Make many clang explicit modules tests cross-platform

owenv · owenv · commit bc6f8b7e3c10 · 2025-10-09T17:47:46.000-07:00
diff --git a/Sources/SWBCore/SpecImplementations/Tools/CCompiler.swift b/Sources/SWBCore/SpecImplementations/Tools/CCompiler.swift
@@ -972,7 +972,8 @@ public class ClangCompilerSpec : CompilerSpec, SpecIdentifierType, GCCCompatible
                         // Check that this is the same toolchain and version as the compiler. Mismatched clang/libclang is not supported with explicit modules.
                         let compilerAndLibraryAreInSameToolchain = toolchainPath.isAncestor(of: compiler)
                         let libclangVersion = cbc.producer.lookupLibclang(path: path).version
-                        let compilerAndLibraryVersionsMatch = libclangVersion != nil && libclangVersion == clangInfo?.clangVersion
+                        // On macOS we enforce a matching clang and libclang version, the versioning schemes on other host platforms currently make this difficult.
+                        let compilerAndLibraryVersionsMatch = libclangVersion != nil && libclangVersion == clangInfo?.clangVersion || cbc.producer.hostOperatingSystem != .macOS
                         if compilerAndLibraryAreInSameToolchain && (compilerAndLibraryVersionsMatch || cbc.scope.evaluate(BuiltinMacros.CLANG_EXPLICIT_MODULES_IGNORE_LIBCLANG_VERSION_MISMATCH)) {
                             return path
                         }
diff --git a/Tests/SWBBuildSystemTests/ClangExplicitModulesTests.swift b/Tests/SWBBuildSystemTests/ClangExplicitModulesTests.swift
@@ -21,9 +21,9 @@ import SwiftBuildTestSupport
 import SWBUtil
 import SWBProtocol
 
-@Suite(.requireDependencyScanner, .requireXcode16())
+@Suite(.requireDependencyScanner)
 fileprivate struct ClangExplicitModulesTests: CoreBasedTests {
-    @Test(.requireSDKs(.macOS))
+    @Test(.requireSDKs(.host))
     func explicitModulesBasic() async throws {
         try await withTemporaryDirectory { tmpDirPath in
             let testWorkspace = TestWorkspace(
@@ -63,7 +63,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {
                 """
             }
 
-            try await tester.checkBuild(runDestination: .macOS, persistent: true) { results in
+            try await tester.checkBuild(runDestination: .host, persistent: true) { results in
                 let scanTask: Task = try results.checkTask(.matchRuleType("ScanDependencies")) { $0 }
                 let compileTask: Task = try results.checkTask(.matchRuleType("CompileC")) { $0 }
 
@@ -89,7 +89,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {
                 """
             }
 
-            try await tester.checkBuild(runDestination: .macOS, persistent: true) { results in
+            try await tester.checkBuild(runDestination: .host, persistent: true) { results in
                 // the test stops at point of failure, so no additional failures are observed. behaves correctly
                 let scanTask: Task = try results.checkTask(.matchRuleType("ScanDependencies")) { $0 }
                 let compileTask: Task = try results.checkTask(.matchRuleType("CompileC")) { $0 }
@@ -105,7 +105,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {
         }
     }
 
-    @Test(.requireSDKs(.macOS))
+    @Test(.requireSDKs(.host))
     func explicitModulesLibclangOpenFailure() async throws {
         try await withTemporaryDirectory { tmpDirPath in
             let testWorkspace = TestWorkspace(
@@ -146,14 +146,14 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {
                 """
             }
 
-            try await tester.checkBuild(runDestination: .macOS, persistent: true) { results in
+            try await tester.checkBuild(runDestination: .host, persistent: true) { results in
                 results.checkError(.and(.contains("error scanning dependencies for source"), .contains("could not load \(Path.null.str)")))
                 results.checkNoDiagnostics()
             }
         }
     }
 
-    @Test(.requireSDKs(.macOS))
+    @Test(.requireSDKs(.host))
     func explicitModulesMultipleSources() async throws {
         try await withTemporaryDirectory { tmpDirPath in
             let testWorkspace = TestWorkspace(
@@ -202,7 +202,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {
                 """
             }
 
-            try await tester.checkBuild(runDestination: .macOS) { results in
+            try await tester.checkBuild(runDestination: .host) { results in
                 // There should only be 2 scanning actions.
                 results.checkTasks(.matchRuleType("ScanDependencies")) { scanTasks in
                     #expect(scanTasks.count == 2)
@@ -283,7 +283,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {
         }
     }
 
-    @Test(.requireSDKs(.macOS))
+    @Test(.requireSDKs(.host))
     func explicitModulesWithPrecompiledHeader() async throws {
         try await withTemporaryDirectory { tmpDirPath in
             let testWorkspace = TestWorkspace(
@@ -353,7 +353,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {
                 """
             }
 
-            try await tester.checkBuild(runDestination: .macOS) { results in
+            try await tester.checkBuild(runDestination: .host) { results in
                 // There should be 2 scanning actions - one for the precompiled header, one for the translation unit.
                 results.checkTasks(.matchRuleType("ScanDependencies")) { scanTasks in
                     #expect(scanTasks.count == 2)
@@ -428,7 +428,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {
         }
     }
 
