Support Swift Package Manager

.gitignore

@@ -63,4 +63,8 @@ fastlane/test_output
 # After new code Injection tools there's a generated folder /iOSInjectionProject
 # https://github.com/johnno1962/injectionforxcode
 
-iOSInjectionProject/
+iOSInjectionProject/
+
+# SwiftPM
+.build
+.swiftpm

Package.swift

@@ -0,0 +1,28 @@
+// swift-tools-version:5.0
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+import PackageDescription
+
+let package = Package(
+    name: "libwebp",
+    products: [
+        // Products define the executables and libraries produced by a package, and make them visible to other packages.
+        .library(
+            name: "libwebp",
+            targets: ["libwebp"]),
+    ],
+    dependencies: [
+        // Dependencies declare other packages that this package depends on.
+        // .package(url: /* package url */, from: "1.0.0"),
+    ],
+    targets: [
+        // Targets are the basic building blocks of a package. A target can define a module or a test suite.
+        // Targets can depend on other targets in this package, and on products in packages which this package depends on.
+        .target(
+            name: "libwebp",
+            dependencies: [],
+            path: "libwebp/src",
+            publicHeadersPath: "webp",
+            cSettings: [.headerSearchPath("../")])
+    ]
+)