37822085e285c0971159982e7642dda88cea606, for GNU/Linux 3.2.0, with debug_info, not stripped ```
70 lines
2.5 KiB
Markdown
70 lines
2.5 KiB
Markdown
# WebAssembly / WASI port of Ruby
|
|
|
|
## How to cross-build
|
|
|
|
### Requirement
|
|
|
|
- Ruby (the same version as the building target version) (baseruby)
|
|
- GNU make
|
|
- [WASI SDK](https://github.com/WebAssembly/wasi-sdk) 14.0 or later
|
|
- [Binaryen](https://github.com/WebAssembly/binaryen) version 106 or later
|
|
- Linux or macOS build machine
|
|
|
|
### Steps
|
|
|
|
1. Download a prebuilt WASI SDK package from [WASI SDK release page](https://github.com/WebAssembly/wasi-sdk/releases).
|
|
2. Set `WASI_SDK_PATH` environment variable to the root directory of the WASI SDK package.
|
|
```console
|
|
$ export WASI_SDK_PATH=/path/to/wasi-sdk-X.Y
|
|
```
|
|
3. Download a prebuilt binaryen from [Binaryen release page](https://github.com/WebAssembly/binaryen/releases)
|
|
4. Set PATH environment variable to lookup binaryen tools
|
|
```console
|
|
$ export PATH=path/to/binaryen:$PATH
|
|
```
|
|
5. Download the latest `config.guess` with WASI support, and run `./autogen.sh` to generate configure when you
|
|
are building from the source checked out from Git repository
|
|
```console
|
|
$ ruby tool/downloader.rb -d tool -e gnu config.guess config.sub
|
|
$ ./autogen.sh
|
|
```
|
|
|
|
6. Configure
|
|
- You can select which extensions you want to build.
|
|
- If you got `Out of bounds memory access` while running the produced ruby, you may need to increase the maximum size of stack.
|
|
```console
|
|
$ ./configure LDFLAGS="-Xlinker -zstack-size=16777216" \
|
|
--host wasm32-unknown-wasi \
|
|
--with-destdir=./ruby-wasm32-wasi \
|
|
--with-static-linked-ext \
|
|
--with-ext=ripper,monitor
|
|
```
|
|
|
|
7. Make
|
|
```console
|
|
$ make install
|
|
```
|
|
|
|
Now you have a WASI compatible ruby binary. You can run it by any WebAssembly runtime like [`wasmtime`](https://github.com/bytecodealliance/wasmtime), [`wasmer`](https://github.com/wasmerio/wasmer), [Node.js](https://nodejs.org/api/wasi.html), or browser with [WASI polyfill](https://www.npmjs.com/package/@wasmer/wasi).
|
|
|
|
Note: it may take a long time (~20 sec) for the first time for JIT compilation
|
|
|
|
```
|
|
$ wasmtime ruby-wasm32-wasi/usr/local/bin/ruby --mapdir /::./ruby-wasm32-wasi/ -- -e 'puts RUBY_PLATFORM'
|
|
wasm32-wasi
|
|
```
|
|
|
|
Note: you cannot run the built ruby without a WebAssembly runtime, because of the difference of the binary file type.
|
|
|
|
```
|
|
$ ruby-wasm32-wasi/usr/local/bin/ruby -e 'puts "a"'
|
|
bash: ruby-wasm32-wasi/usr/local/bin/ruby: cannot execute binary file: Exec format error
|
|
|
|
$ file ruby-wasm32-wasi/usr/local/bin/ruby
|
|
ruby-wasm32-wasi/usr/local/bin/ruby: WebAssembly (wasm) binary module version 0x1 (MVP)
|
|
```
|
|
|
|
## Current Limitation
|
|
|
|
- No `Thread` support for now.
|
|
- Spawning a new process is not supported. e.g. `Kernel.spawn` and `Kernel.system`
|