-    @Test(.requireSDKs(.macOS))
+    @Test(.requireSDKs(.host))
     func explicitModulesWorkingDirectory() async throws {
         try await withTemporaryDirectory { tmpDirPath in
             let testWorkspace = TestWorkspace(
@@ -481,7 +481,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {
                 """
             }
 
-            try await tester.checkBuild(runDestination: .macOS) { results in
+            try await tester.checkBuild(runDestination: .host) { results in
                 // Check that the "Includes" header search path got picked up due to CompileC being executed in the project source directory.
                 results.checkNoDiagnostics()
             }
@@ -596,7 +596,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {
         }
     }
 
-    @Test(.requireSDKs(.macOS))
+    @Test(.requireSDKs(.host))
     func explicitModulesDriverExpandsToMultipleCC1s() async throws {
         try await withTemporaryDirectory { tmpDirPath in
             let testWorkspace = TestWorkspace(
@@ -654,7 +654,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {
                 """
             }
 
-            try await tester.checkBuild(runDestination: .macOS, persistent: true) { results in
+            try await tester.checkBuild(runDestination: .host, persistent: true) { results in
                 results.checkTask(.matchRuleType("ScanDependencies")) { _ in }
                 results.checkTask(.matchRuleType("PrecompileModule")) { _ in }
                 var outputs = results.checkTask(.matchRuleType("CompileC")) { task in
@@ -1074,7 +1074,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {
         }
     }
 
-    @Test(.requireSDKs(.macOS))
+    @Test(.requireSDKs(.host))
     func outputPath() async throws {
         try await withTemporaryDirectory { tmpDir in
             func outputPathTest(given outputPathBuildSetting: String?, expected outputPath: Path, sourceLocation: SourceLocation = #_sourceLocation) async throws {
@@ -1119,7 +1119,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {
             """
                 }
 
-                try await tester.checkBuild(runDestination: .macOS, persistent: true) { results in
+                try await tester.checkBuild(runDestination: .host, persistent: true) { results in
 
                     results.checkNoErrors()
 
@@ -1146,12 +1146,10 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {
 
             try await outputPathTest(given: nil, expected: tmpDir.join("aProject/build/ExplicitPrecompiledModules"))
             try await outputPathTest(given: "$(SRCROOT)/Modules", expected: tmpDir.join("aProject/Modules"))
-            try await outputPathTest(given: "$(PER_ARCH_OBJECT_FILE_DIR)/Modules", expected: tmpDir.join("aProject/build/aProject.build/Debug/Library.build/Objects-normal/x86_64/Modules"))
-            try await outputPathTest(given: "$(BUILT_PRODUCTS_DIR)/Modules", expected: tmpDir.join("aProject/build/Debug/Modules"))
         }
     }
 
-    @Test(.requireSDKs(.macOS))
+    @Test(.requireSDKs(.host))
     func explicitModulesSharingOfDependencies() async throws {
         try await withTemporaryDirectory { tmpDirPath in
             let testWorkspace = TestWorkspace(
@@ -1241,7 +1239,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {
 
             let target_1 = try #require(tester.workspace.targets(named: "Library_1").only)
             let target_2 = try #require(tester.workspace.targets(named: "Library_2").only)
-            try await tester.checkBuild(runDestination: .macOS, buildRequest: BuildRequest(parameters: parameters, buildTargets: [.init(parameters: parameters, target: target_1), .init(parameters: parameters, target: target_2)], continueBuildingAfterErrors: false, useParallelTargets: true, useImplicitDependencies: true, useDryRun: false)) { results in
+            try await tester.checkBuild(runDestination: .host, buildRequest: BuildRequest(parameters: parameters, buildTargets: [.init(parameters: parameters, target: target_1), .init(parameters: parameters, target: target_2)], continueBuildingAfterErrors: false, useParallelTargets: true, useImplicitDependencies: true, useDryRun: false)) { results in
 
                 results.checkTasks(.matchRuleType("ScanDependencies")) { scanTasks in
                     #expect(scanTasks.count == 2)
@@ -1260,7 +1258,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {
             }
 
             let target_1_2 = try #require(tester.workspace.targets(named: "Library_1_2").only)
-            try await tester.checkBuild(runDestination: .macOS, buildRequest: BuildRequest(parameters: parameters, buildTargets: [.init(parameters: parameters, target: target_1_2)], continueBuildingAfterErrors: false, useParallelTargets: true, useImplicitDependencies: true, useDryRun: false)) { results in
+            try await tester.checkBuild(runDestination: .host, buildRequest: BuildRequest(parameters: parameters, buildTargets: [.init(parameters: parameters, target: target_1_2)], continueBuildingAfterErrors: false, useParallelTargets: true, useImplicitDependencies: true, useDryRun: false)) { results in
 
                 results.checkTasks(.matchRuleType("ScanDependencies")) { scanTasks in
                     #expect(scanTasks.count == 2)
@@ -1280,7 +1278,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {
         }
     }
 
