Fix WASI build issue

Author: Kyle-Ye

Package.swift

@@ -164,13 +164,15 @@ let package = Package(
             cSettings: [
                 .unsafeFlags(["-I", includePath], .when(platforms: .nonDarwinPlatforms)),
                 .define("__COREFOUNDATION_FORSWIFTFOUNDATIONONLY__", to: "1", .when(platforms: .nonDarwinPlatforms)),
+                .define("_WASI_EMULATED_SIGNAL", .when(platforms: [.wasi])),
             ]
         ),
         .target(
             name: "COpenSwiftUICore",
             cSettings: [
                 .unsafeFlags(["-I", includePath], .when(platforms: .nonDarwinPlatforms)),
                 .define("__COREFOUNDATION_FORSWIFTFOUNDATIONONLY__", to: "1", .when(platforms: .nonDarwinPlatforms)),
+                .define("_WASI_EMULATED_SIGNAL", .when(platforms: [.wasi])),
             ]
         ),
         .binaryTarget(name: "CoreServices", path: "PrivateFrameworks/CoreServices.xcframework"),

[email protected]

@@ -160,13 +160,15 @@ let package = Package(
             cSettings: [
                 .unsafeFlags(["-I", includePath], .when(platforms: .nonDarwinPlatforms)),
                 .define("__COREFOUNDATION_FORSWIFTFOUNDATIONONLY__", to: "1", .when(platforms: .nonDarwinPlatforms)),
+                .define("_WASI_EMULATED_SIGNAL", .when(platforms: [.wasi])),
             ]
         ),
         .target(
             name: "COpenSwiftUICore",
             cSettings: [
                 .unsafeFlags(["-I", includePath], .when(platforms: .nonDarwinPlatforms)),
                 .define("__COREFOUNDATION_FORSWIFTFOUNDATIONONLY__", to: "1", .when(platforms: .nonDarwinPlatforms)),
+                .define("_WASI_EMULATED_SIGNAL", .when(platforms: [.wasi])),
             ]
         ),
         .binaryTarget(name: "CoreServices", path: "PrivateFrameworks/CoreServices.xcframework"),