From 655defed2842ab5984110b23731ea4871462c33b Mon Sep 17 00:00:00 2001
From: Christopher Bruns <cmbruns@rotatingpenguin.com>
Date: Wed, 30 Dec 2015 17:54:54 -0500
Subject: [PATCH] Avoid compile errors on Linux. Fixes #107.

---
 src/gl/stereo3d/gl_stereo3d.cpp     | 2 +-
 src/gl/stereo3d/gl_stereo3d.h       | 1 +
 src/gl/stereo3d/gl_stereo_cvars.cpp | 2 +-
 3 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/gl/stereo3d/gl_stereo3d.cpp b/src/gl/stereo3d/gl_stereo3d.cpp
index bc006a2f90..6e4a4a376f 100644
--- a/src/gl/stereo3d/gl_stereo3d.cpp
+++ b/src/gl/stereo3d/gl_stereo3d.cpp
@@ -11,7 +11,7 @@ VSMatrix EyePose::GetProjection(FLOATTYPE fov, FLOATTYPE aspectRatio, FLOATTYPE
 	VSMatrix result;
 
 	// Lifted from gl_scene.cpp FGLRenderer::SetProjection()
-	float fovy = 2 * RAD2DEG(atan(tan(DEG2RAD(fov) / 2) / fovRatio));
+	float fovy = (float)(2 * RAD2DEG(atan(tan(DEG2RAD(fov) / 2) / fovRatio)));
 	result.perspective(fovy, aspectRatio, 5.f, 65536.f);
 
 	return result;
diff --git a/src/gl/stereo3d/gl_stereo3d.h b/src/gl/stereo3d/gl_stereo3d.h
index 8cfe886aca..44a76839e5 100644
--- a/src/gl/stereo3d/gl_stereo3d.h
+++ b/src/gl/stereo3d/gl_stereo3d.h
@@ -2,6 +2,7 @@
 #define GL_STEREO3D_H_
 
 #include <vector>
+#include <cstring> // needed for memcpy on linux, which is needed by VSMatrix copy ctor
 #include "gl/data/gl_matrix.h"
 
 
diff --git a/src/gl/stereo3d/gl_stereo_cvars.cpp b/src/gl/stereo3d/gl_stereo_cvars.cpp
index b91a47daa3..7fc2941d57 100644
--- a/src/gl/stereo3d/gl_stereo_cvars.cpp
+++ b/src/gl/stereo3d/gl_stereo_cvars.cpp
@@ -14,7 +14,7 @@ CVAR(Float, vr_hunits_per_meter, 41.0f, CVAR_ARCHIVE | CVAR_GLOBALCONFIG) // MET
 namespace s3d {
 
 // Initialize static member
-Stereo3DMode const * Stereo3DMode::currentStereo3DMode = nullptr;
+Stereo3DMode const * Stereo3DMode::currentStereo3DMode = 0; // "nullptr" not resolved on linux (presumably not C++11)
 
 /* static */
 void Stereo3DMode::setCurrentMode(const Stereo3DMode& mode) {