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LinkJob.swift
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LinkJob.swift
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//===--------------- LinkJob.swift - Swift Linking Job --------------------===//
//
// 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 TSCBasic
extension Driver {
/// Compute the output file for an image output.
private var outputFileForImage: VirtualPath {
if inputFiles.count == 1 && moduleOutputInfo.nameIsFallback && inputFiles[0].file != .standardInput {
return .relative(RelativePath(inputFiles[0].file.basenameWithoutExt))
}
let outputName =
toolchain.makeLinkerOutputFilename(moduleName: moduleOutputInfo.name,
type: linkerOutputType!)
return .relative(RelativePath(outputName))
}
/// Link the given inputs.
mutating func linkJob(inputs: [TypedVirtualPath]) throws -> Job {
var commandLine: [Job.ArgTemplate] = []
// Compute the final output file
let outputFile: VirtualPath
if let output = parsedOptions.getLastArgument(.o) {
outputFile = try VirtualPath(path: output.asSingle)
} else {
outputFile = outputFileForImage
}
// Defer to the toolchain for platform-specific linking
let toolPath = try toolchain.addPlatformSpecificLinkerArgs(
to: &commandLine,
parsedOptions: &parsedOptions,
linkerOutputType: linkerOutputType!,
inputs: inputs,
outputFile: outputFile,
shouldUseInputFileList: shouldUseInputFileList,
lto: lto,
sdkPath: self.absoluteSDKPath?.pathString,
sanitizers: enabledSanitizers,
targetInfo: frontendTargetInfo
)
// TODO: some, but not all, linkers support response files.
return Job(
moduleName: moduleOutputInfo.name,
kind: .link,
tool: .absolute(toolPath),
commandLine: commandLine,
inputs: inputs,
primaryInputs: [],
outputs: [.init(file: outputFile, type: .image)]
)
}
}