From f8f3b6f6945e5456fc02be286412778cd8e66742 Mon Sep 17 00:00:00 2001
From: Sam <30577766+Samasaur1@users.noreply.github.com>
Date: Wed, 29 Apr 2026 22:14:21 -0700
Subject: [PATCH] Fall back to Zig-bundled Darwin headers when an SDK can't be
 found

Currently, cross to Darwin uses the Darwin headers bundled with Zig.
However, if you're running a build _on_ Darwin, an error is thrown if
the SDK can't be found, even though the bundled headers are still
available.

Now, we continue to search for and prefer the installed SDK, but if it
can't be found, we fall back to the bundled headers rather than failing
the build.
---
 pkg/apple-sdk/build.zig | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/pkg/apple-sdk/build.zig b/pkg/apple-sdk/build.zig
index a61cd3843..f897919f4 100644
--- a/pkg/apple-sdk/build.zig
+++ b/pkg/apple-sdk/build.zig
@@ -49,15 +49,15 @@ pub fn addPaths(
     });
 
     if (!gop.found_existing) init: {
-        if (comptime builtin.os.tag.isDarwin()) {
+        if (comptime builtin.os.tag.isDarwin()) darwin: {
             // Detect our SDK using the "findNative" Zig stdlib function.
             // This is really important because it forces using `xcrun` to
             // find the SDK path.
-            const libc = try std.zig.LibCInstallation.findNative(.{
+            const libc = std.zig.LibCInstallation.findNative(.{
                 .allocator = b.allocator,
                 .target = &step.rootModuleTarget(),
                 .verbose = false,
-            });
+            }) catch break :darwin;
 
             // Render the file compatible with the `--libc` Zig flag.
             var stream: std.io.Writer.Allocating = .init(b.allocator);