1 //! A "bare wasm" target representing a WebAssembly output that makes zero
2 //! assumptions about its environment.
4 //! The `wasm64-unknown-unknown` target is intended to encapsulate use cases
5 //! that do not rely on any imported functionality. The binaries generated are
6 //! entirely self-contained by default when using the standard library. Although
7 //! the standard library is available, most of it returns an error immediately
8 //! (e.g. trying to create a TCP stream or something like that).
11 use super::{LinkerFlavor, LldFlavor, Target};
13 pub fn target() -> Target {
14 let mut options = wasm_base::options();
15 options.os = "unknown".to_string();
16 options.linker_flavor = LinkerFlavor::Lld(LldFlavor::Wasm);
17 let clang_args = options.pre_link_args.get_mut(&LinkerFlavor::Gcc).unwrap();
19 // Make sure clang uses LLD as its linker and is configured appropriately
21 clang_args.push("--target=wasm64-unknown-unknown".to_string());
23 // For now this target just never has an entry symbol no matter the output
24 // type, so unconditionally pass this.
25 clang_args.push("-Wl,--no-entry".to_string());
28 .get_mut(&LinkerFlavor::Lld(LldFlavor::Wasm))
30 .push("--no-entry".to_string());
33 llvm_target: "wasm64-unknown-unknown".to_string(),
35 data_layout: "e-m:e-p:64:64-i64:64-n32:64-S128".to_string(),
36 arch: "wasm64".to_string(),