Emit-module separately: Pass on the -parse-as-library flag to the frontend

rdar://74713625

Author: xymus

Sources/SwiftDriver/Jobs/EmitModuleJob.swift

@@ -76,6 +76,10 @@ extension Driver {
 
  addCommonModuleOptions(commandLine: &commandLine, outputs: &outputs, isMergeModule: false)
 
+ if parsedOptions.hasArgument(.parseAsLibrary, .emitLibrary) {
+ commandLine.appendFlag(.parseAsLibrary)
+ }
+
  commandLine.appendFlag(.o)
  commandLine.appendPath(moduleOutputPath)
 

Tests/SwiftDriverTests/SwiftDriverTests.swift

@@ -1817,6 +1817,7 @@ final class SwiftDriverTests: XCTestCase {
  let plannedJobs = try driver.planBuild()
  XCTAssertEqual(plannedJobs.count, 4)
  XCTAssertTrue(plannedJobs[0].tool.name.contains("swift"))
+ XCTAssertTrue(plannedJobs[0].commandLine.contains(.flag("-parse-as-library")))
  XCTAssertEqual(plannedJobs[0].outputs.count, 3)
  XCTAssertEqual(plannedJobs[0].outputs[0].file, .absolute(AbsolutePath("/foo/bar/Test.swiftmodule")))
  XCTAssertEqual(plannedJobs[0].outputs[1].file, .absolute(AbsolutePath("/foo/bar/Test.swiftdoc")))