fix get_system()

CMakeLists.txt

@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.0)
+cmake_minimum_required(VERSION 3.13)
 project(cmake LANGUAGES NONE)
 file(GLOB CMAKES "*.cmake" "*.in" "*.keystore")
 if(INSTALL_DIR)

DeployMacros.cmake

@@ -377,7 +377,7 @@ macro(get_system _OS _ARCH)
 			endforeach()
 		endif()
 		find_file(_release_file NAMES os-release lsb-release PATHS ${_paths} NO_DEFAULT_PATH)
-		if (NOT "x${_release_file}" STREQUAL "x")
+		if (_release_file)
 			file(STRINGS "${_release_file}" _lines)
 			foreach(_l ${_lines})
 				if ("${_l}" MATCHES "VERSION_ID=.*")
@@ -390,9 +390,11 @@ macro(get_system _OS _ARCH)
 					#message("ID ${_os_id}")
 				endif()
 			endforeach()
-		endif()
-		string(TOLOWER "${_os_id}${_os_ver}" ${_OS})
-		if ("x${${_OS}}" STREQUAL "x")
+			string(TOLOWER "${_os_id}${_os_ver}" ${_OS})
+			if ("x${${_OS}}" STREQUAL "x")
+				set(${_OS} "linux")
+			endif()
+		else()
 			set(${_OS} "linux")
 		endif()
 		set(${_ARCH} "${MY_ARCH}")