From 684c9b82b9b8216f406c59deb35cd727ffb6d69b Mon Sep 17 00:00:00 2001
From: Thiago Macieira <thiago.macieira@intel.com>
Date: Tue, 28 Sep 2021 17:10:11 -0700
Subject: [PATCH] QDateTime: fix build with MinGW: need unistd.h very early

qobject.h has #include <chrono>, which #includes <ctime>, which includes
<time.h>.

datetime.cpp:2621:23: error: 'localtime_r' was not declared in this scope; did you mean 'localtime_s'?

Pick-to: 6.2
Change-Id: I2bbf422288924c198645fffd16a922719c4ce7d4
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
---
 mkspecs/win32-g++/qplatformdefs.h | 2 ++
 src/corelib/time/qdatetime.cpp    | 3 ---
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/mkspecs/win32-g++/qplatformdefs.h b/mkspecs/win32-g++/qplatformdefs.h
index c5a70b1445e..e9ced3732ad 100644
--- a/mkspecs/win32-g++/qplatformdefs.h
+++ b/mkspecs/win32-g++/qplatformdefs.h
@@ -46,6 +46,8 @@
 #endif
 #endif
 
+#include <unistd.h> // Defines _POSIX_THREAD_SAFE_FUNCTIONS and others
+
 // Get Qt defines/settings
 
 #include "qglobal.h"
diff --git a/src/corelib/time/qdatetime.cpp b/src/corelib/time/qdatetime.cpp
index 7ee38656112..ab3d923ef96 100644
--- a/src/corelib/time/qdatetime.cpp
+++ b/src/corelib/time/qdatetime.cpp
@@ -66,9 +66,6 @@
 #  include <qt_windows.h>
 #endif
 #include <time.h>
-#ifdef Q_CC_MINGW
-#  include <unistd.h> // Define _POSIX_THREAD_SAFE_FUNCTIONS to obtain localtime_r()
-#endif
 
 QT_BEGIN_NAMESPACE