From 8fe8021f5a5b48520f9c1095e7cfa1fd416b6dfd Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@ruby-lang.org>
Date: Sun, 17 Nov 2024 22:49:16 +0900
Subject: [PATCH] Win32: Expose wchar main routine only

Warned if both of `main` and `wmain` are exposed:
```
LINK : warning LNK4067: ambiguous entry point; selected 'mainCRTStartup'
```
---
 main.c          | 10 ++++++----
 win32/winmain.c |  4 ++--
 2 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/main.c b/main.c
index 5e29de8009..8b2252c2c5 100644
--- a/main.c
+++ b/main.c
@@ -48,6 +48,12 @@ int rb_wasm_rt_start(int (main)(int argc, char **argv), int argc, char **argv);
 #define rb_main(argc, argv) rb_wasm_rt_start(rb_main, argc, argv)
 #endif
 
+#ifdef _WIN32
+#define main(argc, argv) w32_main(argc, argv)
+static int main(int argc, char **argv);
+int wmain(void) {return main(0, NULL);}
+#endif
+
 int
 main(int argc, char **argv)
 {
@@ -62,10 +68,6 @@ main(int argc, char **argv)
     return rb_main(argc, argv);
 }
 
-#ifdef _WIN32
-int wmain(void) {return main(0, NULL);}
-#endif
-
 #ifdef RUBY_ASAN_ENABLED
 /* Compile in the ASAN options Ruby needs, rather than relying on environment variables, so
  * that even tests which fork ruby with a clean environment will run ASAN with the right
diff --git a/win32/winmain.c b/win32/winmain.c
index 467a835d29..a9f38099db 100644
--- a/win32/winmain.c
+++ b/win32/winmain.c
@@ -1,10 +1,10 @@
 #include <windows.h>
 #include <stdio.h>
 
-extern int main(int, char**);
+extern int wmain(int, WCHAR**);
 
 int WINAPI
 WinMain(HINSTANCE current, HINSTANCE prev, LPSTR cmdline, int showcmd)
 {
-    return main(0, NULL);
+    return wmain(0, NULL);
 }