Add more support for building on Windows using SwiftPM

This continues from the support added in #7866.

While we can't build on Windows as-is due to exceeding the 65k exported symbol limit, in turn due to limitations in the build system, we can apply -static to all of the library targets which are known to be linked statically, in order to get that symbol count down.

Note that this uses unsafeFlags, which is normally not recommended, however given that we are already using unsafeFlags elsewhere in the manifest, this seems reasonable enough for now until we can improve support for static linking on Windows.

Building the test targets still exceeds the symbol count though.

Author: jakepetroules

Package.swift

@@ -72,8 +72,10 @@ let swiftPMProduct = (
 )
 
 #if os(Windows)
+let includeDynamicLibrary: Bool = false
 let systemSQLitePkgConfig: String? = nil
 #else
+let includeDynamicLibrary: Bool = true
 let systemSQLitePkgConfig: String? = "sqlite3"
 #endif
 
@@ -90,12 +92,15 @@ let package = Package(
     ],
     products:
     autoProducts.flatMap {
-        [
+        (includeDynamicLibrary ? [
             .library(
                 name: $0.name,
                 type: .dynamic,
                 targets: $0.targets
             ),
+        ] : [])
+        +
+        [
             .library(
                 name: "\($0.name)-auto",
                 targets: $0.targets
@@ -167,6 +172,7 @@ let package = Package(
             exclude: ["CMakeLists.txt"],
             swiftSettings: [
                 .enableExperimentalFeature("AccessLevelOnImport"),
+                .unsafeFlags(["-static"]),
             ]
         ),
 
@@ -183,7 +189,8 @@ let package = Package(
             swiftSettings: [
                 .enableExperimentalFeature("StrictConcurrency"),
                 .enableExperimentalFeature("AccessLevelOnImport"),
-                .enableExperimentalFeature("InternalImportsByDefault")
+                .enableExperimentalFeature("InternalImportsByDefault"),
+                .unsafeFlags(["-static"]),
             ]
         ),
 
@@ -202,14 +209,18 @@ let package = Package(
             swiftSettings: [
                 .enableExperimentalFeature("StrictConcurrency"),
                 .enableExperimentalFeature("AccessLevelOnImport"),
+                .unsafeFlags(["-static"]),
             ]
         ),
 
         .target(
             /** The llbuild manifest model */
             name: "LLBuildManifest",
             dependencies: ["Basics"],
-            exclude: ["CMakeLists.txt"]
+            exclude: ["CMakeLists.txt"],
+            swiftSettings: [
+                .unsafeFlags(["-static"]),
+            ]
         ),
 
         .target(
@@ -222,7 +233,10 @@ let package = Package(
                 "PackageModel",
                 "PackageSigning",
             ],
-            exclude: ["CMakeLists.txt"]
+            exclude: ["CMakeLists.txt"],
+            swiftSettings: [
+                .unsafeFlags(["-static"]),
+            ]
         ),
 
         .target(
@@ -232,14 +246,20 @@ let package = Package(
                 "Basics",
                 "PackageModel",
             ],
-            exclude: ["CMakeLists.txt"]
+            exclude: ["CMakeLists.txt"],
+            swiftSettings: [
+                .unsafeFlags(["-static"]),
+            ]
         ),
 
         .target(
             /** Shim for llbuild library */
             name: "SPMLLBuild",
             dependencies: ["Basics"],
-            exclude: ["CMakeLists.txt"]
+            exclude: ["CMakeLists.txt"],
+            swiftSettings: [
+                .unsafeFlags(["-static"]),
+            ]
         ),
 
         // MARK: Project Model
@@ -248,7 +268,10 @@ let package = Package(
             /** Primitive Package model objects */
             name: "PackageModel",
             dependencies: ["Basics"],
-            exclude: ["CMakeLists.txt", "README.md"]
+            exclude: ["CMakeLists.txt", "README.md"],
+            swiftSettings: [
+                .unsafeFlags(["-static"]),
+            ]
         ),
 
         .target(
@@ -265,7 +288,10 @@ let package = Package(
                 .product(name: "SwiftSyntax", package: "swift-syntax"),
                 .product(name: "SwiftSyntaxBuilder", package: "swift-syntax"),
             ],
-            exclude: ["CMakeLists.txt"]
+            exclude: ["CMakeLists.txt"],
+            swiftSettings: [
+                .unsafeFlags(["-static"]),
+            ]
         ),
 
         .target(
@@ -276,7 +302,10 @@ let package = Package(
                 "PackageModel",
                 "SourceControl",
             ],
-            exclude: ["CMakeLists.txt", "README.md"]
+            exclude: ["CMakeLists.txt", "README.md"],
+            swiftSettings: [
+                .unsafeFlags(["-static"]),
+            ]
         ),
 
         // MARK: Package Dependency Resolution
@@ -289,7 +318,10 @@ let package = Package(
                 "PackageLoading",
                 "PackageModel",
             ],
-            exclude: ["CMakeLists.txt", "README.md"]
+            exclude: ["CMakeLists.txt", "README.md"],
+            swiftSettings: [
+                .unsafeFlags(["-static"]),
+            ]
         ),
 
         // MARK: Package Collections
@@ -300,6 +332,9 @@ let package = Package(
             dependencies: [],
             exclude: [
                 "Formats/v1.md",
+            ],
+            swiftSettings: [
+                .unsafeFlags(["-static"]),
             ]
         ),
 
@@ -312,6 +347,9 @@ let package = Package(
                 "PackageCollectionsSigning",
                 "PackageModel",
                 "SourceControl",
+            ],
+            swiftSettings: [
+                .unsafeFlags(["-static"]),
             ]
         ),
 
