Installs the system module.
Separated from the installation of other modules so core system functions can be made available while other modules are installed.
function drupal_install_system() {
$system_path = drupal_get_path('module', 'system');
require_once DRUPAL_ROOT . '/' . $system_path . '/system.install';
module_invoke('system', 'install');
$system_versions = drupal_get_schema_versions('system');
$system_version = $system_versions ? max($system_versions) : SCHEMA_INSTALLED;
db_insert('system')
->fields(array(
'filename',
'name',
'type',
'owner',
'status',
'schema_version',
'bootstrap',
))
->values(array(
'filename' => $system_path . '/system.module',
'name' => 'system',
'type' => 'module',
'owner' => '',
'status' => 1,
'schema_version' => $system_version,
'bootstrap' => 0,
))
->execute();
system_rebuild_module_data();
}