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N°8796 - Add PHP code style validation in iTop and extensions - format whole code base

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This commit is contained in:
odain
2025-11-07 15:39:53 +01:00
parent 12f23113f5
commit 890a2568c8
2110 changed files with 53099 additions and 63885 deletions
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430
core/kpi.class.inc.php
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@@ -1,4 +1,5 @@
<?php
/**
* @copyright Copyright (C) 2010-2024 Combodo SAS
* @license http://opensource.org/licenses/AGPL-3.0
@@ -7,32 +8,31 @@
use Combodo\iTop\Core\Kpi\KpiLogData;
use Combodo\iTop\Service\Module\ModuleService;
/**
* Measures operations duration, memory usage, etc. (and some other KPIs)
*/
class ExecutionKPI
{
static protected $m_bEnabled_Duration = false;
static protected $m_bEnabled_Memory = false;
static protected $m_bBlameCaller = false;
static protected $m_sAllowedUser = '*';
static protected $m_bGenerateLegacyReport = true;
static protected $m_fSlowQueries = 0;
protected static $m_bEnabled_Duration = false;
protected static $m_bEnabled_Memory = false;
protected static $m_bBlameCaller = false;
protected static $m_sAllowedUser = '*';
protected static $m_bGenerateLegacyReport = true;
protected static $m_fSlowQueries = 0;
static protected $m_aStats = []; // Recurrent operations
static protected $m_aExecData = []; // One shot operations
protected static $m_aStats = []; // Recurrent operations
protected static $m_aExecData = []; // One shot operations
/**
* @var array[ExecutionKPI]
*/
static protected $m_aExecutionStack = []; // embedded execution stats
protected static $m_aExecutionStack = []; // embedded execution stats
protected $m_fStarted = null;
protected $m_fChildrenDuration = 0; // Count embedded
protected $m_iInitialMemory = null;
static public function EnableDuration($iLevel)
public static function EnableDuration($iLevel)
{
if ($iLevel > 0) {
self::$m_bEnabled_Duration = true;
@@ -47,7 +47,7 @@ class ExecutionKPI
}
}
static public function EnableMemory($iLevel)
public static function EnableMemory($iLevel)
{
if ($iLevel > 0) {
self::$m_bEnabled_Memory = true;
@@ -57,91 +57,94 @@ class ExecutionKPI
}
/**
* @param string sUser A user login or * for all users
*/
static public function SetAllowedUser($sUser)
* @param string sUser A user login or * for all users
*/
public static function SetAllowedUser($sUser)
{
self::$m_sAllowedUser = $sUser;
}
static public function IsEnabled()
public static function IsEnabled()
{
if (self::$m_bEnabled_Duration || self::$m_bEnabled_Memory)
{
if ((self::$m_sAllowedUser == '*') || (UserRights::GetUser() == trim(self::$m_sAllowedUser)))
{
if (self::$m_bEnabled_Duration || self::$m_bEnabled_Memory) {
if ((self::$m_sAllowedUser == '*') || (UserRights::GetUser() == trim(self::$m_sAllowedUser))) {
return true;
}
}
return false;
}
static public function SetGenerateLegacyReport($bReportExtensionsOnly)
{
self::$m_bGenerateLegacyReport = $bReportExtensionsOnly;
}
static public function SetSlowQueries($fSlowQueries)
{
