deploy : add a Package.swift for SwiftPM support (ggml-org#393)

* Add a Package.swift for SwiftPM support

* Swap from exclusions to allowlist

Author: j-f1

.gitignore

@@ -5,6 +5,7 @@
 .vscode/
 .DS_Store
 
+.build/
 build/
 build-em/
 build-debug/
@@ -27,3 +28,7 @@ compile_commands.json
 
 .envrc
 .direnv/
+
+.venv
+__pycache__
+.swiftpm

Package.swift

@@ -0,0 +1,20 @@
+// swift-tools-version:5.3
+
+import PackageDescription
+
+let package = Package(
+    name: "llama",
+    products: [
+        .library(name: "llama", targets: ["llama"]),
+    ],
+    targets: [
+        .target(
+            name: "llama",
+            path: ".",
+            sources: ["ggml.c", "llama.cpp"],
+            publicHeadersPath: "spm-headers",
+            cSettings: [.unsafeFlags(["-Wno-shorten-64-to-32"])]
+        ),
+    ],
+    cxxLanguageStandard: .cxx11
+)

spm-headers/llama.h

@@ -0,0 +1 @@
+../llama.h