[libev] Fix build on windows (#39985)

ports/libev/0000-event-fix-undefined-struct-timeval.patch

@@ -0,0 +1,14 @@
+diff --git a/event.c b/event.c
+index 5586cd3..a67ca54 100644
+--- a/event.c
++++ b/event.c
+@@ -40,6 +40,9 @@
+ #include <stddef.h>
+ #include <stdlib.h>
+ #include <assert.h>
++#ifdef _WIN32
++#include <winsock2.h>
++#endif
+ 
+ #ifdef EV_EVENT_H
+ # include EV_EVENT_H

ports/libev/portfile.cmake

@@ -7,11 +7,19 @@ vcpkg_download_distfile(ARCHIVE
 vcpkg_extract_source_archive(
     SOURCE_PATH
     ARCHIVE "${ARCHIVE}"
+    PATCHES "0000-event-fix-undefined-struct-timeval.patch"
 )
 
+set(LIBEV_LINK_FLAGS "")
+
+if(VCPKG_TARGET_IS_WINDOWS)
+    list(APPEND LIBEV_LINK_FLAGS "LDFLAGS=-no-undefined -lws2_32 \$LDFLAGS")
+endif()
+
 vcpkg_configure_make(
     SOURCE_PATH "${SOURCE_PATH}"
     AUTOCONFIG
+    OPTIONS ${LIBEV_LINK_FLAGS}
 )
 
 vcpkg_install_make()

ports/libev/vcpkg.json

@@ -1,9 +1,8 @@
 {
   "name": "libev",
   "version": "4.33",
-  "port-version": 2,
+  "port-version": 3,
   "description": "libev is a high-performance event loop/event model with lots of features.",
   "homepage": "http://software.schmorp.de/pkg/libev.html",
-  "license": "BSD-2-Clause OR GPL-2.0-or-later",
-  "supports": "!windows"
+  "license": "BSD-2-Clause OR GPL-2.0-or-later"
 }

versions/baseline.json

@@ -4414,7 +4414,7 @@
     },
     "libev": {
       "baseline": "4.33",
-      "port-version": 2
+      "port-version": 3
     },
     "libevent": {
       "baseline": "2.1.12+20230128",

versions/l-/libev.json

@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "048b4e081061376e4e6fdcd18670669162f79c7a",
+      "version": "4.33",
+      "port-version": 3
+    },
     {
       "git-tree": "1287c21bdb7398762b3906c5daaab7b537bea188",
       "version": "4.33",