Pass toolchain settings when using XCBuild

This is a follow-up to #3695, adding various other settings of the toolchain that we weren't yet correctly forwarding when XCBuild is being used.

rdar://82313817

Author: neonichu

Sources/XCBuildSupport/PIFBuilder.swift

@@ -27,13 +27,17 @@ public struct PIFBuilderParameters {
     /// Whether to create dylibs for dynamic library products.
     public let shouldCreateDylibForDynamicProducts: Bool
 
+    /// The path to the library directory of the active toolchain.
+    public let toolchainLibDir: AbsolutePath
+
     /// Creates a `PIFBuilderParameters` instance.
     /// - Parameters:
     ///   - enableTestability: Whether or not build for testability is enabled.
     ///   - shouldCreateDylibForDynamicProducts: Whether to create dylibs for dynamic library products.
-    public init(enableTestability: Bool, shouldCreateDylibForDynamicProducts: Bool) {
+    public init(enableTestability: Bool, shouldCreateDylibForDynamicProducts: Bool, toolchainLibDir: AbsolutePath) {
         self.enableTestability = enableTestability
         self.shouldCreateDylibForDynamicProducts = shouldCreateDylibForDynamicProducts
+        self.toolchainLibDir = toolchainLibDir
     }
 }
 
@@ -395,6 +399,10 @@ final class PackagePIFProjectBuilder: PIFProjectBuilder {
         settings[.SWIFT_FORCE_STATIC_LINK_STDLIB] = "NO"
         settings[.SWIFT_FORCE_DYNAMIC_LINK_STDLIB] = "YES"
 
+        if product.type == .executable || product.type == .test {
+            settings[.LIBRARY_SEARCH_PATHS] = ["$(inherited)", "\(parameters.toolchainLibDir.pathString)/swift/macosx"]
+        }
+
         // Tests can have a custom deployment target based on the minimum supported by XCTest.
         if mainTarget.underlyingTarget.type == .test {
             settings[.MACOSX_DEPLOYMENT_TARGET] = mainTarget.underlyingTarget.deploymentTarget(for: .macOS)

Sources/XCBuildSupport/XcodeBuildSystem.swift

@@ -153,9 +153,14 @@ public final class XcodeBuildSystem: SPMBuildCore.BuildSystem {
 
         // Generate a table of any overriding build settings.
         var settings: [String: String] = [:]
+        // An error with determining the override should not be fatal here.
+        settings["CC"] = try? buildParameters.toolchain.getClangCompiler().pathString
         // Always specify the path of the effective Swift compiler, which was determined in the same way as for the native build system.
         settings["SWIFT_EXEC"] = buildParameters.toolchain.swiftCompiler.pathString
-        settings["LIBRARY_SEARCH_PATHS"] = "$(inherited) \(buildParameters.toolchain.toolchainLibDir.pathString)/swift/macosx"
+        settings["LIBRARY_SEARCH_PATHS"] = "$(inherited) \(buildParameters.toolchain.toolchainLibDir.pathString)"
+        settings["OTHER_CFLAGS"] = "$(inherited) \(buildParameters.toolchain.extraCCFlags.joined(separator: " "))"
+        settings["OTHER_CPLUSPLUSFLAGS"] = "$(inherited) \(buildParameters.toolchain.extraCPPFlags.joined(separator: " "))"
+        settings["OTHER_SWIFT_FLAGS"] = "$(inherited) \(buildParameters.toolchain.extraSwiftCFlags.joined(separator: " "))"
         // Optionally also set the list of architectures to build for.
         if !buildParameters.archs.isEmpty {
             settings["ARCHS"] = buildParameters.archs.joined(separator: " ")
@@ -164,7 +169,7 @@ public final class XcodeBuildSystem: SPMBuildCore.BuildSystem {
         // Generate the build parameters.
         let params = XCBBuildParameters(
             configurationName: buildParameters.configuration.xcbuildName,
-            overrides: .init(commandLine: .init(table: settings)),
+            overrides: .init(synthesized: .init(table: settings)),
             activeRunDestination: runDestination
         )
 
@@ -226,7 +231,7 @@ struct XCBBuildParameters: Encodable {
     }
 
     struct SettingsOverride: Encodable {
-        var commandLine: XCBSettingsTable? = nil
+        var synthesized: XCBSettingsTable? = nil
     }
 
     var configurationName: String
@@ -247,7 +252,8 @@ extension PIFBuilderParameters {
     public init(_ buildParameters: BuildParameters) {
         self.init(
             enableTestability: buildParameters.enableTestability,
-            shouldCreateDylibForDynamicProducts: buildParameters.shouldCreateDylibForDynamicProducts
+            shouldCreateDylibForDynamicProducts: buildParameters.shouldCreateDylibForDynamicProducts,
+            toolchainLibDir: buildParameters.toolchain.toolchainLibDir
         )
     }
 }

Tests/XCBuildSupportTests/PIFBuilderTests.swift

@@ -2295,7 +2295,8 @@ extension PIFBuilderParameters {
     ) -> Self {
         PIFBuilderParameters(
             enableTestability: false,
-            shouldCreateDylibForDynamicProducts: shouldCreateDylibForDynamicProducts
+            shouldCreateDylibForDynamicProducts: shouldCreateDylibForDynamicProducts,
+            toolchainLibDir: AbsolutePath("/toolchain/lib")
         )
     }
 }