src/librustc_back/target/wasm32_unknown_emscripten.rs

   1 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 use super::{Target, TargetOptions};
  12 use super::emscripten_base::{cmd};
  13
  14 pub fn target() -> Result<Target, String> {
  15     let opts = TargetOptions {
  16         linker: cmd("emcc"),
  17         ar: cmd("emar"),
  18
  19         dynamic_linking: false,
  20         executables: true,
  21         // Today emcc emits two files - a .js file to bootstrap and
  22         // possibly interpret the wasm, and a .wasm file
  23         exe_suffix: ".js".to_string(),
  24         linker_is_gnu: true,
  25         allow_asm: false,
  26         obj_is_bitcode: true,
  27         max_atomic_width: Some(32),
  28         post_link_args: vec!["-s".to_string(), "BINARYEN=1".to_string(),
  29                              "-s".to_string(), "ERROR_ON_UNDEFINED_SYMBOLS=1".to_string()],
  30         target_family: Some("unix".to_string()),
  31         .. Default::default()
  32     };
  33     Ok(Target {
  34         llvm_target: "asmjs-unknown-emscripten".to_string(),
  35         target_endian: "little".to_string(),
  36         target_pointer_width: "32".to_string(),
  37         target_os: "emscripten".to_string(),
  38         target_env: "".to_string(),
  39         target_vendor: "unknown".to_string(),
  40         data_layout: "e-p:32:32-i64:64-v128:32:128-n32-S128".to_string(),
  41         arch: "wasm32".to_string(),
  42         options: opts,
  43     })
  44 }