From b29afd776ea1ae78e52e244117d8a016f1d2fa00 Mon Sep 17 00:00:00 2001
From: Mia Koring <koring.mia@gmail.com>
Date: Mon, 10 Nov 2025 17:53:56 +0100
Subject: [PATCH] added Xlinker /SUBSYSTEM:WINDOWS argument for gui apps on
 windows

Fixes undefined: main linker issue on windows 11 with swift 6.2
---
 .../Bundler/SwiftPackageManager/SwiftPackageManager.swift      | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Sources/SwiftBundler/Bundler/SwiftPackageManager/SwiftPackageManager.swift b/Sources/SwiftBundler/Bundler/SwiftPackageManager/SwiftPackageManager.swift
index 0efd8f8..d7d4534 100644
--- a/Sources/SwiftBundler/Bundler/SwiftPackageManager/SwiftPackageManager.swift
+++ b/Sources/SwiftBundler/Bundler/SwiftPackageManager/SwiftPackageManager.swift
@@ -214,7 +214,8 @@ enum SwiftPackageManager {
         if buildContext.isGUIExecutable {
           let frontendArguments = ["-entry-point-function-name", "wWinMain"]
           let swiftcArguments = frontendArguments.flatMap { ["-Xfrontend", $0] }
-          guiArguments = swiftcArguments.flatMap { ["-Xswiftc", $0] }
+          guiArguments = swiftcArguments.flatMap { ["-Xswiftc", $0] } +
+            ["-Xlinker", "/SUBSYSTEM:WINDOWS"]
         } else {
           guiArguments = []
         }