What it does is writes out a stub executable and then tacks all of the program data onto the end of it. To check if the app is 64-bit, use the Target64bit compiler constant.įor 64-bit builds, the compiler places some framework DLLs next to the executable and not into the 'MyApplication Libs' (or just 'Libs') folder like it did for 32-bit builds.Ī little history: For 32-bit Windows builds, the compiler doesn't actually spit out a native PE32 file. This constant is indicating that the Win32 API is being used and is not an indicator of 32-bit or 64-bit systems. Keep in mind that the TargetWin32 compiler constant returns True on Windows, regardless of whether the app is 32-bit or 64-bit. This means you will likely need to create both 32-bit and 64-bit versions of your Windows apps so that your users can choose the appropriate one for their version of Windows. The 32-bit version of Windows cannot run 64-bit apps, but the 64-bit version of Windows can run both 32-bit and 64-bit apps. Windows is available in both 32-bit and 64-bit versions. If you want your apps to work on Catalina you must build them as 64-bit. MacOS Catalina (10.15) removed support for running 32-bit apps. Simply create a 64-bit app and make that available to your users. If your app is working properly as a 64-bit app, then you have no reason to continue creating 32-bit apps. The type of app you need to build for your users varies based on the operating systems you need to support.Īll versions of macOS supported by Xojo are already 64-bit. Similarly, a 32-bit app cannot use 64-bit libraries. Declaring to a 32-bit library from a 64-bit app will fail.

For these situations you should use the CGFloat data type.Ī 64-bit app can only use 64-bit libraries. The 32-bit libraries use Single, but the 64-bit libraries use Double. On Mac, some macOS Cocoa declares require a floating-point number. To simplify this, use the Integer data type which is an alias to Int32 in 32-bit apps and Int64 in 64-bit apps. In particular, if a Declare is using a specific Integer type, such as Int32, it may be possible that the library requires you to use Int64 in a 64-bit app. In general, you'll want to review any Declares that are used in your project. In a 32-bit app, the Integer data type is an alias for Int32 and UInteger is an alias for UInt32. In a 64-bit app, the Integer data type is an alias for Int64 and UInteger is an alias for UInt64. Use these two compiler constants to determine the architecture of the app. In a 64-bit app, Target64Bit returns True and Target32Bit returns False. In a 32-bit app, Target32Bit returns True and Target64Bit returns False. To make better use of hardware resources, the LLVM compiler uses multiple CPU cores when compiling for 64-bit (or ARM).

Mediacoder x64 user guide