allow compilation with the static linux sdk (musl) (#331)

Author: sebsto

Package.swift

@@ -21,8 +21,8 @@ let package = Package(
         .library(name: "AWSLambdaTesting", targets: ["AWSLambdaTesting"]),
     ],
     dependencies: [
-        .package(url: "https://github.com/apple/swift-nio.git", .upToNextMajor(from: "2.43.1")),
-        .package(url: "https://github.com/apple/swift-log.git", .upToNextMajor(from: "1.4.2")),
+        .package(url: "https://github.com/apple/swift-nio.git", .upToNextMajor(from: "2.67.0")),
+        .package(url: "https://github.com/apple/swift-log.git", .upToNextMajor(from: "1.5.4")),
         .package(url: "https://github.com/apple/swift-docc-plugin", from: "1.0.0"),
     ],
     targets: [

Plugins/AWSLambdaPackager/Plugin.swift

@@ -16,8 +16,16 @@ import Dispatch
 import Foundation
 import PackagePlugin
 
-#if canImport(Glibc)
+#if os(macOS)
+import Darwin
+#elseif canImport(Glibc)
 import Glibc
+#elseif canImport(Musl)
+import Musl
+#elseif os(Windows)
+import ucrt
+#else
+#error("Unsupported platform")
 #endif
 
 @main

Sources/AWSLambdaRuntimeCore/Lambda.swift

@@ -12,10 +12,16 @@
 //
 //===----------------------------------------------------------------------===//
 
-#if os(Linux)
+#if os(macOS)
+import Darwin.C
+#elseif canImport(Glibc)
 import Glibc
+#elseif canImport(Musl)
+import Musl
+#elseif os(Windows)
+import ucrt
 #else
-import Darwin.C
+#error("Unsupported platform")
 #endif
 
 #if swift(<5.9)