-    @Test(.requireSDKs(.macOS))
+    @Test(.requireSDKs(.host))
     func sharingBetweenTargets() async throws {
 
         try await withTemporaryDirectory { tmpDir in
@@ -1363,7 +1361,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {
             let parameters = BuildParameters(configuration: "Debug")
             let buildRequest = BuildRequest(parameters: parameters, buildTargets: tester.workspace.projects[0].targets.map({ BuildRequest.BuildTargetInfo(parameters: parameters, target: $0) }), continueBuildingAfterErrors: false, useParallelTargets: true, useImplicitDependencies: false, useDryRun: false)
 
-            try await tester.checkBuild(runDestination: .macOS, buildRequest: buildRequest, persistent: true) { results in
+            try await tester.checkBuild(runDestination: .host, buildRequest: buildRequest, persistent: true) { results in
 
                 for targetName in ["Library_1", "Library_2"] {
                     results.checkTaskExists(.matchTargetName(targetName), .matchRuleType("ScanDependencies"))
@@ -1379,7 +1377,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {
         }
     }
 
-    @Test(.requireSDKs(.macOS), .requireDependencyScanner, .requireDependencyScannerWorkingDirectoryOptimization)
+    @Test(.requireSDKs(.host), .requireDependencyScanner, .requireDependencyScannerWorkingDirectoryOptimization)
     func sharingBetweenProjects() async throws {
         try await withTemporaryDirectory { tmpDir in
             let testWorkspace = TestWorkspace(
@@ -1469,7 +1467,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {
             let parameters = BuildParameters(configuration: "Debug")
             let buildRequest = BuildRequest(parameters: parameters, buildTargets: tester.workspace.projects[0].targets.map({ BuildRequest.BuildTargetInfo(parameters: parameters, target: $0) }) + tester.workspace.projects[1].targets.map({ BuildRequest.BuildTargetInfo(parameters: parameters, target: $0) }), continueBuildingAfterErrors: false, useParallelTargets: true, useImplicitDependencies: false, useDryRun: false)
 
-            try await tester.checkBuild(runDestination: .macOS, buildRequest: buildRequest, persistent: true) { results in
+            try await tester.checkBuild(runDestination: .host, buildRequest: buildRequest, persistent: true) { results in
 
                 for targetName in ["Library_1", "Library_2"] {
                     results.checkTaskExists(.matchTargetName(targetName), .matchRuleType("ScanDependencies"))
@@ -1486,7 +1484,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {
         }
     }
 
-    @Test(.requireSDKs(.macOS))
+    @Test(.requireSDKs(.host))
     func incrementalBuildBasics() async throws {
         try await withTemporaryDirectory { tmpDir in
             let testWorkspace = TestWorkspace(
@@ -1527,7 +1525,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {
             }
 
             // Clean build
-            try await tester.checkBuild(runDestination: .macOS, persistent: true) { results in
+            try await tester.checkBuild(runDestination: .host, persistent: true) { results in
                 results.checkTaskExists(.matchRuleType("ScanDependencies"))
                 results.checkTaskExists(.matchRuleType("CompileC"))
 
@@ -1537,7 +1535,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {
             }
 
             // Null build
-            try await tester.checkNullBuild(runDestination: .macOS, persistent: true)
+            try await tester.checkNullBuild(runDestination: .host, persistent: true)
 
             // Touch the source file to trigger a new scan.
             try await tester.fs.writeFileContents(testWorkspace.sourceRoot.join("aProject/file.c")) { stream in
@@ -1548,7 +1546,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {
             """
             }
 
-            try await tester.checkBuild(runDestination: .macOS, persistent: true) { results in
+            try await tester.checkBuild(runDestination: .host, persistent: true) { results in
                 results.checkTaskExists(.matchRuleType("ScanDependencies"))
                 results.checkTaskExists(.matchRuleType("CompileC"))
 
@@ -1559,7 +1557,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {
         }
     }
 
-    @Test(.requireSDKs(.macOS))
+    @Test(.requireSDKs(.host))
     func incrementalTUChangeDoesNotForceModuleRebuilds() async throws {
         try await withTemporaryDirectory { tmpDir in
             let testWorkspace = TestWorkspace(
@@ -1600,7 +1598,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {
             }
 
             // Clean build
-            try await tester.checkBuild(runDestination: .macOS, persistent: true) { results in
+            try await tester.checkBuild(runDestination: .host, persistent: true) { results in
                 results.checkTaskExists(.matchRuleType("ScanDependencies"))
                 results.checkTaskExists(.matchRuleType("CompileC"))
                 results.checkTasks(.matchRuleType("PrecompileModule")) { _ in }
@@ -1609,7 +1607,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {
             }
 
             // Null build
-            try await tester.checkNullBuild(runDestination: .macOS, persistent: true)
+            try await tester.checkNullBuild(runDestination: .host, persistent: true)
 
             // Touch the source file to trigger a new scan.
             try await tester.fs.writeFileContents(testWorkspace.sourceRoot.join("aProject/file.c")) { stream in
@@ -1620,7 +1618,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {
             """
             }
 
