From 7eaf47d7b524940665f53e033fc5198003e41246 Mon Sep 17 00:00:00 2001
From: "L. E. Segovia" <amy@centricular.com>
Date: Fri, 6 Sep 2024 17:37:30 +0000
Subject: [PATCH] Add workaround for linking against macOS SDK's relocatable
 dylibs

See https://github.com/rust-lang/cargo/issues/5077#issuecomment-1284482987
and https://github.com/rust-lang/rust/issues/127100

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer-rs/-/merge_requests/1516>
---
 Cargo.lock           |  2 ++
 examples/Cargo.toml  |  6 ++++++
 examples/build.rs    | 18 ++++++++++++++++++
 tutorials/Cargo.toml |  6 ++++++
 tutorials/build.rs   | 23 +++++++++++++++++++++++
 5 files changed, 55 insertions(+)
 create mode 100644 tutorials/build.rs

diff --git a/Cargo.lock b/Cargo.lock
index 6f4b30a6e..f15ca0e8c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -547,6 +547,7 @@ dependencies = [
  "pango",
  "pangocairo",
  "raw-window-handle",
+ "system-deps",
  "uds",
  "windows",
  "winit",
@@ -2447,6 +2448,7 @@ dependencies = [
  "gstreamer-pbutils",
  "gstreamer-video",
  "objc",
+ "system-deps",
  "termion",
 ]
 
diff --git a/examples/Cargo.toml b/examples/Cargo.toml
index 883d51adf..4a866f5f8 100644
--- a/examples/Cargo.toml
+++ b/examples/Cargo.toml
@@ -56,6 +56,12 @@ windows = { version = "0.58", features=["Win32_Graphics_Direct3D11",
 cocoa = "0.26"
 objc = "0.2.7"
 
+[target.'cfg(target_os = "macos")'.build-dependencies]
+system-deps = "7"
+
+[package.metadata.system-deps]
+"gstreamer-1.0" = "1.14"
+
 [build-dependencies]
 gl_generator = { version = "0.14", optional = true }
 
diff --git a/examples/build.rs b/examples/build.rs
index d447680a8..56d3b534a 100644
--- a/examples/build.rs
+++ b/examples/build.rs
@@ -19,4 +19,22 @@ fn generate_gl_bindings() {}
 fn main() {
     println!("cargo:rerun-if-changed=build.rs");
     generate_gl_bindings();
+
+    // https://github.com/rust-lang/cargo/issues/5077#issuecomment-1284482987
+    #[cfg(all(not(docsrs), target_os = "macos"))]
+    match system_deps::Config::new().probe() {
+        Ok(deps) => {
+            let usr = std::path::Path::new("/usr/lib");
+            let usr_local = std::path::Path::new("/usr/local/lib");
+            for dep in deps.all_link_paths() {
+                if dep != &usr && dep != &usr_local {
+                    println!("cargo:rustc-link-arg=-Wl,-rpath,{:?}", dep.as_os_str());
+                }
+            }
+        }
+        Err(s) => {
+            println!("cargo:warning={s}");
+            std::process::exit(1);
+        }
+    }
 }
diff --git a/tutorials/Cargo.toml b/tutorials/Cargo.toml
index 5ad4a1b22..f09c01995 100644
--- a/tutorials/Cargo.toml
+++ b/tutorials/Cargo.toml
@@ -23,6 +23,12 @@ futures = "0.3"
 cocoa = "0.26"
 objc = "0.2.7"
 
+[target.'cfg(target_os = "macos")'.build-dependencies]
+system-deps = "7"
+
+[package.metadata.system-deps]
+"gstreamer-1.0" = "1.14"
+
 [[bin]]
 name = "basic-tutorial-13"
 required-features = ["termion"]
diff --git a/tutorials/build.rs b/tutorials/build.rs
new file mode 100644
index 000000000..66740cbdf
--- /dev/null
+++ b/tutorials/build.rs
@@ -0,0 +1,23 @@
+#[cfg(docsrs)]
+fn main() {} // prevent linking libraries to avoid documentation failure
+
+// https://github.com/rust-lang/cargo/issues/5077#issuecomment-1284482987
+#[cfg(not(docsrs))]
+fn main() {
+    #[cfg(target_os = "macos")]
+    match system_deps::Config::new().probe() {
+        Ok(deps) => {
+            let usr = std::path::Path::new("/usr/lib");
+            let usr_local = std::path::Path::new("/usr/local/lib");
+            for dep in deps.all_link_paths() {
+                if dep != &usr && dep != &usr_local {
+                    println!("cargo:rustc-link-arg=-Wl,-rpath,{:?}", dep.as_os_str());
+                }
+            }
+        }
+        Err(s) => {
+            println!("cargo:warning={s}");
+            std::process::exit(1);
+        }
+    }
+}