From 5fec784580e6d43689cbfc7046f96149c71e499b Mon Sep 17 00:00:00 2001
From: Antonio Scandurra <me@as-cii.com>
Date: Fri, 2 Sep 2022 11:42:39 +0200
Subject: [PATCH] Link Swift stdlib

---
 Cargo.lock                                    |  2 +
 .../LiveKitObjC.xcodeproj/project.pbxproj     |  8 ---
 crates/capture/Cargo.toml                     |  2 +
 crates/capture/build.rs                       | 56 +++++++++++++++++++
 4 files changed, 60 insertions(+), 8 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index 60e54aeb9f..bf60a08367 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -770,6 +770,8 @@ dependencies = [
  "objc",
  "parking_lot 0.11.2",
  "postage",
+ "serde",
+ "serde_json",
  "simplelog",
 ]
 
diff --git a/LiveKitObjC/LiveKitObjC.xcodeproj/project.pbxproj b/LiveKitObjC/LiveKitObjC.xcodeproj/project.pbxproj
index 9c7a6136b3..db7445a28f 100644
--- a/LiveKitObjC/LiveKitObjC.xcodeproj/project.pbxproj
+++ b/LiveKitObjC/LiveKitObjC.xcodeproj/project.pbxproj
@@ -243,11 +243,8 @@
 		AFA4DBD228C0F7F5001AD7BE /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
-				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
-				BUILD_LIBRARY_FOR_DISTRIBUTION = NO;
 				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_STYLE = Automatic;
-				DEFINES_MODULE = NO;
 				EXECUTABLE_PREFIX = lib;
 				KEEP_PRIVATE_EXTERNS = NO;
 				LD_RUNPATH_SEARCH_PATHS = (
@@ -256,7 +253,6 @@
 					"@loader_path/../Frameworks",
 				);
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SKIP_INSTALL = YES;
 				SWIFT_OBJC_BRIDGING_HEADER = "LiveKitObjC-Bridging-Header.h";
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
 				SWIFT_VERSION = 5.0;
@@ -266,11 +262,8 @@
 		AFA4DBD328C0F7F5001AD7BE /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
-				ALWAYS_EMBED_SWIFT_STANDARD_LIBRARIES = YES;
-				BUILD_LIBRARY_FOR_DISTRIBUTION = NO;
 				CLANG_ENABLE_MODULES = YES;
 				CODE_SIGN_STYLE = Automatic;
-				DEFINES_MODULE = NO;
 				EXECUTABLE_PREFIX = lib;
 				KEEP_PRIVATE_EXTERNS = NO;
 				LD_RUNPATH_SEARCH_PATHS = (
@@ -279,7 +272,6 @@
 					"@loader_path/../Frameworks",
 				);
 				PRODUCT_NAME = "$(TARGET_NAME)";
-				SKIP_INSTALL = YES;
 				SWIFT_OBJC_BRIDGING_HEADER = "LiveKitObjC-Bridging-Header.h";
 				SWIFT_VERSION = 5.0;
 			};
diff --git a/crates/capture/Cargo.toml b/crates/capture/Cargo.toml
index cdae75fc2b..339198f764 100644
--- a/crates/capture/Cargo.toml
+++ b/crates/capture/Cargo.toml
@@ -25,3 +25,5 @@ simplelog = "0.9"
 
 [build-dependencies]
 bindgen = "0.59.2"
+serde = { version = "1.0", features = ["derive", "rc"] }
+serde_json = { version = "1.0", features = ["preserve_order"] }
\ No newline at end of file
diff --git a/crates/capture/build.rs b/crates/capture/build.rs
index 630cf1ed6b..b16ed18960 100644
--- a/crates/capture/build.rs
+++ b/crates/capture/build.rs
@@ -1,6 +1,62 @@
+use serde::Deserialize;
 use std::{env, path::PathBuf, process::Command};
 
+#[derive(Debug, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct SwiftTargetInfo {
+    pub triple: String,
+    pub unversioned_triple: String,
+    pub module_triple: String,
+    pub swift_runtime_compatibility_version: String,
+    #[serde(rename = "librariesRequireRPath")]
+    pub libraries_require_rpath: bool,
+}
+
+#[derive(Debug, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct SwiftPaths {
+    pub runtime_library_paths: Vec<String>,
+    pub runtime_library_import_paths: Vec<String>,
+    pub runtime_resource_path: String,
+}
+
+#[derive(Debug, Deserialize)]
+pub struct SwiftTarget {
+    pub target: SwiftTargetInfo,
+    pub paths: SwiftPaths,
+}
+
+const MACOS_TARGET_VERSION: &str = "12";
+
+pub fn link_swift_libs() {
+    let mut arch = env::var("CARGO_CFG_TARGET_ARCH").unwrap();
+    if arch == "aarch64" {
+        arch = "arm64".into();
+    }
+    let target = format!("{}-apple-macosx{}", arch, MACOS_TARGET_VERSION);
+
+    let swift_target_info_str = Command::new("swift")
+        .args(&["-target", &target, "-print-target-info"])
+        .output()
+        .unwrap()
+        .stdout;
+
+    let swift_target_info: SwiftTarget = serde_json::from_slice(&swift_target_info_str).unwrap();
+    if swift_target_info.target.libraries_require_rpath {
+        panic!("Libraries require RPath! Change minimum MacOS value to fix.")
+    }
+
+    swift_target_info
+        .paths
+        .runtime_library_paths
+        .iter()
+        .for_each(|path| {
+            println!("cargo:rustc-link-search=native={}", path);
+        });
+}
+
 fn main() {
+    link_swift_libs();
     println!("cargo:rerun-if-changed=/Users/as-cii/Library/Developer/Xcode/DerivedData/LiveKitObjC-ftgpxknhsgkrocbhhgjkyyvkgkbj/Build/Products/Debug/libLiveKitObjC.a");
     println!("cargo:rustc-link-search=/Users/as-cii/Library/Developer/Xcode/DerivedData/LiveKitObjC-ftgpxknhsgkrocbhhgjkyyvkgkbj/Build/Products/Debug");
     println!("cargo:rustc-link-lib=static=LiveKitObjC");