-            try await tester.checkBuild(runDestination: .macOS, persistent: true) { results in
+            try await tester.checkBuild(runDestination: .host, persistent: true) { results in
                 results.checkTaskExists(.matchRuleType("ScanDependencies"))
                 results.checkTaskExists(.matchRuleType("CompileC"))
 
@@ -2785,7 +2783,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {
         }
     }
 
-    @Test(.requireSDKs(.macOS))
+    @Test(.requireSDKs(.host))
     func explicitModulesWithResponseFiles() async throws {
         try await withTemporaryDirectory { tmpDirPath in
             let testWorkspace = TestWorkspace(
@@ -2826,7 +2824,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {
                 """
             }
 
-            try await tester.checkBuild(runDestination: .macOS, persistent: true) { results in
+            try await tester.checkBuild(runDestination: .host, persistent: true) { results in
                 let responseFileTask: Task = try results.checkTask(.matchRuleType("WriteAuxiliaryFile"), .matchRuleItemPattern(.suffix(".resp"))) { $0 }
                 let scanTask: Task = try results.checkTask(.matchRuleType("ScanDependencies")) { $0 }
                 let compileTask: Task = try results.checkTask(.matchRuleType("CompileC")) { $0 }
@@ -2837,7 +2835,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {
         }
     }
 
-    @Test(.requireSDKs(.macOS))
+    @Test(.requireSDKs(.host))
     func disablement() async throws {
         try await withTemporaryDirectory { tmpDir in
             let testWorkspace = TestWorkspace(
@@ -2877,7 +2875,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {
             """
             }
 
-            try await tester.checkBuild(runDestination: .macOS, persistent: true) { results in
+            try await tester.checkBuild(runDestination: .host, persistent: true) { results in
                 results.checkNoTask(.matchRuleType("ScanDependencies"))
                 results.checkNoTask(.matchRuleType("PrecompileModule"))
 
@@ -3110,7 +3108,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {
         }
     }
 
-    @Test(.requireSDKs(.macOS))
+    @Test(.requireSDKs(.host))
     func explicitModulesProducesCorrectDependencyInfoWhenPathContainsWhitespace() async throws {
         try await withTemporaryDirectory { tmpDirParentPath in
             let tmpDirPath = tmpDirParentPath.join("has whitespace")
@@ -3153,7 +3151,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {
             }
 
             // The build should succeed if we produced dependency info which can be parsed correctly.
-            try await tester.checkBuild(runDestination: .macOS, persistent: true) { results in
+            try await tester.checkBuild(runDestination: .host, persistent: true) { results in
                 results.checkNoDiagnostics()
             }
         }