self::$m_fSlowQueries = $fSlowQueries;
}
static public function GetDescription()
public static function SetGenerateLegacyReport($bReportExtensionsOnly)
{
$aFeatures = array();
if (self::$m_bEnabled_Duration) $aFeatures[] = 'Duration';
if (self::$m_bEnabled_Memory) $aFeatures[] = 'Memory usage';
$sFeatures = 'Measures: '.implode(', ', $aFeatures);
$sFor = self::$m_sAllowedUser == '*' ? 'EVERYBODY' : "'".trim(self::$m_sAllowedUser)."'";
$sSlowQueries = '';
if (self::$m_fSlowQueries > 0) {
$sSlowQueries = ". Slow Queries: ".self::$m_fSlowQueries."s";
}
$aExtensions = [];
/** @var \iKPILoggerExtension $oExtensionInstance */
foreach (MetaModel::EnumPlugins('iKPILoggerExtension') as $oExtensionInstance) {
$aExtensions[] = ModuleService::GetInstance()->GetModuleNameFromObject($oExtensionInstance);
}
$sExtensions = '';
if (count($aExtensions) > 0) {
$sExtensions = '. KPI Extensions: ['.implode(', ', $aExtensions).']';
}
return "KPI logging is active for $sFor. $sFeatures$sSlowQueries$sExtensions";
self::$m_bGenerateLegacyReport = $bReportExtensionsOnly;
}
static public function ReportStats()
public static function SetSlowQueries($fSlowQueries)
{
if (!self::IsEnabled()) return;
self::$m_fSlowQueries = $fSlowQueries;
}
public static function GetDescription()
{
$aFeatures = [];
if (self::$m_bEnabled_Duration) {
$aFeatures[] = 'Duration';
}
if (self::$m_bEnabled_Memory) {
$aFeatures[] = 'Memory usage';
}
$sFeatures = 'Measures: '.implode(', ', $aFeatures);
$sFor = self::$m_sAllowedUser == '*' ? 'EVERYBODY' : "'".trim(self::$m_sAllowedUser)."'";
$sSlowQueries = '';
if (self::$m_fSlowQueries > 0) {
$sSlowQueries = ". Slow Queries: ".self::$m_fSlowQueries."s";
}
$aExtensions = [];
/** @var \iKPILoggerExtension $oExtensionInstance */
foreach (MetaModel::EnumPlugins('iKPILoggerExtension') as $oExtensionInstance) {
$aExtensions[] = ModuleService::GetInstance()->GetModuleNameFromObject($oExtensionInstance);
}
$sExtensions = '';
if (count($aExtensions) > 0) {
$sExtensions = '. KPI Extensions: ['.implode(', ', $aExtensions).']';
}
return "KPI logging is active for $sFor. $sFeatures$sSlowQueries$sExtensions";
}
public static function ReportStats()
{
if (!self::IsEnabled()) {
return;
}
global $fItopStarted;
global $iItopInitialMemory;
global $iItopInitialMemory;
$sExecId = microtime(); // id to differentiate the hrefs!
$sRequest = $_SERVER['REQUEST_URI'].' ('.$_SERVER['REQUEST_METHOD'].')';
if (isset($_POST['operation'])) {
$sRequest .= ' operation: '.$_POST['operation'];
}
$sRequest = $_SERVER['REQUEST_URI'].' ('.$_SERVER['REQUEST_METHOD'].')';
if (isset($_POST['operation'])) {
$sRequest .= ' operation: '.$_POST['operation'];
}
$fStop = MyHelpers::getmicrotime();
if (($fStop - $fItopStarted) > self::$m_fSlowQueries) {
// Invoke extensions to log the KPI operation
/** @var \iKPILoggerExtension $oExtensionInstance */
$iCurrentMemory = self::memory_get_usage();
$iPeakMemory = self::memory_get_peak_usage();
foreach (MetaModel::EnumPlugins('iKPILoggerExtension') as $oExtensionInstance) {
$oKPILogData = new KpiLogData(KpiLogData::TYPE_REQUEST, 'Page', $sRequest, $fItopStarted, $fStop, '', $iItopInitialMemory, $iCurrentMemory, $iPeakMemory);
