From c4ed28aebb53935692abfd23bacf46cd1d68d61e Mon Sep 17 00:00:00 2001
From: Viktor Szakats <commit@vsz.me>
Date: Fri, 25 Jul 2025 15:48:35 +0200
Subject: [PATCH] windows: assume `ADDRESS_FAMILY`, drop feature checks

Early mingw-w64 releases missed it, but by requiring v3.0, this is no
longer an issue. Supported Visual Studio SDKs also offer it.

Follow-up to a28f5f68b965119d9dd1ab6c2a2ccc66c6ed5d1f #18010
Closes #18057
---
 CMake/win32-cache.cmake |  2 --
 CMakeLists.txt          |  6 +-----
 configure.ac            | 30 +++++++-----------------------
 lib/curl_config.h.cmake |  3 ---
 lib/curl_setup.h        |  6 +++---
 5 files changed, 11 insertions(+), 36 deletions(-)

diff --git a/CMake/win32-cache.cmake b/CMake/win32-cache.cmake
index cb2e45cf56..058c35dd8d 100644
--- a/CMake/win32-cache.cmake
+++ b/CMake/win32-cache.cmake
@@ -191,7 +191,6 @@ if(MINGW OR MSVC)
   curl_prefill_type_size("LONG_LONG" 8)
   curl_prefill_type_size("__INT64" 8)
   curl_prefill_type_size("CURL_OFF_T" 8)
-  curl_prefill_type_size("ADDRESS_FAMILY" 2)  # MSVC or mingw-w64 v2+
   # CURL_SOCKET_T, SIZE_T: 8 for _WIN64, 4 otherwise
   # TIME_T: 8 for _WIN64 or UCRT or MSVC and not Windows CE, 4 otherwise
   #   Also 4 for non-UCRT 32-bit when _USE_32BIT_TIME_T is set.
@@ -224,7 +223,6 @@ if(WINCE)
     set(HAVE_STRTOK_R 0)
     set(HAVE__SETMODE 0)
     set(HAVE_FILE_OFFSET_BITS 0)
-    set(HAVE_SIZEOF_ADDRESS_FAMILY 0)
     curl_prefill_type_size("SSIZE_T" 4)
     curl_prefill_type_size("OFF_T" 4)
   endif()
diff --git a/CMakeLists.txt b/CMakeLists.txt
index f3041b652d..8f93fe3e42 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1812,11 +1812,7 @@ if(HAVE_FSETXATTR)
 endif()
 
 cmake_push_check_state()
-if(WIN32)
-  list(APPEND CMAKE_EXTRA_INCLUDE_FILES "winsock2.h")
-  check_type_size("ADDRESS_FAMILY" SIZEOF_ADDRESS_FAMILY)
-  set(HAVE_ADDRESS_FAMILY ${HAVE_SIZEOF_ADDRESS_FAMILY})
-else()
+if(NOT WIN32)
   list(APPEND CMAKE_EXTRA_INCLUDE_FILES "sys/socket.h")
   check_type_size("sa_family_t" SIZEOF_SA_FAMILY_T)
   set(HAVE_SA_FAMILY_T ${HAVE_SIZEOF_SA_FAMILY_T})
diff --git a/configure.ac b/configure.ac
index 9b1096fcb9..d877d0e90d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -4045,30 +4045,14 @@ AC_CHECK_TYPE([bool],[
 #endif
 ])
 
-# check for sa_family_t
-AC_CHECK_TYPE(sa_family_t,
-  AC_DEFINE(HAVE_SA_FAMILY_T, 1, [Define to 1 if symbol `sa_family_t' exists]),
+if test "$curl_cv_native_windows" != 'yes'; then
+  # check for sa_family_t
+  AC_CHECK_TYPE(sa_family_t,
+    AC_DEFINE(HAVE_SA_FAMILY_T, 1, [Define to 1 if symbol `sa_family_t' exists]),,
   [
-  # The Windows name?
-  AC_CHECK_TYPE(ADDRESS_FAMILY,
-    AC_DEFINE(HAVE_ADDRESS_FAMILY, 1, [Define to 1 if symbol `ADDRESS_FAMILY' exists]),
-    [],
-    [
-#ifdef _WIN32
-#ifndef WIN32_LEAN_AND_MEAN
-#define WIN32_LEAN_AND_MEAN
-#endif
-#include <winsock2.h>
-#else
-#include <sys/socket.h>
-#endif
-    ])
-  ],
-[
-#ifndef _WIN32
-#include <sys/socket.h>
-#endif
-])
+  #include <sys/socket.h>
+  ])
+fi
 
 # check for suseconds_t
 AC_CHECK_TYPE([suseconds_t],[
diff --git a/lib/curl_config.h.cmake b/lib/curl_config.h.cmake
index 55701675e7..ca516710e4 100644
--- a/lib/curl_config.h.cmake
+++ b/lib/curl_config.h.cmake
@@ -336,9 +336,6 @@
 /* Define to 1 if symbol `sa_family_t' exists */
 #cmakedefine HAVE_SA_FAMILY_T 1
 
-/* Define to 1 if symbol `ADDRESS_FAMILY' exists */
-#cmakedefine HAVE_ADDRESS_FAMILY 1
-
 /* Define to 1 if you have the ioctlsocket function. */
 #cmakedefine HAVE_IOCTLSOCKET 1
 
diff --git a/lib/curl_setup.h b/lib/curl_setup.h
index b4205cf6f4..eb949dada5 100644
--- a/lib/curl_setup.h
+++ b/lib/curl_setup.h
@@ -937,10 +937,10 @@ endings either CRLF or LF so 't' is appropriate.
 
 /* for systems that do not detect this in configure */
 #ifndef CURL_SA_FAMILY_T
-#  ifdef HAVE_SA_FAMILY_T
-#    define CURL_SA_FAMILY_T sa_family_t
-#  elif defined(HAVE_ADDRESS_FAMILY)
+#  if defined(_WIN32) && !defined(UNDER_CE)
 #    define CURL_SA_FAMILY_T ADDRESS_FAMILY
+#  elif defined(HAVE_SA_FAMILY_T)
+#    define CURL_SA_FAMILY_T sa_family_t
 #  elif defined(__AMIGA__)
 #    define CURL_SA_FAMILY_T unsigned char
 #  else
-- 
2.47.2