[project/Win32BuildSetup] Fix Windows ARM64 detection. Add prompts when attempting to install x86 or x64 on ARM64 machine. Specify minimum NSIS version in documentation.

Author: ddscentral

docs/README.Windows.md

@@ -55,7 +55,7 @@ To build Kodi:
 * **[CMake](https://cmake.org/download/)** (version 3.20 or greater is required to build Kodi, version 3.21 or greater to build with Visual Studio 2022)
 * **[Git for Windows](https://gitforwindows.org/)**
 * **[Java Runtime Environment (JRE)](http://www.oracle.com/technetwork/java/javase/downloads/index.html)**
-* **[Nullsoft scriptable install system (NSIS)](http://nsis.sourceforge.net/Download)** (Only needed if you want to generate an installer file)
+* **[Nullsoft scriptable install system (NSIS)](http://nsis.sourceforge.net/Download)** version 3.04 or greater (Only needed if you want to generate an installer file)
 * **[Visual Studio 2022](https://visualstudio.microsoft.com/downloads/)** or **[Visual Studio 2019](https://visualstudio.microsoft.com/vs/older-downloads/)** (Community Edition is fine)
 
 To run Kodi you need a relatively recent CPU with integrated GPU or discrete GPU with up-to-date graphics device-drivers installed from the manufacturer's website.

project/Win32BuildSetup/genNsisInstaller.nsi

@@ -21,6 +21,8 @@
   ;Default installation folder
 !ifdef x64
   InstallDir "$PROGRAMFILES64\${APP_NAME}"
+!else ifdef arm64
+  InstallDir "$PROGRAMFILES64\${APP_NAME}"
 !else
   InstallDir "$PROGRAMFILES\${APP_NAME}"
 !endif
@@ -348,12 +350,32 @@ Function .onInit
       MessageBox MB_OK|MB_ICONSTOP 'This is the 64-bit ${APP_NAME} installer.$\nPlease download the 32-bit version from ${WEBSITE}.$\n$\nClick Ok to quit Setup.'
       Quit
     ${Endif}
+
+    ; x64 will run in emulation on ARM64
+    ${If} ${IsNativeARM64}
+      MessageBox MB_YESNO|MB_ICONEXCLAMATION|MB_DEFBUTTON2 'There is a specific ARM64 ${APP_NAME} version available for download. Please consider installing the ARM64 version instead.$\nFor details visit ${WEBSITE}.$\nProceed with x64 installation anyway?' /SD IDYES IDYES noprobx64arm
+      Quit
+      noprobx64arm:
+    ${Endif} 
+  !else ifdef arm64
+    SetRegView 64
+    ${IfNot} ${IsNativeARM64}
+      MessageBox MB_OK|MB_ICONSTOP 'This is the ARM64 ${APP_NAME} installer.$\nPlease download the x86 or x64 version from ${WEBSITE}.$\n$\nClick Ok to quit Setup.'
+      Quit
+    ${Endif}  
   !else
-    ${If} ${RunningX64}
-      MessageBox MB_YESNO|MB_ICONEXCLAMATION|MB_DEFBUTTON2 'There is a specific 64-bit ${APP_NAME} version available for download. Please consider installing the 64-bit version instead.$\nFor details visit ${WEBSITE}.$\nProceed with 32-bit installation anyway?' /SD IDYES IDYES noprob
+    ; x86 will run in emulation on ARM64
+    ${If} ${IsNativeARM64}
+      MessageBox MB_YESNO|MB_ICONEXCLAMATION|MB_DEFBUTTON2 'There is a specific ARM64 ${APP_NAME} version available for download. Please consider installing the ARM64 version instead.$\nFor details visit ${WEBSITE}.$\nProceed with x86 installation anyway?' /SD IDYES IDYES noprobx86arm
       Quit
-      noprob:
-    ${Endif}
+      noprobx86arm:
+    ${Else}
+      ${If} ${RunningX64}
+        MessageBox MB_YESNO|MB_ICONEXCLAMATION|MB_DEFBUTTON2 'There is a specific 64-bit ${APP_NAME} version available for download. Please consider installing the 64-bit version instead.$\nFor details visit ${WEBSITE}.$\nProceed with 32-bit installation anyway?' /SD IDYES IDYES noprobx86x64
+        Quit
+        noprobx86x64:
+      ${Endif}
+    ${Endif}  
   !endif
 
   ; Windows 8.1 is minimum requirement