From 7e3d0bd4092ca40b3171205b319c0658afabf4e1 Mon Sep 17 00:00:00 2001
From: Mike Hommey <mh+mozilla@glandium.org>
Date: Thu, 29 Feb 2024 00:59:09 +0000
Subject: [PATCH] Bug 1834947 - Divert xcrun so that it outputs the build
 system's chosen iOS SDK. r=firefox-build-system-reviewers,nalexander

Differential Revision: https://phabricator.services.mozilla.com/D179033
---
 build/macosx/xcrun       | 10 ++++++++++
 config/makefiles/rust.mk |  3 +++
 2 files changed, 13 insertions(+)
 create mode 100755 build/macosx/xcrun

diff --git a/build/macosx/xcrun b/build/macosx/xcrun
new file mode 100755
index 000000000000..7642586e3095
--- /dev/null
+++ b/build/macosx/xcrun
@@ -0,0 +1,10 @@
+#!/bin/sh
+
+case "$*" in
+"--show-sdk-path --sdk iphoneos"|"--show-sdk-path -sdk iphoneos")
+    ;;
+*)
+    echo We only expect this to be executed by third_party/rust/cc/src/lib.rs or rustc when targetting iOS >&2
+    exit 1
+esac
+echo $IPHONEOS_SDK_DIR
diff --git a/config/makefiles/rust.mk b/config/makefiles/rust.mk
index 5fdd6d937375..b10594f5cb8f 100644
--- a/config/makefiles/rust.mk
+++ b/config/makefiles/rust.mk
@@ -254,6 +254,9 @@ export COREAUDIO_SDK_PATH=$(MACOS_SDK_DIR)
 endif
 ifdef IPHONEOS_SDK_DIR
 export COREAUDIO_SDK_PATH=$(IPHONEOS_SDK_DIR)
+# export for build/macosx/xcrun
+export IPHONEOS_SDK_DIR
+PATH := $(topsrcdir)/build/macosx:$(PATH)
 endif
 endif