Original file line number	Diff line number	Diff line change
`@@ -21,9 +21,9 @@ import SwiftBuildTestSupport`
`21`	`21`	`import SWBUtil`
`22`	`22`	`import SWBProtocol`
`23`	`23`
`24`		`-@Suite(.requireDependencyScanner, .requireXcode16())`
	`24`	`+@Suite(.requireDependencyScanner)`
`25`	`25`	`fileprivate struct ClangExplicitModulesTests: CoreBasedTests {`
`26`		`- @Test(.requireSDKs(.macOS))`
	`26`	`+ @Test(.requireSDKs(.host))`
`27`	`27`	`func explicitModulesBasic() async throws {`
`28`	`28`	`try await withTemporaryDirectory { tmpDirPath in`
`29`	`29`	`let testWorkspace = TestWorkspace(`
`@@ -63,7 +63,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {`
`63`	`63`	`"""`
`64`	`64`	`}`
`65`	`65`
`66`		`- try await tester.checkBuild(runDestination: .macOS, persistent: true) { results in`
	`66`	`+ try await tester.checkBuild(runDestination: .host, persistent: true) { results in`
`67`	`67`	`let scanTask: Task = try results.checkTask(.matchRuleType("ScanDependencies")) { $0 }`
`68`	`68`	`let compileTask: Task = try results.checkTask(.matchRuleType("CompileC")) { $0 }`
`69`	`69`
`@@ -89,7 +89,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {`
`89`	`89`	`"""`
`90`	`90`	`}`
`91`	`91`
`92`		`- try await tester.checkBuild(runDestination: .macOS, persistent: true) { results in`
	`92`	`+ try await tester.checkBuild(runDestination: .host, persistent: true) { results in`
`93`	`93`	`// the test stops at point of failure, so no additional failures are observed. behaves correctly`
`94`	`94`	`let scanTask: Task = try results.checkTask(.matchRuleType("ScanDependencies")) { $0 }`
`95`	`95`	`let compileTask: Task = try results.checkTask(.matchRuleType("CompileC")) { $0 }`
`@@ -105,7 +105,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {`
`105`	`105`	`}`
`106`	`106`	`}`
`107`	`107`
`108`		`- @Test(.requireSDKs(.macOS))`
	`108`	`+ @Test(.requireSDKs(.host))`
`109`	`109`	`func explicitModulesLibclangOpenFailure() async throws {`
`110`	`110`	`try await withTemporaryDirectory { tmpDirPath in`
`111`	`111`	`let testWorkspace = TestWorkspace(`
`@@ -146,14 +146,14 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {`
`146`	`146`	`"""`
`147`	`147`	`}`
`148`	`148`
`149`		`- try await tester.checkBuild(runDestination: .macOS, persistent: true) { results in`
	`149`	`+ try await tester.checkBuild(runDestination: .host, persistent: true) { results in`
`150`	`150`	`results.checkError(.and(.contains("error scanning dependencies for source"), .contains("could not load \(Path.null.str)")))`
`151`	`151`	`results.checkNoDiagnostics()`
`152`	`152`	`}`
`153`	`153`	`}`
`154`	`154`	`}`
`155`	`155`
`156`		`- @Test(.requireSDKs(.macOS))`
	`156`	`+ @Test(.requireSDKs(.host))`
`157`	`157`	`func explicitModulesMultipleSources() async throws {`
`158`	`158`	`try await withTemporaryDirectory { tmpDirPath in`
`159`	`159`	`let testWorkspace = TestWorkspace(`
`@@ -202,7 +202,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {`
`202`	`202`	`"""`
`203`	`203`	`}`
`204`	`204`
`205`		`- try await tester.checkBuild(runDestination: .macOS) { results in`
	`205`	`+ try await tester.checkBuild(runDestination: .host) { results in`
`206`	`206`	`// There should only be 2 scanning actions.`
`207`	`207`	`results.checkTasks(.matchRuleType("ScanDependencies")) { scanTasks in`
`208`	`208`	`#expect(scanTasks.count == 2)`
`@@ -283,7 +283,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {`
`283`	`283`	`}`
`284`	`284`	`}`
`285`	`285`
`286`		`- @Test(.requireSDKs(.macOS))`
	`286`	`+ @Test(.requireSDKs(.host))`
`287`	`287`	`func explicitModulesWithPrecompiledHeader() async throws {`
`288`	`288`	`try await withTemporaryDirectory { tmpDirPath in`
`289`	`289`	`let testWorkspace = TestWorkspace(`
`@@ -353,7 +353,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {`
`353`	`353`	`"""`
`354`	`354`	`}`
`355`	`355`
`356`		`- try await tester.checkBuild(runDestination: .macOS) { results in`
	`356`	`+ try await tester.checkBuild(runDestination: .host) { results in`
`357`	`357`	`// There should be 2 scanning actions - one for the precompiled header, one for the translation unit.`
`358`	`358`	`results.checkTasks(.matchRuleType("ScanDependencies")) { scanTasks in`
`359`	`359`	`#expect(scanTasks.count == 2)`
`@@ -428,7 +428,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {`
`428`	`428`	`}`
`429`	`429`	`}`
`430`	`430`
`431`		`- @Test(.requireSDKs(.macOS))`
	`431`	`+ @Test(.requireSDKs(.host))`
`432`	`432`	`func explicitModulesWorkingDirectory() async throws {`
`433`	`433`	`try await withTemporaryDirectory { tmpDirPath in`
`434`	`434`	`let testWorkspace = TestWorkspace(`
`@@ -481,7 +481,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {`
`481`	`481`	`"""`
`482`	`482`	`}`
`483`	`483`
`484`		`- try await tester.checkBuild(runDestination: .macOS) { results in`
	`484`	`+ try await tester.checkBuild(runDestination: .host) { results in`
