From 4ef16f1f474787ac739717359c19885d1c6443d9 Mon Sep 17 00:00:00 2001
From: Matthias Naegler <matthias.naegler@auvesy.de>
Date: Wed, 8 Jul 2020 14:14:53 +0200
Subject: [PATCH] cmake: fix windows xp build

Reviewed-by: Marcel Raad
Closes #5662
---
 CMakeLists.txt | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5a1333397f..919cfcd243 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -82,12 +82,15 @@ if(WIN32)
   set(CURL_TARGET_WINDOWS_VERSION "" CACHE STRING "Minimum target Windows version as hex string")
   if(CURL_TARGET_WINDOWS_VERSION)
     add_definitions(-D_WIN32_WINNT=${CURL_TARGET_WINDOWS_VERSION})
+    set(CMAKE_REQUIRED_DEFINITIONS "${CMAKE_REQUIRED_DEFINITIONS} -D_WIN32_WINNT=${CURL_TARGET_WINDOWS_VERSION}")
   elseif(ENABLE_INET_PTON)
     # _WIN32_WINNT_VISTA (0x0600)
     add_definitions(-D_WIN32_WINNT=0x0600)
+    set(CMAKE_REQUIRED_DEFINITIONS "${CMAKE_REQUIRED_DEFINITIONS} -D_WIN32_WINNT=0x0600")
   else()
     # _WIN32_WINNT_WINXP (0x0501)
     add_definitions(-D_WIN32_WINNT=0x0501)
+    set(CMAKE_REQUIRED_DEFINITIONS "${CMAKE_REQUIRED_DEFINITIONS} -D_WIN32_WINNT=0x0501")
   endif()
 endif()
 option(CURL_LTO "Turn on compiler Link Time Optimizations" OFF)