8 files changed, 42 insertions, 2 deletions
diff --git a/LibOVR/Src/CAPI/CAPI_HMDState.cpp b/LibOVR/Src/CAPI/CAPI_HMDState.cpp
index fede019..375fff9 100755
--- a/LibOVR/Src/CAPI/CAPI_HMDState.cpp
+++ b/LibOVR/Src/CAPI/CAPI_HMDState.cpp
@@ -371,10 +371,12 @@ ovrTrackingState HMDState::PredictedTrackingState(double absTime, void*)
         ss.StatusFlags = 0;
     }
 
+#if !defined(HEADLESS_APP)
 #ifdef OVR_OS_WIN32
     // Set up display code for Windows
     Win32::DisplayShim::GetInstance().Active = (ss.StatusFlags & ovrStatus_HmdConnected) != 0;
 #endif
+#endif /* !defined(HEADLESS_APP) */
 
 
     return ss;
diff --git a/LibOVR/Src/Displays/OVR_Display.cpp b/LibOVR/Src/Displays/OVR_Display.cpp
index 7c74eee..2b899af 100755
--- a/LibOVR/Src/Displays/OVR_Display.cpp
+++ b/LibOVR/Src/Displays/OVR_Display.cpp
@@ -45,6 +45,25 @@ void Display::SetDirectDisplayInitialized(bool initialized)
     DirectDisplayInitialized = initialized;
 }
 
+#if defined(HEADLESS_APP)
+
+bool Display::Initialize()
+{
+    return true;
+}
+
+void Display::Shutdown()
+{
+}
+
+bool Display::InCompatibilityMode( bool displaySearch )
+{
+	OVR_UNUSED( displaySearch );
+    return true;
+}
+
+
+#endif /* defined(HEADLESS_APP) */
 
 //-----------------------------------------------------------------------------
 // EDID Parsing
diff --git a/LibOVR/Src/Net/OVR_BitStream.cpp b/LibOVR/Src/Net/OVR_BitStream.cpp
index 054f871..d7d5e73 100644
--- a/LibOVR/Src/Net/OVR_BitStream.cpp
+++ b/LibOVR/Src/Net/OVR_BitStream.cpp
@@ -27,6 +27,10 @@ limitations under the License.
 #include "OVR_BitStream.h"
 
 #ifdef OVR_OS_WIN32
+#if defined(_WINSOCKAPI_) && !defined(OVR_CC_MSVC) && !defined(_WINSOCK2API_)
+/** Silent warning using mingw64, _WINSOCKAPI_ is disabled in ./LibOVRKernel/Src/Kernel/OVR_Win32_IncludeWindows.h */
+#undef _WINSOCKAPI_
+#endif /* defined(_WINSOCKAPI_) && !defined(OVR_CC_MSVC) && !defined(_WINSOCK2API_) */
 #include <WinSock2.h>
 #else
 #include <arpa/inet.h>
diff --git a/LibOVR/Src/Net/OVR_BitStream.h b/LibOVR/Src/Net/OVR_BitStream.h
index 4e2d2ef..83c4a32 100644
--- a/LibOVR/Src/Net/OVR_BitStream.h
+++ b/LibOVR/Src/Net/OVR_BitStream.h
@@ -28,6 +28,9 @@ limitations under the License.
 #ifndef OVR_Bitstream_h
 #define OVR_Bitstream_h
 
+#if defined(OVR_CC_MSVC)
+#include <float.h>
+#endif
 #include <math.h>
 #include "Kernel/OVR_Types.h"
 #include "Kernel/OVR_Std.h"
@@ -1557,7 +1560,7 @@ void BitStream::WriteOrthMatrix(
 	if (qx < 0.0) qx=0.0;
 	if (qy < 0.0) qy=0.0;
 	if (qz < 0.0) qz=0.0;
-#ifdef OVR_OS_WIN32
+#if defined(OVR_OS_WIN32) && defined(OVR_CC_MSVC)
 	qx = _copysign( (double) qx, (double) (m21 - m12) );
 	qy = _copysign( (double) qy, (double) (m02 - m20) );
 	qz = _copysign( (double) qz, (double) (m10 - m01) );
diff --git a/LibOVR/Src/Net/OVR_Socket.h b/LibOVR/Src/Net/OVR_Socket.h
index df6407f..c1ea75c 100644
--- a/LibOVR/Src/Net/OVR_Socket.h
+++ b/LibOVR/Src/Net/OVR_Socket.h
@@ -36,6 +36,10 @@ limitations under the License.
 
