override arch for cross compiled packages

Author: zeyus

cmake/LSLCMake.cmake

@@ -318,6 +318,20 @@ macro(LSLGenerateCPackConfig)
 			endif()
 			set(CPACK_DEBIAN_PACKAGE_GENERATE_SHLIBS ON)
 
+			# determine architecture for cross-compiled packages
+			if(CMAKE_CROSSCOMPILING)
+				if(CMAKE_SYSTEM_PROCESSOR MATCHES "^(aarch64|arm64)")
+					set(CPACK_DEBIAN_PACKAGE_ARCHITECTURE "arm64")
+				elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(armv7|arm)")
+					set(CPACK_DEBIAN_PACKAGE_ARCHITECTURE "armhf")
+				elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(x86_64|amd64)")
+					set(CPACK_DEBIAN_PACKAGE_ARCHITECTURE "amd64")
+				elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(i.86|x86)")
+					set(CPACK_DEBIAN_PACKAGE_ARCHITECTURE "i386")
+				endif()
+				message(STATUS "Cross-compiling: Setting Debian package architecture to ${CPACK_DEBIAN_PACKAGE_ARCHITECTURE} (CMAKE_SYSTEM_PROCESSOR=${CMAKE_SYSTEM_PROCESSOR})")
+			endif()
+
 			# include distribution name (e.g. trusty or xenial) in the file name
 			find_program(LSB_RELEASE lsb_release)
 			execute_process(COMMAND ${LSB_RELEASE} -cs