From 3ee0afb2a15ccb6862f780ab381b723f6ae2b03b Mon Sep 17 00:00:00 2001
From: Tres Finocchiaro <tres.finocchiaro@gmail.com>
Date: Thu, 9 Jan 2025 23:34:33 -0500
Subject: [PATCH] Add support for MSYS2 CLANGARM64

Adds initial Windows ARM64 support
---
 cmake/modules/DetectMachine.cmake | 16 +++++++++-------
 cmake/nsis/CMakeLists.txt         |  6 +++++-
 2 files changed, 14 insertions(+), 8 deletions(-)

diff --git a/cmake/modules/DetectMachine.cmake b/cmake/modules/DetectMachine.cmake
index b9aa4c8c6e5..8d6b84af40f 100644
--- a/cmake/modules/DetectMachine.cmake
+++ b/cmake/modules/DetectMachine.cmake
@@ -77,13 +77,15 @@ IF(WIN32)
 		unset(MSVC_VER)
 	else()
 		# Cross-compiled
-		# TODO: Handle Windows ARM64 targets
-		IF(WIN64)
-			SET(IS_X86_64 TRUE)
-			SET(LMMS_BUILD_WIN64 TRUE)
-		ELSE(WIN64)
-			SET(IS_X86 TRUE)
-		ENDIF(WIN64)
+		if($ENV{MSYSTEM_CARCH} MATCHES "aarch64")
+			set(IS_ARM64 TRUE)
+			set(LMMS_BUILD_WIN64 TRUE)
+		elseif(WIN64)
+			set(IS_X86_64 TRUE)
+			set(LMMS_BUILD_WIN64 TRUE)
+		else()
+			set(IS_X86 TRUE)
+		endif()
 	endif()
 ELSE()
 	# Detect target architecture based on compiler target triple e.g. "x86_64-pc-linux"
diff --git a/cmake/nsis/CMakeLists.txt b/cmake/nsis/CMakeLists.txt
index e926e074d76..8363cacf709 100644
--- a/cmake/nsis/CMakeLists.txt
+++ b/cmake/nsis/CMakeLists.txt
@@ -35,7 +35,11 @@ SET(CPACK_NSIS_EXTRA_UNINSTALL_COMMANDS "
   " PARENT_SCOPE)
 
 IF(WIN64)
-	SET(CPACK_PACKAGE_FILE_NAME      "${CMAKE_PROJECT_NAME}-${VERSION}-${WIN_PLATFORM}-win64")
+	if(IS_ARM64)
+		set(CPACK_PACKAGE_FILE_NAME      "${CMAKE_PROJECT_NAME}-${VERSION}-${WIN_PLATFORM}-arm64")
+	else()
+		set(CPACK_PACKAGE_FILE_NAME      "${CMAKE_PROJECT_NAME}-${VERSION}-${WIN_PLATFORM}-win64")
+	endif()
 	SET(CPACK_INSTALL_FIX "$PROGRAMFILES64\\\\${CPACK_PACKAGE_INSTALL_DIRECTORY}\\\\")
 	SET(CPACK_NSIS_DEFINES "
 		${CPACK_NSIS_DEFINES}