Automated platform detection using predefined macro's

Hazel/src/Hazel/Core/Core.h

@@ -2,19 +2,62 @@
 
 #include <memory>
 
-#ifdef HZ_PLATFORM_WINDOWS
-#if HZ_DYNAMIC_LINK
-	#ifdef HZ_BUILD_DLL
-		#define HAZEL_API __declspec(dllexport)
+// Platform detection using predefined macros
+#ifdef _WIN32
+	/* Windows x64/x86 */
+	#ifdef _WIN64
+		/* Windows x64  */
+		#define HZ_PLATFORM_WINDOWS
+	#else
+		/* Windows x86 */
+		#error "x86 Builds are not supported!"
+	#endif
+#elif defined(__APPLE__) || defined(__MACH__)
+	#include <TargetConditionals.h>
+	/* TARGET_OS_MAC exists on all the platforms
+	 * so we must check all of them (in this order)
+	 * to ensure that we're running on MAC
+	 * and not some other Apple platform */
+	#if TARGET_IPHONE_SIMULATOR == 1
+		#error "IOS simulator is not supported!"
+	#elif TARGET_OS_IPHONE == 1
+		#define HZ_PLATFORM_IOS
+		#error "IOS is not supported!"
+	#elif TARGET_OS_MAC == 1
+		#define HZ_PLATFORM_MACOS
+		#error "MacOS is not supported!"
 	#else
-		#define HAZEL_API __declspec(dllimport)
+		#error "Unknown Apple platform!"
 	#endif
+/* We also have to check __ANDROID__ before __linux__
+ * since android is based on the linux kernel
+ * it has __linux__ defined */
+#elif defined(__ANDROID__)
+	#define HZ_PLATFORM_ANDROID
+	#error "Android is not supported!"
+#elif defined(__linux__)
+	#define HZ_PLATFORM_LINUX
+	#error "Linux is not supported!"
 #else
-    #define HAZEL_API
-#endif
+	/* Unknown compiler/platform */
+	#error "Unknown platform!"
+#endif // End of platform detection
+
+
+// DLL support
+#ifdef HZ_PLATFORM_WINDOWS
+	#if HZ_DYNAMIC_LINK
+		#ifdef HZ_BUILD_DLL
+			#define HAZEL_API __declspec(dllexport)
+		#else
+			#define HAZEL_API __declspec(dllimport)
+		#endif
+	#else
+		#define HAZEL_API
+	#endif
 #else
 	#error Hazel only supports Windows!
-#endif
+#endif // End of DLL support
 
 #ifdef HZ_DEBUG
 	#define HZ_ENABLE_ASSERTS

premake5.lua

@@ -83,7 +83,6 @@ project "Hazel"
 
 		defines
 		{
-			"HZ_PLATFORM_WINDOWS",
 			"HZ_BUILD_DLL",
 			"GLFW_INCLUDE_NONE"
 		}
@@ -134,12 +133,7 @@ project "Sandbox"
 
 	filter "system:windows"
 		systemversion "latest"
-
-		defines
-		{
-			"HZ_PLATFORM_WINDOWS"
-		}
-
+
 	filter "configurations:Debug"
 		defines "HZ_DEBUG"
 		runtime "Debug"