---
name: "futhark-wasm"
section: "1"
platform: "linux"
package: "futhark"
version: "0.25.27-1+b1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/futhark-wasm"
---

# futhark-wasm(1)

compile Futhark to WebAssembly

## NAME

futhark-wasm - compile Futhark to WebAssembly

## SYNOPSIS

futhark wasm \[options...\] \<program.fut\>

## DESCRIPTION

**futhark wasm** translates a Futhark program to sequential WebAssembly code by first generating C as **futhark c**, and then using Emscripten (**emcc**).  This produces a **.js** file that allows the compiled code to be invoked from JavaScript.  Executables implement the Futhark server protocol and can be run with Node.js.

## OPTIONS

Accepts the same options as *futhark-c*.

## ENVIRONMENT VARIABLES

**CFLAGS**

Space-separated list of options passed to **emcc**.  Defaults to **-O3 -std=c99** if unset.

**EMCFLAGS**

Space-separated list of options passed to **emcc**.

## EXECUTABLE OPTIONS

The following options are accepted by executables generated by **futhark wasm**.

- **-h, --help**

  Print help text to standard output and exit.

- **-D, --debugging**

  Perform possibly expensive internal correctness checks and verbose logging.  Implies **-L**.

- **-L, --log**

  Print various low-overhead logging information to stderr while running.

## SEE ALSO

*futhark-c*, *futhark-wasm-multicore*

## COPYRIGHT

2013-2020, DIKU, University of Copenhagen