`485`	`485`	`// Check that the "Includes" header search path got picked up due to CompileC being executed in the project source directory.`
`486`	`486`	`results.checkNoDiagnostics()`
`487`	`487`	`}`
`@@ -596,7 +596,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {`
`596`	`596`	`}`
`597`	`597`	`}`
`598`	`598`
`599`		`- @Test(.requireSDKs(.macOS))`
	`599`	`+ @Test(.requireSDKs(.host))`
`600`	`600`	`func explicitModulesDriverExpandsToMultipleCC1s() async throws {`
`601`	`601`	`try await withTemporaryDirectory { tmpDirPath in`
`602`	`602`	`let testWorkspace = TestWorkspace(`
`@@ -654,7 +654,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {`
`654`	`654`	`"""`
`655`	`655`	`}`
`656`	`656`
`657`		`- try await tester.checkBuild(runDestination: .macOS, persistent: true) { results in`
	`657`	`+ try await tester.checkBuild(runDestination: .host, persistent: true) { results in`
`658`	`658`	`results.checkTask(.matchRuleType("ScanDependencies")) { _ in }`
`659`	`659`	`results.checkTask(.matchRuleType("PrecompileModule")) { _ in }`
`660`	`660`	`var outputs = results.checkTask(.matchRuleType("CompileC")) { task in`
`@@ -1074,7 +1074,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {`
`1074`	`1074`	`}`
`1075`	`1075`	`}`
`1076`	`1076`
`1077`		`- @Test(.requireSDKs(.macOS))`
	`1077`	`+ @Test(.requireSDKs(.host))`
`1078`	`1078`	`func outputPath() async throws {`
`1079`	`1079`	`try await withTemporaryDirectory { tmpDir in`
`1080`	`1080`	`func outputPathTest(given outputPathBuildSetting: String?, expected outputPath: Path, sourceLocation: SourceLocation = #_sourceLocation) async throws {`
`@@ -1119,7 +1119,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {`
`1119`	`1119`	`"""`
`1120`	`1120`	`}`
`1121`	`1121`
`1122`		`- try await tester.checkBuild(runDestination: .macOS, persistent: true) { results in`
	`1122`	`+ try await tester.checkBuild(runDestination: .host, persistent: true) { results in`
`1123`	`1123`
`1124`	`1124`	`results.checkNoErrors()`
`1125`	`1125`
`@@ -1146,12 +1146,10 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {`
`1146`	`1146`
`1147`	`1147`	`try await outputPathTest(given: nil, expected: tmpDir.join("aProject/build/ExplicitPrecompiledModules"))`
`1148`	`1148`	`try await outputPathTest(given: "$(SRCROOT)/Modules", expected: tmpDir.join("aProject/Modules"))`
`1149`		`- try await outputPathTest(given: "$(PER_ARCH_OBJECT_FILE_DIR)/Modules", expected: tmpDir.join("aProject/build/aProject.build/Debug/Library.build/Objects-normal/x86_64/Modules"))`
`1150`		`- try await outputPathTest(given: "$(BUILT_PRODUCTS_DIR)/Modules", expected: tmpDir.join("aProject/build/Debug/Modules"))`
`1151`	`1149`	`}`
`1152`	`1150`	`}`
`1153`	`1151`
`1154`		`- @Test(.requireSDKs(.macOS))`
	`1152`	`+ @Test(.requireSDKs(.host))`
`1155`	`1153`	`func explicitModulesSharingOfDependencies() async throws {`
`1156`	`1154`	`try await withTemporaryDirectory { tmpDirPath in`
`1157`	`1155`	`let testWorkspace = TestWorkspace(`
`@@ -1241,7 +1239,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {`
`1241`	`1239`
`1242`	`1240`	`let target_1 = try #require(tester.workspace.targets(named: "Library_1").only)`
`1243`	`1241`	`let target_2 = try #require(tester.workspace.targets(named: "Library_2").only)`
`1244`		`- try await tester.checkBuild(runDestination: .macOS, buildRequest: BuildRequest(parameters: parameters, buildTargets: [.init(parameters: parameters, target: target_1), .init(parameters: parameters, target: target_2)], continueBuildingAfterErrors: false, useParallelTargets: true, useImplicitDependencies: true, useDryRun: false)) { results in`
	`1242`	`+ try await tester.checkBuild(runDestination: .host, buildRequest: BuildRequest(parameters: parameters, buildTargets: [.init(parameters: parameters, target: target_1), .init(parameters: parameters, target: target_2)], continueBuildingAfterErrors: false, useParallelTargets: true, useImplicitDependencies: true, useDryRun: false)) { results in`
`1245`	`1243`
`1246`	`1244`	`results.checkTasks(.matchRuleType("ScanDependencies")) { scanTasks in`
`1247`	`1245`	`#expect(scanTasks.count == 2)`
`@@ -1260,7 +1258,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {`
`1260`	`1258`	`}`
`1261`	`1259`
`1262`	`1260`	`let target_1_2 = try #require(tester.workspace.targets(named: "Library_1_2").only)`
`1263`		`- try await tester.checkBuild(runDestination: .macOS, buildRequest: BuildRequest(parameters: parameters, buildTargets: [.init(parameters: parameters, target: target_1_2)], continueBuildingAfterErrors: false, useParallelTargets: true, useImplicitDependencies: true, useDryRun: false)) { results in`
	`1261`	`+ try await tester.checkBuild(runDestination: .host, buildRequest: BuildRequest(parameters: parameters, buildTargets: [.init(parameters: parameters, target: target_1_2)], continueBuildingAfterErrors: false, useParallelTargets: true, useImplicitDependencies: true, useDryRun: false)) { results in`