@@ -322,6 +360,9 @@ let package = Package(
                 .product(name: "X509", package: "swift-certificates"),
                 "Basics",
                 "PackageCollectionsModel",
+            ],
+            swiftSettings: [
+                .unsafeFlags(["-static"]),
             ]
         ),
 
@@ -331,7 +372,10 @@ let package = Package(
                 "Basics",
                 "PackageModel",
             ],
-            exclude: ["CMakeLists.txt"]
+            exclude: ["CMakeLists.txt"],
+            swiftSettings: [
+                .unsafeFlags(["-static"]),
+            ]
         ),
 
         .target(
@@ -342,7 +386,10 @@ let package = Package(
                 "Basics",
                 "PackageModel",
             ],
-            exclude: ["CMakeLists.txt"]
+            exclude: ["CMakeLists.txt"],
+            swiftSettings: [
+                .unsafeFlags(["-static"]),
+            ]
         ),
 
         // MARK: Package Manager Functionality
@@ -354,7 +401,10 @@ let package = Package(
                 "Basics",
                 "PackageGraph",
             ],
-            exclude: ["CMakeLists.txt"]
+            exclude: ["CMakeLists.txt"],
+            swiftSettings: [
+                .unsafeFlags(["-static"]),
+            ]
         ),
         .target(
             /** Builds Modules and Products */
@@ -368,7 +418,10 @@ let package = Package(
                 .product(name: "SwiftDriver", package: "swift-driver"),
                 "DriverSupport",
             ],
-            exclude: ["CMakeLists.txt"]
+            exclude: ["CMakeLists.txt"],
+            swiftSettings: [
+                .unsafeFlags(["-static"]),
+            ]
         ),
         .target(
             name: "DriverSupport",
@@ -377,13 +430,19 @@ let package = Package(
                 "PackageModel",
                 .product(name: "SwiftDriver", package: "swift-driver"),
             ],
-            exclude: ["CMakeLists.txt"]
+            exclude: ["CMakeLists.txt"],
+            swiftSettings: [
+                .unsafeFlags(["-static"]),
+            ]
         ),
         .target(
             /** Support for building using Xcode's build system */
             name: "XCBuildSupport",
             dependencies: ["DriverSupport", "SPMBuildCore", "PackageGraph"],
-            exclude: ["CMakeLists.txt"]
+            exclude: ["CMakeLists.txt"],
+            swiftSettings: [
+                .unsafeFlags(["-static"]),
+            ]
         ),
         .target(
             /** High level functionality */
@@ -398,7 +457,10 @@ let package = Package(
                 "SourceControl",
                 "SPMBuildCore",
             ],
-            exclude: ["CMakeLists.txt"]
+            exclude: ["CMakeLists.txt"],
+            swiftSettings: [
+                .unsafeFlags(["-static"]),
+            ]
         ),
         .target(
             // ** High level interface for package discovery */
@@ -409,6 +471,9 @@ let package = Package(
                 "PackageModel",
                 "PackageRegistry",
                 "PackageSigning",
+            ],
+            swiftSettings: [
+                .unsafeFlags(["-static"]),
             ]
         ),
 
@@ -427,7 +492,10 @@ let package = Package(
                 "Workspace",
                 "XCBuildSupport",
             ],
-            exclude: ["CMakeLists.txt"]
+            exclude: ["CMakeLists.txt"],
+            swiftSettings: [
+                .unsafeFlags(["-static"]),
+            ]
         ),
 
         .target(
@@ -446,7 +514,10 @@ let package = Package(
                 "Workspace",
                 "XCBuildSupport",
             ],
-            exclude: ["CMakeLists.txt", "README.md"]
+            exclude: ["CMakeLists.txt", "README.md"],
+            swiftSettings: [
+                .unsafeFlags(["-static"]),
+            ]
         ),
 
         .target(
@@ -459,7 +530,10 @@ let package = Package(
                 "SPMBuildCore",
                 "PackageModel",
             ],
-            exclude: ["CMakeLists.txt", "README.md"]
+            exclude: ["CMakeLists.txt", "README.md"],
+            swiftSettings: [
+                .unsafeFlags(["-static"]),
+            ]
         ),
 
         .target(
@@ -472,6 +546,9 @@ let package = Package(
                 "CoreCommands",
                 "PackageCollections",
                 "PackageModel",
+            ],
+            swiftSettings: [
+                .unsafeFlags(["-static"]),
             ]
         ),
 
@@ -491,6 +568,9 @@ let package = Package(
                 "SourceControl",
                 "SPMBuildCore",
                 "Workspace",
+            ],
+            swiftSettings: [
+                .unsafeFlags(["-static"]),
             ]
         ),
 
@@ -503,6 +583,7 @@ let package = Package(
             ],
             swiftSettings: [
                 .enableExperimentalFeature("StrictConcurrency=complete"),
+                .unsafeFlags(["-static"]),
             ]
         ),
 
@@ -608,13 +689,19 @@ let package = Package(
                 .product(name: "TSCTestSupport", package: "swift-tools-support-core"),
                 "Workspace",
                 "XCBuildSupport",
+            ],
+            swiftSettings: [
+                .unsafeFlags(["-static"]),
             ]
         ),
 
         .target(
             /** Test for thread-sanitizer. */
             name: "tsan_utils",
-            dependencies: []
+            dependencies: [],
+            swiftSettings: [
+                .unsafeFlags(["-static"]),
+            ]
         ),
 
         // MARK: SwiftPM tests