$oExtensionInstance->LogOperation($oKPILogData);
}
}
$fStop = MyHelpers::getmicrotime();
if (($fStop - $fItopStarted) > self::$m_fSlowQueries) {
// Invoke extensions to log the KPI operation
/** @var \iKPILoggerExtension $oExtensionInstance */
$iCurrentMemory = self::memory_get_usage();
$iPeakMemory = self::memory_get_peak_usage();
foreach (MetaModel::EnumPlugins('iKPILoggerExtension') as $oExtensionInstance) {
$oKPILogData = new KpiLogData(KpiLogData::TYPE_REQUEST, 'Page', $sRequest, $fItopStarted, $fStop, '', $iItopInitialMemory, $iCurrentMemory, $iPeakMemory);
$oExtensionInstance->LogOperation($oKPILogData);
}
}
if (!self::$m_bGenerateLegacyReport) {
return;
}
if (!self::$m_bGenerateLegacyReport) {
return;
}
$aBeginTimes = array();
foreach (self::$m_aExecData as $aOpStats)
{
$aBeginTimes = [];
foreach (self::$m_aExecData as $aOpStats) {
$aBeginTimes[] = $aOpStats['time_begin'];
}
array_multisort($aBeginTimes, self::$m_aExecData);
@@ -150,7 +153,7 @@ class ExecutionKPI
$sHtml = "<hr/>";
$sHtml .= "<div style=\"background-color: grey; padding: 10px;\">";
$sHtml .= "<h3><a name=\"".md5($sExecId)."\">KPIs</a> - $sRequest</h3>";
$sHtml .= "<h3><a name=\"".md5($sExecId)."\">KPIs</a> - $sRequest</h3>";
$oStarted = DateTime::createFromFormat('U.u', $fItopStarted);
$sHtml .= '<p>'.$oStarted->format('Y-m-d H:i:s.u').'</p>';
$sHtml .= "<p>log_kpi_user_id: ".UserRights::GetUserId()."</p>";
@@ -159,8 +162,7 @@ class ExecutionKPI
$sHtml .= "<thead>";
$sHtml .= " <th>Operation</th><th>Begin</th><th>End</th><th>Duration</th><th>Memory start</th><th>Memory end</th><th>Memory peak</th>";
$sHtml .= "</thead>";
foreach (self::$m_aExecData as $aOpStats)
{
foreach (self::$m_aExecData as $aOpStats) {
$sOperation = $aOpStats['op'];
$sBegin = round($aOpStats['time_begin'], 3);
$sEnd = round($aOpStats['time_end'], 3);
@@ -170,12 +172,10 @@ class ExecutionKPI
$sMemBegin = 'n/a';
$sMemEnd = 'n/a';
$sMemPeak = 'n/a';
if (isset($aOpStats['mem_begin']))
{
if (isset($aOpStats['mem_begin'])) {
$sMemBegin = self::MemStr($aOpStats['mem_begin']);
$sMemEnd = self::MemStr($aOpStats['mem_end']);
if (isset($aOpStats['mem_peak']))
{
if (isset($aOpStats['mem_peak'])) {
$sMemPeak = self::MemStr($aOpStats['mem_peak']);
}
}
@@ -187,38 +187,34 @@ class ExecutionKPI
$sHtml .= "</table>";
$sHtml .= "</div>";
$aConsolidatedStats = array();
foreach (self::$m_aStats as $sOperation => $aOpStats)
{
$aConsolidatedStats = [];
foreach (self::$m_aStats as $sOperation => $aOpStats) {
$fTotalOp = 0;
$iTotalOp = 0;
$fMinOp = null;
$fMaxOp = 0;
$sMaxOpArguments = null;
foreach ($aOpStats as $sArguments => $aEvents)
{
foreach ($aEvents as $aEventData)
{
foreach ($aOpStats as $sArguments => $aEvents) {
foreach ($aEvents as $aEventData) {
$fDuration = $aEventData['time'];
$fTotalOp += $fDuration;
$iTotalOp++;
$fMinOp = is_null($fMinOp) ? $fDuration : min($fMinOp, $fDuration);
if ($fDuration > $fMaxOp)
{
if ($fDuration > $fMaxOp) {
$sMaxOpArguments = $sArguments;
$fMaxOp = $fDuration;
}
}
}
$aConsolidatedStats[$sOperation] = array(
