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//===--------------- AutolinkExtractJob.swift - Swift Autolink Extract ----===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2019 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
import struct TSCBasic.RelativePath
// 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
extension Driver {
/*@_spi(Testing)*/ public var isAutolinkExtractJobNeeded: Bool {
[.elf, .wasm].contains(targetTriple.objectFormat) && lto == nil &&
linkerOutputType != nil
}
mutating func autolinkExtractJob(inputs: [TypedVirtualPath]) throws -> Job? {
guard let firstInput = inputs.first, isAutolinkExtractJobNeeded else {
return nil
}
var commandLine = [Job.ArgTemplate]()
// Put output in same place as first .o, following legacy driver.
// (See `constructInvocation(const AutolinkExtractJobAction` in `UnixToolChains.cpp`.)
let outputBasename = "\(moduleOutputInfo.name).autolink"
let dir = firstInput.file.parentDirectory
// Go through a bit of extra rigmarole to keep the "./" out of the name for
// the sake of the tests.
let output: VirtualPath = dir == .temporary(try RelativePath(validating: "."))
? try VirtualPath.createUniqueTemporaryFile(RelativePath(validating: outputBasename))
: dir.appending(component: outputBasename)
commandLine.append(contentsOf: inputs.map { .path($0.file) })
commandLine.appendFlag(.o)
commandLine.appendPath(output)
return Job(
moduleName: moduleOutputInfo.name,
kind: .autolinkExtract,
tool: try toolchain.resolvedTool(.swiftAutolinkExtract),
commandLine: commandLine,
inputs: inputs,
primaryInputs: [],
outputs: [.init(file: output.intern(), type: .autolink)]
)
}
}
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