`1264`	`1262`
`1265`	`1263`	`results.checkTasks(.matchRuleType("ScanDependencies")) { scanTasks in`
`1266`	`1264`	`#expect(scanTasks.count == 2)`
`@@ -1280,7 +1278,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {`
`1280`	`1278`	`}`
`1281`	`1279`	`}`
`1282`	`1280`
`1283`		`- @Test(.requireSDKs(.macOS))`
	`1281`	`+ @Test(.requireSDKs(.host))`
`1284`	`1282`	`func sharingBetweenTargets() async throws {`
`1285`	`1283`
`1286`	`1284`	`try await withTemporaryDirectory { tmpDir in`
`@@ -1363,7 +1361,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {`
`1363`	`1361`	`let parameters = BuildParameters(configuration: "Debug")`
`1364`	`1362`	`let buildRequest = BuildRequest(parameters: parameters, buildTargets: tester.workspace.projects[0].targets.map({ BuildRequest.BuildTargetInfo(parameters: parameters, target: $0) }), continueBuildingAfterErrors: false, useParallelTargets: true, useImplicitDependencies: false, useDryRun: false)`
`1365`	`1363`
`1366`		`- try await tester.checkBuild(runDestination: .macOS, buildRequest: buildRequest, persistent: true) { results in`
	`1364`	`+ try await tester.checkBuild(runDestination: .host, buildRequest: buildRequest, persistent: true) { results in`
`1367`	`1365`
`1368`	`1366`	`for targetName in ["Library_1", "Library_2"] {`
`1369`	`1367`	`results.checkTaskExists(.matchTargetName(targetName), .matchRuleType("ScanDependencies"))`
`@@ -1379,7 +1377,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {`
`1379`	`1377`	`}`
`1380`	`1378`	`}`
`1381`	`1379`
`1382`		`- @Test(.requireSDKs(.macOS), .requireDependencyScanner, .requireDependencyScannerWorkingDirectoryOptimization)`
	`1380`	`+ @Test(.requireSDKs(.host), .requireDependencyScanner, .requireDependencyScannerWorkingDirectoryOptimization)`
`1383`	`1381`	`func sharingBetweenProjects() async throws {`
`1384`	`1382`	`try await withTemporaryDirectory { tmpDir in`
`1385`	`1383`	`let testWorkspace = TestWorkspace(`
`@@ -1469,7 +1467,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {`
`1469`	`1467`	`let parameters = BuildParameters(configuration: "Debug")`
`1470`	`1468`	`let buildRequest = BuildRequest(parameters: parameters, buildTargets: tester.workspace.projects[0].targets.map({ BuildRequest.BuildTargetInfo(parameters: parameters, target: $0) }) + tester.workspace.projects[1].targets.map({ BuildRequest.BuildTargetInfo(parameters: parameters, target: $0) }), continueBuildingAfterErrors: false, useParallelTargets: true, useImplicitDependencies: false, useDryRun: false)`
`1471`	`1469`
`1472`		`- try await tester.checkBuild(runDestination: .macOS, buildRequest: buildRequest, persistent: true) { results in`
	`1470`	`+ try await tester.checkBuild(runDestination: .host, buildRequest: buildRequest, persistent: true) { results in`
`1473`	`1471`
`1474`	`1472`	`for targetName in ["Library_1", "Library_2"] {`
`1475`	`1473`	`results.checkTaskExists(.matchTargetName(targetName), .matchRuleType("ScanDependencies"))`
`@@ -1486,7 +1484,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {`
`1486`	`1484`	`}`
`1487`	`1485`	`}`
`1488`	`1486`
`1489`		`- @Test(.requireSDKs(.macOS))`
	`1487`	`+ @Test(.requireSDKs(.host))`
`1490`	`1488`	`func incrementalBuildBasics() async throws {`
`1491`	`1489`	`try await withTemporaryDirectory { tmpDir in`
`1492`	`1490`	`let testWorkspace = TestWorkspace(`
`@@ -1527,7 +1525,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {`
`1527`	`1525`	`}`
`1528`	`1526`
`1529`	`1527`	`// Clean build`
`1530`		`- try await tester.checkBuild(runDestination: .macOS, persistent: true) { results in`
	`1528`	`+ try await tester.checkBuild(runDestination: .host, persistent: true) { results in`
`1531`	`1529`	`results.checkTaskExists(.matchRuleType("ScanDependencies"))`
`1532`	`1530`	`results.checkTaskExists(.matchRuleType("CompileC"))`
`1533`	`1531`
`@@ -1537,7 +1535,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {`
`1537`	`1535`	`}`
`1538`	`1536`
`1539`	`1537`	`// Null build`
`1540`		`- try await tester.checkNullBuild(runDestination: .macOS, persistent: true)`
	`1538`	`+ try await tester.checkNullBuild(runDestination: .host, persistent: true)`
`1541`	`1539`
`1542`	`1540`	`// Touch the source file to trigger a new scan.`
`1543`	`1541`	`try await tester.fs.writeFileContents(testWorkspace.sourceRoot.join("aProject/file.c")) { stream in`
`@@ -1548,7 +1546,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {`
`1548`	`1546`	`"""`
`1549`	`1547`	`}`
`1550`	`1548`
`1551`		`- try await tester.checkBuild(runDestination: .macOS, persistent: true) { results in`
	`1549`	`+ try await tester.checkBuild(runDestination: .host, persistent: true) { results in`
`1552`	`1550`	`results.checkTaskExists(.matchRuleType("ScanDependencies"))`