$aConsolidatedStats[$sOperation] = [
'count' => $iTotalOp,
'duration' => $fTotalOp,
'min' => $fMinOp,
'max' => $fMaxOp,
'avg' => $fTotalOp / $iTotalOp,
'max_args' => $sMaxOpArguments
);
'max_args' => $sMaxOpArguments,
];
}
$sHtml .= "<div>";
@@ -226,8 +222,7 @@ class ExecutionKPI
$sHtml .= "<thead>";
$sHtml .= " <th>Operation</th><th>Count</th><th>Duration</th><th>Min</th><th>Max</th><th>Avg</th>";
$sHtml .= "</thead>";
foreach ($aConsolidatedStats as $sOperation => $aOpStats)
{
foreach ($aConsolidatedStats as $sOperation => $aOpStats) {
$sOperation = '<a href="#'.md5($sExecId.$sOperation).'">'.$sOperation.'</a>';
$sCount = $aOpStats['count'];
$sDuration = round($aOpStats['duration'], 3);
@@ -250,25 +245,20 @@ class ExecutionKPI
self::Report($sHtml);
// Report operation details
foreach (self::$m_aStats as $sOperation => $aOpStats)
{
foreach (self::$m_aStats as $sOperation => $aOpStats) {
$sHtml = '';
$bDisplayHeader = true;
foreach ($aOpStats as $sArguments => $aEvents)
{
foreach ($aOpStats as $sArguments => $aEvents) {
$sHtmlArguments = '<a name="'.md5($sExecId.$sArguments).'"><div style="white-space: pre-wrap;">'.$sArguments.'</div></a>';
if ($aConsolidatedStats[$sOperation]['max_args'] == $sArguments)
{
if ($aConsolidatedStats[$sOperation]['max_args'] == $sArguments) {
$sHtmlArguments = '<span style="color: red;">'.$sHtmlArguments.'</span>';
}
if (isset($aEvents[0]['callers']))
{
if (isset($aEvents[0]['callers'])) {
$sHtmlArguments .= '<div style="padding: 10px;">';
$sHtmlArguments .= '<table border="1" bgcolor="#cfc">';
$sHtmlArguments .= '<tr><td colspan="2" bgcolor="#e9b96">Call stack for the <b>FIRST</b> caller</td></tr>';
foreach ($aEvents[0]['callers'] as $aCall)
{
foreach ($aEvents[0]['callers'] as $aCall) {
$sHtmlArguments .= '<tr>';
$sHtmlArguments .= '<td>'.$aCall['Function'].'</td>';
$sHtmlArguments .= '<td>'.$aCall['File'].':'.$aCall['Line'].'</td>';
@@ -281,8 +271,7 @@ class ExecutionKPI
$fTotalInter = 0;
$fMinInter = null;
$fMaxInter = 0;
foreach ($aEvents as $aEventData)
{
foreach ($aEvents as $aEventData) {
$fDuration = $aEventData['time'];
$fTotalInter += $fDuration;
$fMinInter = is_null($fMinInter) ? $fDuration : min($fMinInter, $fDuration);
@@ -293,10 +282,8 @@ class ExecutionKPI
$sTotalInter = round($fTotalInter, 3);
$sMinInter = round($fMinInter, 3);
$sMaxInter = round($fMaxInter, 3);
if (($fTotalInter >= self::$m_fSlowQueries))
{
if ($bDisplayHeader)
{
if (($fTotalInter >= self::$m_fSlowQueries)) {
if ($bDisplayHeader) {
$sOperationHtml = '<a name="'.md5($sExecId.$sOperation).'">'.$sOperation.'</a>';
$sHtml .= "<h4>$sOperationHtml</h4>";
$sHtml .= "<table border=\"1\" style=\"$sTableStyle\">";
@@ -310,8 +297,7 @@ class ExecutionKPI
$sHtml .= "</tr>";
}
}
if (!$bDisplayHeader)
{
if (!$bDisplayHeader) {
$sHtml .= "</table>";
$sHtml .= "<p><a href=\"#".md5($sExecId)."\">Back to page stats</a></p>";
}
@@ -321,19 +307,19 @@ class ExecutionKPI
self::Report($sHtml);
}
public static function InitStats()
{
// Invoke extensions to initialize the KPI statistics
/** @var \iKPILoggerExtension $oExtensionInstance */
