diff --git a/src/bmp.cpp b/src/bmp.cpp
index 6a2b317..30906bf 100644
--- a/src/bmp.cpp
+++ b/src/bmp.cpp
@@ -82,6 +82,9 @@ readBMP(const char *afilename)
 	StreamMemory file;
 	int i, x, y;
 
+	bool32 noalpha;
+	int pad;
+
 	filename = Image::getFilename(afilename);
 	if(filename == nil)
 		return nil;
@@ -103,7 +106,7 @@ readBMP(const char *afilename)
 		dib.paletteLen = 0;
 	}
 
-	bool32 noalpha = true;
+	noalpha = true;
 
 	// Recognize 32 bit formats
 	if(dib.compression == 3){
@@ -138,7 +141,7 @@ readBMP(const char *afilename)
 
 	file.seek(bmp.offset, 0);
 
-	int pad = image->width*image->bpp % 4;
+	pad = image->width*image->bpp % 4;
 
 	uint8 *px, *line;
 	line = image->pixels + (image->height-1)*image->stride;
diff --git a/src/charset.cpp b/src/charset.cpp
index e08d423..a16cb0c 100644
--- a/src/charset.cpp
+++ b/src/charset.cpp
@@ -143,7 +143,7 @@ Charset::printChar(uint32 c, int32 x, int32 y)
 	RWDEVICE::Im2DVertex *vert;
 	uint16 *ix;
 
-	if(c >= this->desc.count)
+	if((int32)c >= this->desc.count)
 		return;
 
 	if(this->raster != lastRaster || numChars >= NUMCHARS)
diff --git a/src/d3d/rwxbox.h b/src/d3d/rwxbox.h
index 848bfb9..92fd71c 100644
--- a/src/d3d/rwxbox.h
+++ b/src/d3d/rwxbox.h
@@ -96,7 +96,7 @@ Texture *readNativeTexture(Stream *stream);
 void writeNativeTexture(Texture *tex, Stream *stream);
 uint32 getSizeNativeTexture(Texture *tex);
 
-enum {
+enum : uint32 {
 	D3DFMT_UNKNOWN              = 0xFFFFFFFF,
 
 	/* Swizzled formats */
diff --git a/src/geometry.cpp b/src/geometry.cpp
index e5994c7..85a917b 100644
--- a/src/geometry.cpp
+++ b/src/geometry.cpp
@@ -497,7 +497,7 @@ Geometry::generateTriangles(int8 *adc)
 static void
 dumpMesh(Mesh *m)
 {
-	for(int32 i = 0; i < m->numIndices-2; i++) 
+	for(uint32 i = 0; i < m->numIndices-2; i++) 
 //		if(i % 2)
 //			printf("%3d %3d %3d\n",
 //				m->indices[i+1],
diff --git a/src/gl/gl3device.cpp b/src/gl/gl3device.cpp
index 0bad8f6..328f171 100644
--- a/src/gl/gl3device.cpp
+++ b/src/gl/gl3device.cpp
@@ -25,13 +25,14 @@
 
 namespace rw {
 namespace gl3 {
-
+#ifndef LIBRW_SDL2
 struct DisplayMode
 {
 	GLFWvidmode mode;
 	int32 depth;
 	uint32 flags;
 };
+#endif
 
 struct GlGlobals
 {
@@ -48,13 +49,13 @@ struct GlGlobals
 	DisplayMode *modes;
 	int numModes;
 	int currentMode;
+	GLFWwindow **pWindow;
 #endif
 	int presentWidth, presentHeight;
 
 	// for opening the window
 	int winWidth, winHeight;
 	const char *winTitle;
-	GLFWwindow **pWindow;
 } glGlobals;
 
 struct UniformState
diff --git a/src/gl/rwgl3.h b/src/gl/rwgl3.h
index 210d7cf..09772d7 100644
--- a/src/gl/rwgl3.h
+++ b/src/gl/rwgl3.h
@@ -14,6 +14,7 @@ struct EngineOpenParams
 {
 #ifdef LIBRW_SDL2
 	SDL_Window **window;
+	bool32 fullscreen;
 #else
 	GLFWwindow **window;
 #endif
diff --git a/src/image.cpp b/src/image.cpp
index 7521595..6a350a4 100644
--- a/src/image.cpp
+++ b/src/image.cpp
@@ -475,7 +475,7 @@ static char*
 rwstrdup(const char *s)
 {
 	char *t;
-	int32 len = strlen(s)+1;
+	size_t len = strlen(s)+1;
 	t = (char*)rwMalloc(len, MEMDUR_EVENT);
 	if(t)
 		memcpy(t, s, len);
diff --git a/src/rwobjects.h b/src/rwobjects.h
index 8a33cc8..b8a1b5b 100644
--- a/src/rwobjects.h
+++ b/src/rwobjects.h
@@ -198,7 +198,7 @@ struct Raster
 	void destroy(void);
 	static bool32 imageFindRasterFormat(Image *image, int32 type,
 		int32 *pWidth, int32 *pHeight, int32 *pDepth, int32 *pFormat, int32 platform = 0);
-	Raster *Raster::setFromImage(Image *image, int32 platform = 0);
+	Raster *setFromImage(Image *image, int32 platform = 0);
 	static Raster *createFromImage(Image *image, int32 platform = 0);
 	Image *toImage(void);
 	uint8 *lock(int32 level, int32 lockMode);
diff --git a/src/uvanim.cpp b/src/uvanim.cpp
index 05e2fba..00fd8fd 100644
--- a/src/uvanim.cpp
+++ b/src/uvanim.cpp
@@ -240,8 +240,8 @@ uvAnimParamInterpCB(void *out, void *in1, void *in2, float32 t, void *custom)
 	float32 f = (t - kf1->time) / (kf2->time - kf1->time);
 
 	float32 a = kf2->uv[0] - kf1->uv[0];
-	while(a < M_PI) a += 2*M_PI;
-	while(a > M_PI) a -= 2*M_PI;
+	while(a < (float)M_PI) a += 2 * (float)M_PI;
+	while(a > (float)M_PI) a -= 2 * (float)M_PI;
 	intf->uv[0] = a*f + kf1->uv[0];
 	intf->uv[1] = (kf2->uv[1] - kf1->uv[1])*f + kf1->uv[1];
 	intf->uv[2] = (kf2->uv[2] - kf1->uv[2])*f + kf1->uv[2];
diff --git a/tools/clumpview/ras_test.cpp b/tools/clumpview/ras_test.cpp
index d5c0435..6e17310 100644
--- a/tools/clumpview/ras_test.cpp
+++ b/tools/clumpview/ras_test.cpp
@@ -287,11 +287,11 @@ putpixel(Canvas *canvas, Point3 p, Color c)
 		case DEPTHTEST_ALWAYS:
 			break;
 		case DEPTHTEST_GEQUAL:
-			if(p.z < *z)
+			if(p.z < (int)*z)
 				return;
 			break;
 		case DEPTHTEST_GREATER:
-			if(p.z <= *z)
+			if(p.z <= (int)*z)
 				return;
 			break;
 		}