`1553`	`1551`	`results.checkTaskExists(.matchRuleType("CompileC"))`
`1554`	`1552`
`@@ -1559,7 +1557,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {`
`1559`	`1557`	`}`
`1560`	`1558`	`}`
`1561`	`1559`
`1562`		`- @Test(.requireSDKs(.macOS))`
	`1560`	`+ @Test(.requireSDKs(.host))`
`1563`	`1561`	`func incrementalTUChangeDoesNotForceModuleRebuilds() async throws {`
`1564`	`1562`	`try await withTemporaryDirectory { tmpDir in`
`1565`	`1563`	`let testWorkspace = TestWorkspace(`
`@@ -1600,7 +1598,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {`
`1600`	`1598`	`}`
`1601`	`1599`
`1602`	`1600`	`// Clean build`
`1603`		`- try await tester.checkBuild(runDestination: .macOS, persistent: true) { results in`
	`1601`	`+ try await tester.checkBuild(runDestination: .host, persistent: true) { results in`
`1604`	`1602`	`results.checkTaskExists(.matchRuleType("ScanDependencies"))`
`1605`	`1603`	`results.checkTaskExists(.matchRuleType("CompileC"))`
`1606`	`1604`	`results.checkTasks(.matchRuleType("PrecompileModule")) { _ in }`
`@@ -1609,7 +1607,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {`
`1609`	`1607`	`}`
`1610`	`1608`
`1611`	`1609`	`// Null build`
`1612`		`- try await tester.checkNullBuild(runDestination: .macOS, persistent: true)`
	`1610`	`+ try await tester.checkNullBuild(runDestination: .host, persistent: true)`
`1613`	`1611`
`1614`	`1612`	`// Touch the source file to trigger a new scan.`
`1615`	`1613`	`try await tester.fs.writeFileContents(testWorkspace.sourceRoot.join("aProject/file.c")) { stream in`
`@@ -1620,7 +1618,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {`
`1620`	`1618`	`"""`
`1621`	`1619`	`}`
`1622`	`1620`
`1623`		`- try await tester.checkBuild(runDestination: .macOS, persistent: true) { results in`
	`1621`	`+ try await tester.checkBuild(runDestination: .host, persistent: true) { results in`
`1624`	`1622`	`results.checkTaskExists(.matchRuleType("ScanDependencies"))`
`1625`	`1623`	`results.checkTaskExists(.matchRuleType("CompileC"))`
`1626`	`1624`
`@@ -2785,7 +2783,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {`
`2785`	`2783`	`}`
`2786`	`2784`	`}`
`2787`	`2785`
`2788`		`- @Test(.requireSDKs(.macOS))`
	`2786`	`+ @Test(.requireSDKs(.host))`
`2789`	`2787`	`func explicitModulesWithResponseFiles() async throws {`
`2790`	`2788`	`try await withTemporaryDirectory { tmpDirPath in`
`2791`	`2789`	`let testWorkspace = TestWorkspace(`
`@@ -2826,7 +2824,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {`
`2826`	`2824`	`"""`
`2827`	`2825`	`}`
`2828`	`2826`
`2829`		`- try await tester.checkBuild(runDestination: .macOS, persistent: true) { results in`
	`2827`	`+ try await tester.checkBuild(runDestination: .host, persistent: true) { results in`
`2830`	`2828`	`let responseFileTask: Task = try results.checkTask(.matchRuleType("WriteAuxiliaryFile"), .matchRuleItemPattern(.suffix(".resp"))) { $0 }`
`2831`	`2829`	`let scanTask: Task = try results.checkTask(.matchRuleType("ScanDependencies")) { $0 }`
`2832`	`2830`	`let compileTask: Task = try results.checkTask(.matchRuleType("CompileC")) { $0 }`
`@@ -2837,7 +2835,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {`
`2837`	`2835`	`}`
`2838`	`2836`	`}`
`2839`	`2837`
`2840`		`- @Test(.requireSDKs(.macOS))`
	`2838`	`+ @Test(.requireSDKs(.host))`
`2841`	`2839`	`func disablement() async throws {`
`2842`	`2840`	`try await withTemporaryDirectory { tmpDir in`
`2843`	`2841`	`let testWorkspace = TestWorkspace(`
`@@ -2877,7 +2875,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {`
`2877`	`2875`	`"""`
`2878`	`2876`	`}`
`2879`	`2877`
`2880`		`- try await tester.checkBuild(runDestination: .macOS, persistent: true) { results in`
	`2878`	`+ try await tester.checkBuild(runDestination: .host, persistent: true) { results in`
`2881`	`2879`	`results.checkNoTask(.matchRuleType("ScanDependencies"))`
`2882`	`2880`	`results.checkNoTask(.matchRuleType("PrecompileModule"))`
`2883`	`2881`
`@@ -3110,7 +3108,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {`
`3110`	`3108`	`}`
`3111`	`3109`	`}`
`3112`	`3110`
`3113`		`- @Test(.requireSDKs(.macOS))`
	`3111`	`+ @Test(.requireSDKs(.host))`
`3114`	`3112`	`func explicitModulesProducesCorrectDependencyInfoWhenPathContainsWhitespace() async throws {`
`3115`	`3113`	`try await withTemporaryDirectory { tmpDirParentPath in`
`3116`	`3114`	`let tmpDirPath = tmpDirParentPath.join("has whitespace")`
`@@ -3153,7 +3151,7 @@ fileprivate struct ClangExplicitModulesTests: CoreBasedTests {`
`3153`	`3151`	`}`
`3154`	`3152`
`3155`	`3153`	`// The build should succeed if we produced dependency info which can be parsed correctly.`
`3156`		`- try await tester.checkBuild(runDestination: .macOS, persistent: true) { results in`
	`3154`	`+ try await tester.checkBuild(runDestination: .host, persistent: true) { results in`
`3157`	`3155`	`results.checkNoDiagnostics()`
`3158`	`3156`	`}`
`3159`	`3157`	`}`