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Add target to use LLVM wasm backend

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The new target is wasm32-experimental-emscripten. Adds a new
configuration option to opt in to building experimental LLVM backends
such as the WebAssembly backend. The target name was chosen to be
similar to the existing wasm32-unknown-emscripten target so that the
build and tests would work with minimal other code changes. When/if the
new target replaces the old target, simply renaming it should just work.
This commit is contained in:
Thomas Lively 2017-06-16 15:43:43 -07:00
parent fe7227f6c8
commit a1981a64a2
7 changed files with 77 additions and 1 deletions
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6
src/bootstrap/native.rs
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@ -86,6 +86,11 @@ pub fn llvm(build: &Build, target: &str) {
None => "X86;ARM;AArch64;Mips;PowerPC;SystemZ;JSBackend;MSP430;Sparc;NVPTX;Hexagon",
};
let llvm_exp_targets = match build.config.llvm_experimental_targets {
Some(ref s) => s,
None => "",
};
let assertions = if build.config.llvm_assertions {"ON"} else {"OFF"};
cfg.target(target)
@ -94,6 +99,7 @@ pub fn llvm(build: &Build, target: &str) {
.profile(profile)
.define("LLVM_ENABLE_ASSERTIONS", assertions)
.define("LLVM_TARGETS_TO_BUILD", llvm_targets)
.define("LLVM_EXPERIMENTAL_TARGETS_TO_BUILD", llvm_exp_targets)
.define("LLVM_INCLUDE_EXAMPLES", "OFF")
.define("LLVM_INCLUDE_TESTS", "OFF")
.define("LLVM_INCLUDE_DOCS", "OFF")