Return an error when macOS ABI is not {none, simulator, macabi}

src/Compilation.zig

@@ -1719,6 +1719,15 @@ pub fn create(gpa: Allocator, options: InitOptions) !*Compilation {
     const have_bin_emit = comp.bin_file.options.emit != null or comp.whole_bin_sub_path != null;
 
     if (have_bin_emit and !comp.bin_file.options.skip_linker_dependencies) {
+        if (comp.getTarget().isDarwin()) {
+            switch (comp.getTarget().abi) {
+                .none,
+                .simulator,
+                .macabi,
+                => {},
+                else => return error.LibCUnavailable,
+            }
+        }
         // If we need to build glibc for the target, add work items for it.
         // We go through the work queue so that building can be done in parallel.
         if (comp.wantBuildGLibCFromSource()) {

src/codegen/llvm.zig

@@ -86,6 +86,9 @@ pub fn targetTriple(allocator: Allocator, target: std.Target) ![:0]u8 {
         .spirv64 => return error.@"LLVM backend does not support SPIR-V",
     };
 
+    var arena = std.heap.ArenaAllocator.init(allocator);
+    defer arena.deinit();
+
     const llvm_os = blk: {
         if (target.os.tag.isDarwin()) {
             const min_version = target.os.version_range.semver.min;
@@ -96,7 +99,7 @@ pub fn targetTriple(allocator: Allocator, target: std.Target) ![:0]u8 {
                 .watchos => "watchos",
                 else => unreachable,
             };
-            break :blk try std.fmt.allocPrintZ(allocator, "{s}{d}.{d}.{d}", .{
+            break :blk try std.fmt.allocPrintZ(arena.allocator(), "{s}{d}.{d}.{d}", .{
                 llvm_os,
                 min_version.major,
                 min_version.minor,

src/link/MachO/Dylib.zig

@@ -305,6 +305,7 @@ const TargetMatcher = struct {
         const abi: ?[]const u8 = switch (target.abi) {
             .none => null,
             .simulator => "simulator",
+            .macabi => "maccatalyst",
             else => unreachable,
         };
         if (abi) |x| {