Add initial WebAssembly toolchain implementation #315
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@swift-ci please test |
owenv
commented
Oct 17, 2020
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| // On ELF/WASM platforms there's no built in autolinking mechanism, so we | ||
| // pull the info we need from the .o files directly and pass them as an | ||
| // argument input file to the linker. | ||
| // FIXME: Also handle Cygwin and MinGW | ||
| guard inputs.count > 0 && targetTriple.objectFormat == .elf && lto == nil else { | ||
| guard inputs.count > 0 && | ||
| [.elf, .wasm].contains(targetTriple.objectFormat) && | ||
| lto == nil else { |
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From what I understand we probably won't need autolink-extract for Wasm long-term, but this is pretty harmless in the meantime
owenv
commented
Oct 17, 2020
| public func makeLinkerOutputFilename(moduleName: String, type: LinkOutputType) -> String { | ||
| switch type { | ||
| case .executable: | ||
| return moduleName |
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not sure if this should always have the .wasm extension
owenv
commented
Oct 17, 2020
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cc @kateinoigakukun and @MaxDesiatov too |
MaxDesiatov
approved these changes
Oct 17, 2020
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@swift-ci please test |
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@swift-ci please test |
DougGregor
approved these changes
Oct 18, 2020
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The latest push fixes a small merge conflict, but otherwise there aren't any changes @swift-ci please test |
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This is an initial implementation of a WebAssembly toolchain. It shares a lot of similarities with the GenericUnixToolchain, but it doesn't support dynamic libraries and other features like sanitizers, profiling, etc. Overall, there are enough differences that trying to subclass GenericUnixToolchain seemed potentially error-prone.
The functionality in this PR goes a bit beyond the current Wasm support in the main Swift repo. I tested this change by installing swift-driver into a toolchain snapshot from the SwiftWasm fork and then verifying I could compile a basic working program.