Add standalone test for all possible MinGW exe entry points

test/standalone.zig

@@ -195,6 +195,10 @@ pub const build_cases = [_]BuildCase{
         .build_root = "test/standalone/windows_resources",
         .import = @import("standalone/windows_resources/build.zig"),
     },
+    .{
+        .build_root = "test/standalone/windows_entry_points",
+        .import = @import("standalone/windows_entry_points/build.zig"),
+    },
     .{
         .build_root = "test/standalone/windows_spawn",
         .import = @import("standalone/windows_spawn/build.zig"),

test/standalone/windows_entry_points/build.zig

@@ -0,0 +1,68 @@
+const std = @import("std");
+
+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 = .x86_64,
+        .os_tag = .windows,
+        .abi = .gnu,
+    });
+
+    {
+        const exe = b.addExecutable(.{
+            .name = "main",
+            .target = target,
+            .optimize = .Debug,
+            .link_libc = true,
+        });
+        exe.addCSourceFile(.{ .file = .{ .path = "main.c" } });
+
+        _ = exe.getEmittedBin();
+        test_step.dependOn(&exe.step);
+    }
+
+    {
+        const exe = b.addExecutable(.{
+            .name = "wmain",
+            .target = target,
+            .optimize = .Debug,
+            .link_libc = true,
+        });
+        exe.mingw_unicode_entry_point = true;
+        exe.addCSourceFile(.{ .file = .{ .path = "wmain.c" } });
+
+        _ = exe.getEmittedBin();
+        test_step.dependOn(&exe.step);
+    }
+
+    {
+        const exe = b.addExecutable(.{
+            .name = "winmain",
+            .target = target,
+            .optimize = .Debug,
+            .link_libc = true,
+        });
+        // Note: `exe.subsystem = .Windows;` is not necessary
+        exe.addCSourceFile(.{ .file = .{ .path = "winmain.c" } });
+
+        _ = exe.getEmittedBin();
+        test_step.dependOn(&exe.step);
+    }
+
+    {
+        const exe = b.addExecutable(.{
+            .name = "wwinmain",
+            .target = target,
+            .optimize = .Debug,
+            .link_libc = true,
+        });
+        exe.mingw_unicode_entry_point = true;
+        // Note: `exe.subsystem = .Windows;` is not necessary
+        exe.addCSourceFile(.{ .file = .{ .path = "wwinmain.c" } });
+
+        _ = exe.getEmittedBin();
+        test_step.dependOn(&exe.step);
+    }
+}

test/standalone/windows_entry_points/main.c

@@ -0,0 +1,6 @@
+#include <stdio.h>
+
+int main(int argc, char *argv[ ], char *envp[ ]) {
+    printf("hello from main\n");
+    return 0;
+}

test/standalone/windows_entry_points/winmain.c

@@ -0,0 +1,7 @@
+#include <windows.h>
+#include <stdio.h>
+
+int APIENTRY WinMain(HINSTANCE hInst, HINSTANCE hInstPrev, PSTR cmdline, int cmdshow) {
+    printf("hello from WinMain\n");
+    return 0;
+}

test/standalone/windows_entry_points/wmain.c

@@ -0,0 +1,7 @@
+#include <stdio.h>
+#include <windows.h>
+
+int wmain(int argc, wchar_t *argv[ ], wchar_t *envp[ ]) {
+    printf("hello from wmain\n");
+    return 0;
+}

test/standalone/windows_entry_points/wwinmain.c

@@ -0,0 +1,7 @@
+#include <windows.h>
+#include <stdio.h>
+
+int APIENTRY wWinMain(HINSTANCE hInst, HINSTANCE hInstPrev, PWSTR cmdline, int cmdshow) {
+    printf("hello from wWinMain\n");
+    return 0;
+}