diff --git a/src/main.cpp b/src/main.cpp
index e910fbf..0d098b2 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -6,12 +6,12 @@
 #include <iostream>
 
 
-#define USE_GPU_ENGINE 0
-extern "C"
-{
-	__declspec(dllexport) unsigned long NvOptimusEnablement = USE_GPU_ENGINE;
-	__declspec(dllexport) int AmdPowerXpressRequestHighPerformance = USE_GPU_ENGINE;
+#if defined(_WIN32) || defined(_WIN64)
+extern "C" {
+    __declspec(dllexport) unsigned long NvOptimusEnablement = USE_GPU_ENGINE;
+    __declspec(dllexport) int AmdPowerXpressRequestHighPerformance = USE_GPU_ENGINE;
 }
+#endif
 
 
 static void key_callback(GLFWwindow *window, int key, int scancode, int action, int mods)
diff --git a/thirdparty/stb_image/include/stb_image/stb_image.h b/thirdparty/stb_image/include/stb_image/stb_image.h
index c0836cf..01eb7b3 100644
--- a/thirdparty/stb_image/include/stb_image/stb_image.h
+++ b/thirdparty/stb_image/include/stb_image/stb_image.h
@@ -337,6 +337,7 @@ RECENT REVISION HISTORY:
 //    very big.
 
 #include <memory>
+#include <cstring>
 
 inline void *STBIMAGE_CUSTOM_REALOC(void *p, size_t oldSize, size_t newsz)
 {