From 5ea683f20275bf2cae4eaaec8fa85f269706810b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=96=B0=E6=97=A0=E6=AD=A2=E7=AB=9E=E5=8D=9A=E5=AE=A2?=
 <648318466@qq.com>
Date: Tue, 24 Mar 2020 19:17:00 +0800
Subject: [PATCH] Fix ncnn error in MinGW compilation of windows system (#1645)

---
 src/platform.h.in | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/platform.h.in b/src/platform.h.in
index 707b10af0..804c218a8 100644
--- a/src/platform.h.in
+++ b/src/platform.h.in
@@ -25,7 +25,7 @@
 #cmakedefine01 NCNN_REQUANT
 #cmakedefine01 NCNN_AVX2
 
-#ifdef _WIN32
+#if (defined _WIN32 && !(defined __MINGW32__))
 #define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 #include <process.h>
@@ -39,7 +39,7 @@
 
 namespace ncnn {
 
-#ifdef _WIN32
+#if (defined _WIN32 && !(defined __MINGW32__))
 class Mutex
 {
 public:
@@ -75,7 +75,7 @@ private:
     Mutex& mutex;
 };
 
-#if _WIN32
+#if (defined _WIN32 && !(defined __MINGW32__))
 class ConditionVariable
 {
 public:
@@ -101,7 +101,7 @@ private:
 };
 #endif // _WIN32
 
-#if _WIN32
+#if (defined _WIN32 && !(defined __MINGW32__))
 static unsigned __stdcall start_wrapper(void* args);
 class Thread
 {