Patch to allow OSVR-Vive to compile on Linux (proper fix available here: https://github.com/ValveSoftware/openvr/pull/58)

openvr-header-workaround.patch

--- a/vendor/openvr/headers/openvr_driver.h	2016-05-31 23:20:57.457776648 -0500
+++ b/vendor/openvr/headers/openvr_driver.h	2016-05-31 23:26:23.908363307 -0500
@@ -859,15 +859,15 @@
 #pragma pack( pop )
 
 // figure out how to import from the VR API dll
-#if defined(_WIN32)
+//#if defined(_WIN32)
 
-#ifdef VR_API_EXPORT
-#define VR_INTERFACE extern "C" __declspec( dllexport )
-#else
-#define VR_INTERFACE extern "C" __declspec( dllimport )
-#endif
+//#ifdef VR_API_EXPORT
+//#define VR_INTERFACE extern "C" __declspec( dllexport )
+//#else
+//#define VR_INTERFACE extern "C" __declspec( dllimport )
+//#endif
 
-#elif defined(GNUC) || defined(COMPILER_GCC) || defined(__APPLE__)
+//#elif defined(GNUC) || defined(COMPILER_GCC) || defined(__APPLE__)
 
 #ifdef VR_API_EXPORT
 #define VR_INTERFACE extern "C" __attribute__((visibility("default")))
@@ -875,9 +875,9 @@
 #define VR_INTERFACE extern "C" 
 #endif
 
-#else
-#error "Unsupported Platform."
-#endif
+//#else
+//#error "Unsupported Platform."
+//#endif
 
 
 #if defined( _WIN32 )