mingw: use lower case windows.h

demo/win_service/client/main.cpp

@@ -1,6 +1,10 @@
 /// \brief To create a basic Windows command line program.
 
+#if defined(__MINGW32__)
+#include <windows.h>
+#else
 #include <Windows.h>
+#endif
 #include <tchar.h>
 #include <stdio.h>
 

demo/win_service/service/main.cpp

@@ -1,7 +1,11 @@
 /// \brief To create a basic Windows Service in C++.
 /// \see https://www.codeproject.com/Articles/499465/Simple-Windows-Service-in-Cplusplus
 
+#if defined(__MINGW32__)
+#include <windows.h>
+#else
 #include <Windows.h>
+#endif
 #include <tchar.h>
 #include <string>
 

src/libipc/platform/win/condition.h

@@ -4,7 +4,11 @@
 #include <string>
 #include <mutex>
 
+#if defined(__MINGW32__)
+#include <windows.h>
+#else
 #include <Windows.h>
+#endif
 
 #include "libipc/utility/log.h"
 #include "libipc/utility/scope_guard.h"

src/libipc/platform/win/mutex.h

@@ -3,7 +3,11 @@
 #include <cstdint>
 #include <system_error>
 
+#if defined(__MINGW32__)
+#include <windows.h>
+#else
 #include <Windows.h>
+#endif
 
 #include "libipc/utility/log.h"
 

src/libipc/platform/win/semaphore.h

@@ -2,7 +2,11 @@
 
 #include <cstdint>
 
+#if defined(__MINGW32__)
+#include <windows.h>
+#else
 #include <Windows.h>
+#endif
 
 #include "libipc/utility/log.h"
 

src/libipc/platform/win/shm_win.cpp

@@ -1,5 +1,9 @@
 
+#if defined(__MINGW32__)
+#include <windows.h>
+#else
 #include <Windows.h>
+#endif
 
 #include <string>
 #include <utility>

src/libipc/platform/win/to_tchar.h

@@ -1,6 +1,10 @@
 #pragma once
 
+#if defined(__MINGW32__)
+#include <windows.h>
+#else
 #include <Windows.h>
+#endif
 
 #include <type_traits>
 #include <string>

test/test_sync.cpp

@@ -37,7 +37,11 @@ TEST(PThread, Robust) {
     pthread_mutex_destroy(&mutex);
 }
 #elif defined(IPC_OS_WINDOWS_)
+#if defined(__MINGW32__)
+#include <windows.h>
+#else
 #include <Windows.h>
+#endif
 #include <tchar.h>
 
 TEST(PThread, Robust) {