sysroot: add a set of base system files

cmake/Sysroot.cmake

@@ -9,6 +9,34 @@ function(sysroot_reset)
 		COMMAND_ERROR_IS_FATAL ANY)
 endfunction(sysroot_reset)
 
+function(sysroot_set_base)
+	set(options)
+	set(one_value_args PATH)
+	set(multi_value_args)
+
+	cmake_parse_arguments(PARSE_ARGV 0 arg
+		"${options}"
+		"${one_value_args}"
+		"${multi_value_args}")
+
+	set(sysroot_target_name _sysroot-base)
+
+	get_property(sysroot_targets GLOBAL PROPERTY sysroot_target_list)
+	list(LENGTH sysroot_targets nr_sysroot_targets)
+	if (${nr_sysroot_targets} GREATER 0)
+		math(EXPR serialiser_index "${nr_sysroot_targets}-1")
+		list(GET sysroot_targets ${serialiser_index} serialiser)
+	endif ()
+
+	add_custom_target(${sysroot_target_name}
+		COMMAND	${Python_EXECUTABLE} ${sysroot_tool}
+			set-base ${sysroot_manifest} ${arg_PATH}
+		COMMENT "Preparing sysroot base"
+		DEPENDS ${serialiser})
+
+	set_property(GLOBAL PROPERTY sysroot_target_list ${sysroot_targets} ${sysroot_target_name})
+endfunction(sysroot_set_base)
+
 function(sysroot_add_library)
 	set(options)
 	set(one_value_args NAME HEADER_DIR LIB_DIR)
@@ -93,7 +121,6 @@ function(sysroot_add_object_library)
 	endif ()
 
 	get_property(tmp TARGET ${target_name} PROPERTY SUFFIX)
-	message(STATUS ${tmp})
 
 	set_property(GLOBAL PROPERTY sysroot_target_list ${sysroot_targets} ${sysroot_target_name})
 endfunction(sysroot_add_object_library)