Fix paths on Mac Catalyst (#1070)

Author: madsmtm

src/lib.rs

@@ -2705,39 +2705,38 @@ impl Build {
             let sdk_path = self.apple_sdk_root(&sdk_details.sdk)?;
 
             cmd.args.push("-isysroot".into());
-            cmd.args.push(sdk_path);
-        }
-
-        if let AppleArchSpec::Catalyst(_) = arch {
-            // Mac Catalyst uses the macOS SDK, but to compile against and
-            // link to iOS-specific frameworks, we should have the support
-            // library stubs in the include and library search path.
-            let sdk_path = self.apple_sdk_root(&sdk_details.sdk)?;
-            let ios_support = PathBuf::from(sdk_path).join("/System/iOSSupport");
-
-            cmd.args.extend([
-                // Header search path
-                OsString::from("-isystem"),
-                ios_support.join("/usr/include").into(),
-                // Framework header search path
-                OsString::from("-iframework"),
-                ios_support.join("/System/Library/Frameworks").into(),
-                // Library search path
-                {
-                    let mut s = OsString::from("-L");
-                    s.push(&ios_support.join("/usr/lib"));
-                    s
-                },
-                // Framework linker search path
-                {
-                    // Technically, we _could_ avoid emitting `-F`, as
-                    // `-iframework` implies it, but let's keep it in for
-                    // clarity.
-                    let mut s = OsString::from("-F");
-                    s.push(&ios_support.join("/System/Library/Frameworks"));
-                    s
-                },
-            ]);
+            cmd.args.push(sdk_path.clone());
+
+            if let AppleArchSpec::Catalyst(_) = arch {
+                // Mac Catalyst uses the macOS SDK, but to compile against and
+                // link to iOS-specific frameworks, we should have the support
+                // library stubs in the include and library search path.
+                let ios_support = PathBuf::from(sdk_path).join("System/iOSSupport");
+
+                cmd.args.extend([
+                    // Header search path
+                    OsString::from("-isystem"),
+                    ios_support.join("usr/include").into(),
+                    // Framework header search path
+                    OsString::from("-iframework"),
+                    ios_support.join("System/Library/Frameworks").into(),
+                    // Library search path
+                    {
+                        let mut s = OsString::from("-L");
+                        s.push(&ios_support.join("usr/lib"));
+                        s
+                    },
+                    // Framework linker search path
+                    {
+                        // Technically, we _could_ avoid emitting `-F`, as
+                        // `-iframework` implies it, but let's keep it in for
+                        // clarity.
+                        let mut s = OsString::from("-F");
+                        s.push(&ios_support.join("System/Library/Frameworks"));
+                        s
+                    },
+                ]);
+            }
         }
 
         Ok(())

tests/test.rs

@@ -584,6 +584,43 @@ fn clang_apple_tvos() {
     }
 }
 
+#[cfg(target_os = "macos")]
+#[test]
+fn clang_apple_mac_catalyst() {
+    let output = std::process::Command::new("xcrun")
+        .args(["--show-sdk-path", "--sdk", "macosx"])
+        .output()
+        .unwrap();
+    if !output.status.success() {
+        return;
+    }
+    let sdkroot = std::str::from_utf8(&output.stdout).unwrap().trim();
+
+    let test = Test::clang();
+    test.gcc()
+        .target("aarch64-apple-ios-macabi")
+        .__set_env("IPHONEOS_DEPLOYMENT_TARGET", "15.0")
+        .file("foo.c")
+        .compile("foo");
+    let execution = test.cmd(0);
+
+    // TODO: Add version to target here
+    execution.must_have("--target=arm64-apple-ios-macabi");
+    execution.must_have_in_order("-isysroot", sdkroot);
+    execution.must_have_in_order(
+        "-isystem",
+        &format!("{sdkroot}/System/iOSSupport/usr/include"),
+    );
+    execution.must_have_in_order(
+        "-iframework",
+        &format!("{sdkroot}/System/iOSSupport/System/Library/Frameworks"),
+    );
+    execution.must_have(&format!("-L{sdkroot}/System/iOSSupport/usr/lib"));
+    execution.must_have(&format!(
+        "-F{sdkroot}/System/iOSSupport/System/Library/Frameworks"
+    ));
+}
+
 #[cfg(target_os = "macos")]
 #[test]
 fn clang_apple_tvsimulator() {