From 0316c8c5aeaf692dc460b7aaeeef18d8e892f0a8 Mon Sep 17 00:00:00 2001
From: thunder2 <thunder2@users.sourceforge.net>
Date: Mon, 6 Mar 2017 06:34:06 +0100
Subject: [PATCH] Added workaround for crash on Windows 7 for Qt versions with
 gcc 5.3.0. The call to GetProcAddress in openssl (cryptlib.c) finds an
 function pointer to the not existing function _OPENSSL_isservice in the
 executable running on Windows 7.

---
 retroshare-gui/src/main.cpp | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/retroshare-gui/src/main.cpp b/retroshare-gui/src/main.cpp
index 88c947aa0..ad618d3bc 100644
--- a/retroshare-gui/src/main.cpp
+++ b/retroshare-gui/src/main.cpp
@@ -59,6 +59,23 @@
 #endif
 #endif
 
+#ifdef Q_OS_WIN
+#if QT_VERSION >= QT_VERSION_CHECK (5, 7, 0)
+// see INSTALL.W32 in openssl
+// Needed as workaround for gcc 5.3.0 because the call to GetProcAddress in cryptlib.c finds an function pointer
+// to the not existing function _OPENSSL_isservice in the executable running on Windows 7.
+extern "C" {
+__declspec(dllexport) __cdecl BOOL _OPENSSL_isservice(void)
+{
+	DWORD sess;
+	if (ProcessIdToSessionId(GetCurrentProcessId(),&sess))
+		return sess==0;
+	return FALSE;
+}
+}
+#endif
+#endif
+
 /*** WINDOWS DON'T LIKE THIS - REDEFINES VER numbers.
 #include <gui/qskinobject/qskinobject.h>
 ****/