From 2b8a05b8d9125b7465f0d3bd44e90d82a06dd5fa Mon Sep 17 00:00:00 2001
From: Matthew Lugg <mlugg@mlugg.co.uk>
Date: Thu, 30 Apr 2026 09:57:20 +0100
Subject: [PATCH] tests: restore standalone/ios, add Zig code to it

This was deleted in beef9fdf42726d8cfe3017ff3017767fb615ef08 because it
was setting `b.sysroot`. However, I frankly have no idea why it was
doing that---the test works just fine without touching `b.sysroot`!

Even before it was removed, this test was never actually running,
because the executable was not added as a dependency of `test_step`. I
made it run, and updated it to work (it was previously failing due to a
missing framework path).

I also added some Zig source code, the goal being to test that the panic
handler compiles okay on iOS. I confirmed that the updated test passes
as-is, but fails if the fix in the previous commit is reverted.

Because this test requires the iOS SDK to be installed, it is only run
if `-Denable-ios-sdk` is passed to `zig build`, which is currently not
the case in CI. For now, I am not changing this, because the
aarch64-macos CI runner currently does not have the iOS SDK installed.
It would be good to enable this coverage on CI at some point, though.
---
 test/standalone/build.zig.zon |  3 +++
 test/standalone/ios/build.zig | 41 +++++++++++++++++++++++++++++++++++
 test/standalone/ios/main.m    | 38 ++++++++++++++++++++++++++++++++
 test/standalone/ios/panic.zig |  4 ++++
 4 files changed, 86 insertions(+)
 create mode 100644 test/standalone/ios/build.zig
 create mode 100644 test/standalone/ios/main.m
 create mode 100644 test/standalone/ios/panic.zig

diff --git a/test/standalone/build.zig.zon b/test/standalone/build.zig.zon
index 175a106f3e544374e88a8aa1ab76d3a2abfc4895..072bcd0309cf4decce854badf096994606a1e550 100644
--- a/test/standalone/build.zig.zon
+++ b/test/standalone/build.zig.zon
@@ -153,6 +153,9 @@
         .compiler_rt_panic = .{
             .path = "compiler_rt_panic",
         },
+        .ios = .{
+            .path = "ios",
+        },
         .depend_on_main_mod = .{
             .path = "depend_on_main_mod",
         },
diff --git a/test/standalone/ios/build.zig b/test/standalone/ios/build.zig
new file mode 100644
index 0000000000000000000000000000000000000000..cd1d52aec973ab44c8c4f30d0224c6e0f34b5268
--- /dev/null
+++ b/test/standalone/ios/build.zig
@@ -0,0 +1,41 @@
+const std = @import("std");
+
+pub const requires_symlinks = true;
+pub const requires_ios_sdk = true;
+
+pub fn build(b: *std.Build) void {
+    const test_step = b.step("test", "Test it");
+    b.default_step = test_step;
+
+    const target = b.resolveTargetQuery(.{
+        .cpu_arch = .aarch64,
+        .os_tag = .ios,
+    });
+
+    const exe = b.addExecutable(.{
+        .name = "main",
+        .root_module = b.createModule(.{
+            .root_source_file = b.path("panic.zig"),
+            .optimize = .Debug,
+            .target = target,
+            .link_libc = true,
+        }),
+    });
+
+    const io = b.graph.io;
+
+    if (std.zig.system.darwin.getSdk(b.allocator, io, &target.result)) |sdk| {
+        exe.root_module.addSystemIncludePath(.{ .cwd_relative = b.pathJoin(&.{ sdk, "/usr/include" }) });
+        exe.root_module.addSystemFrameworkPath(.{ .cwd_relative = b.pathJoin(&.{ sdk, "/System/Library/Frameworks" }) });
+        exe.root_module.addSystemFrameworkPath(.{ .cwd_relative = b.pathJoin(&.{ sdk, "/System/Library/SubFrameworks" }) });
+        exe.root_module.addLibraryPath(.{ .cwd_relative = b.pathJoin(&.{ sdk, "/usr/lib" }) });
+    } else {
+        exe.step.dependOn(&b.addFail("no iOS SDK found").step);
+    }
+
+    exe.root_module.addCSourceFile(.{ .file = b.path("main.m"), .flags = &.{} });
+    exe.root_module.linkFramework("Foundation", .{});
+    exe.root_module.linkFramework("UIKit", .{});
+
+    test_step.dependOn(&b.addInstallArtifact(exe, .{}).step);
+}
diff --git a/test/standalone/ios/main.m b/test/standalone/ios/main.m
new file mode 100644
index 0000000000000000000000000000000000000000..82b9a8c20fcd49a4c447178a841c84d366377e30
--- /dev/null
+++ b/test/standalone/ios/main.m
@@ -0,0 +1,38 @@
+#import <UIKit/UIKit.h>
+
+@interface AppDelegate : UIResponder <UIApplicationDelegate>
+@property (strong, nonatomic) UIWindow *window;
+@end
+
+extern void zig_panic();
+
+int main() {
+  @autoreleasepool {
+    return UIApplicationMain(0, nil, nil, NSStringFromClass([AppDelegate class]));
+  }
+}
+
+@implementation AppDelegate
+
+- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(id)options {
+  CGRect mainScreenBounds = [[UIScreen mainScreen] bounds];
+  self.window = [[UIWindow alloc] initWithFrame:mainScreenBounds];
+  UIViewController *viewController = [[UIViewController alloc] init];
+  viewController.view.frame = mainScreenBounds;
+
+  NSString* msg = @"Hello world";
+
+  UILabel *label = [[UILabel alloc] initWithFrame:mainScreenBounds];
+  [label setText:msg];
+  [viewController.view addSubview: label];
+
+  self.window.rootViewController = viewController;
+
+  [self.window makeKeyAndVisible];
+
+  zig_panic();
+
+  return YES;
+}
+
+@end
diff --git a/test/standalone/ios/panic.zig b/test/standalone/ios/panic.zig
new file mode 100644
index 0000000000000000000000000000000000000000..5acb60da2dd9d9cb4dfcf8800b70a7dcea977e95
--- /dev/null
+++ b/test/standalone/ios/panic.zig
@@ -0,0 +1,4 @@
+export fn zig_panic() void {
+    @panic("called zig_panic");
+}
+pub const _start = {}; // entry point is in main.m
-- 
2.54.0