get rid of external flags for building

Author: sliemeobn

Diff for: Examples/Embedded/Package.swift

@@ -16,7 +16,8 @@ let package = Package(
                 .product(name: "dlmalloc", package: "swift-dlmalloc")
             ],
             cSettings: [
-                .unsafeFlags(["-fdeclspec"])
+                .unsafeFlags(["-fdeclspec"]),
+                .define("__Embedded"),
             ],
             swiftSettings: [
                 .enableExperimentalFeature("Embedded"),
@@ -29,7 +30,8 @@ let package = Package(
             linkerSettings: [
                 .unsafeFlags([
                     "-Xclang-linker", "-nostdlib",
-                    "-Xlinker", "--no-entry"
+                    "-Xlinker", "--no-entry",
+                    "-Xlinker", "--export-if-defined=__main_argc_argv"
                 ])
             ]
         )

Diff for: Examples/Embedded/build.sh

@@ -1,10 +1,5 @@
 #!/bin/bash
 package_dir="$(cd "$(dirname "$0")" && pwd)"
-JAVASCRIPTKIT_EXPERIMENTAL_EMBEDDED_WASM=true swift build --package-path "$package_dir" -c release --product EmbeddedApp \
-  --triple wasm32-unknown-none-wasm  \
-  -Xswiftc -enable-experimental-feature -Xswiftc Embedded \
-  -Xswiftc -enable-experimental-feature -Xswiftc Extern \
-  -Xcc -D__Embedded -Xcc -fdeclspec \
-  -Xlinker --export-if-defined=__main_argc_argv \
-  -Xlinker --export-if-defined=swjs_call_host_function \
-  -Xswiftc -Xclang-linker -Xswiftc -mexec-model=reactor
+JAVASCRIPTKIT_EXPERIMENTAL_EMBEDDED_WASM=true \
+  swift build --package-path "$package_dir" --product EmbeddedApp \
+  -c release --triple wasm32-unknown-none-wasm

Diff for: Package.swift

@@ -1,4 +1,4 @@
-// swift-tools-version:5.7
+// swift-tools-version:5.8
 
 import PackageDescription
 import Foundation
@@ -19,11 +19,21 @@ let package = Package(
             name: "JavaScriptKit",
             dependencies: ["_CJavaScriptKit"], 
             resources: shouldBuildForEmbedded ? [] : [.copy("Runtime")],
+            cSettings: shouldBuildForEmbedded ? [
+                    .unsafeFlags(["-fdeclspec"]),
+                    .define("__Embedded"),
+                ] : nil,
             swiftSettings: shouldBuildForEmbedded 
-                ? [.unsafeFlags(["-Xfrontend", "-emit-empty-object-file"])] 
-                : []
+                ? [
+                    .enableExperimentalFeature("Embedded"),
+                    .enableExperimentalFeature("Extern"),
+                    .unsafeFlags(["-Xfrontend", "-emit-empty-object-file"])
+                ] : nil,
+        ),
+        .target(
+            name: "_CJavaScriptKit",
+            cSettings: shouldBuildForEmbedded ? [.define("__Embedded")] : nil
         ),
-        .target(name: "_CJavaScriptKit"),
         .target(
             name: "JavaScriptBigIntSupport",
             dependencies: ["_CJavaScriptBigIntSupport", "JavaScriptKit"]