 // OS-specific socket headers
 #if defined(OVR_OS_WIN32)
+#if defined(_WINSOCKAPI_) && !defined(OVR_CC_MSVC) && !defined(_WINSOCK2API_)
+/** Silent warning using mingw64, _WINSOCKAPI_ is disabled in ./LibOVRKernel/Src/Kernel/OVR_Win32_IncludeWindows.h */
+#undef _WINSOCKAPI_
+#endif /* defined(_WINSOCKAPI_) && !defined(OVR_CC_MSVC) && !defined(_WINSOCK2API_) */
 #include <WinSock2.h>
 #include <WS2tcpip.h>
 #include "Kernel/OVR_Win32_IncludeWindows.h"
diff --git a/LibOVR/Src/Net/OVR_Win32_Socket.cpp b/LibOVR/Src/Net/OVR_Win32_Socket.cpp
index 3cd2ada..7daebd5 100644
--- a/LibOVR/Src/Net/OVR_Win32_Socket.cpp
+++ b/LibOVR/Src/Net/OVR_Win32_Socket.cpp
@@ -30,6 +30,10 @@ limitations under the License.
 #include "Kernel/OVR_Threads.h" // Thread::MSleep
 #include "Kernel/OVR_Log.h"
 
+#if defined(_WINSOCKAPI_) && !defined(OVR_CC_MSVC) && !defined(_WINSOCK2API_)
+/** Silent warning using mingw64, _WINSOCKAPI_ is disabled in ./LibOVRKernel/Src/Kernel/OVR_Win32_IncludeWindows.h */
+#undef _WINSOCKAPI_
+#endif /* defined(_WINSOCKAPI_) && !defined(OVR_CC_MSVC) && !defined(_WINSOCK2API_) */
 #include <Winsock2.h>
 #pragma comment(lib, "ws2_32.lib")
 
diff --git a/LibOVR/Src/Net/OVR_Win32_Socket.h b/LibOVR/Src/Net/OVR_Win32_Socket.h
index ed0a624..94c34ef 100644
--- a/LibOVR/Src/Net/OVR_Win32_Socket.h
+++ b/LibOVR/Src/Net/OVR_Win32_Socket.h
@@ -31,6 +31,10 @@ limitations under the License.
 #include "OVR_Socket.h"
 #include "OVR_BitStream.h"
 
+#if defined(_WINSOCKAPI_) && !defined(OVR_CC_MSVC) && !defined(_WINSOCK2API_)
+/** Silent warning using mingw64, _WINSOCKAPI_ is disabled in ./LibOVRKernel/Src/Kernel/OVR_Win32_IncludeWindows.h */
+#undef _WINSOCKAPI_
+#endif /* defined(_WINSOCKAPI_) && !defined(OVR_CC_MSVC) && !defined(_WINSOCK2API_) */
 #include <WinSock2.h>
 #include <WS2tcpip.h>
 #include "Kernel/OVR_Win32_IncludeWindows.h"
diff --git a/LibOVR/Src/OVR_CAPI.cpp b/LibOVR/Src/OVR_CAPI.cpp
index e02151a..d06c885 100755
--- a/LibOVR/Src/OVR_CAPI.cpp
+++ b/LibOVR/Src/OVR_CAPI.cpp
@@ -272,7 +272,7 @@ OVR_PUBLIC_FUNCTION(ovrBool) ovr_Initialize(ovrInitParams const* params)
         goto Abort;
     }
 
-#if defined(OVR_OS_WIN32)
+#if defined(OVR_OS_WIN32) && !defined(HEADLESS_APP)
     // Older than Windows 7 SP1?
     if (!IsWindows7SP1OrGreater())
     {