foreach (MetaModel::EnumPlugins('iKPILoggerExtension') as $oExtensionInstance) {
$oExtensionInstance->InitStats();
}
}
public static function InitStats()
{
// Invoke extensions to initialize the KPI statistics
/** @var \iKPILoggerExtension $oExtensionInstance */
foreach (MetaModel::EnumPlugins('iKPILoggerExtension') as $oExtensionInstance) {
$oExtensionInstance->InitStats();
}
}
public function __construct()
{
$this->ResetCounters();
}
}
// Get the duration since startup, and reset the counter for the next measure
//
@@ -341,65 +327,62 @@ class ExecutionKPI
{
global $fItopStarted;
if (!self::IsEnabled()) {
return;
}
if (!self::IsEnabled()) {
return;
}
$aNewEntry = null;
$fStarted = $this->m_fStarted;
$fStopped = $this->m_fStarted;
if (self::$m_bEnabled_Duration) {
$fStarted = $this->m_fStarted;
$fStopped = $this->m_fStarted;
if (self::$m_bEnabled_Duration) {
$fStopped = MyHelpers::getmicrotime();
$aNewEntry = array(
$aNewEntry = [
'op' => $sOperationDesc,
'time_begin' => $this->m_fStarted - $fItopStarted,
'time_end' => $fStopped - $fItopStarted,
);
];
// Reset for the next operation (if the object is recycled)
$this->m_fStarted = $fStopped;
}
$iInitialMemory = is_null($this->m_iInitialMemory) ? 0 : $this->m_iInitialMemory;
$iCurrentMemory = 0;
$iPeakMemory = 0;
if (self::$m_bEnabled_Memory)
{
$iInitialMemory = is_null($this->m_iInitialMemory) ? 0 : $this->m_iInitialMemory;
$iCurrentMemory = 0;
$iPeakMemory = 0;
if (self::$m_bEnabled_Memory) {
$iCurrentMemory = self::memory_get_usage();
if (is_null($aNewEntry))
{
$aNewEntry = array('op' => $sOperationDesc);
if (is_null($aNewEntry)) {
$aNewEntry = ['op' => $sOperationDesc];
}
$aNewEntry['mem_begin'] = $this->m_iInitialMemory;
$aNewEntry['mem_end'] = $iCurrentMemory;
$iPeakMemory = self::memory_get_peak_usage();
$aNewEntry['mem_peak'] = $iPeakMemory;
$iPeakMemory = self::memory_get_peak_usage();
$aNewEntry['mem_peak'] = $iPeakMemory;
// Reset for the next operation (if the object is recycled)
$this->m_iInitialMemory = $iCurrentMemory;
}
if (self::$m_bEnabled_Duration || self::$m_bEnabled_Memory) {
// Invoke extensions to log the KPI operation
/** @var \iKPILoggerExtension $oExtensionInstance */
foreach(MetaModel::EnumPlugins('iKPILoggerExtension') as $oExtensionInstance)
{
$sExtension = ModuleService::GetInstance()->GetModuleNameFromCallStack(1);
$oKPILogData = new KpiLogData(
KpiLogData::TYPE_REPORT,
'Step',
$sOperationDesc,
$fStarted,
$fStopped,
$sExtension,
$iInitialMemory,
$iCurrentMemory,
$iPeakMemory);
$oExtensionInstance->LogOperation($oKPILogData);
}
}
if (self::$m_bEnabled_Duration || self::$m_bEnabled_Memory) {
// Invoke extensions to log the KPI operation
/** @var \iKPILoggerExtension $oExtensionInstance */
foreach (MetaModel::EnumPlugins('iKPILoggerExtension') as $oExtensionInstance) {
$sExtension = ModuleService::GetInstance()->GetModuleNameFromCallStack(1);
$oKPILogData = new KpiLogData(
KpiLogData::TYPE_REPORT,
'Step',
$sOperationDesc,
$fStarted,
$fStopped,
$sExtension,
$iInitialMemory,
$iCurrentMemory,
$iPeakMemory
);
$oExtensionInstance->LogOperation($oKPILogData);
}
}
if (!is_null($aNewEntry) && self::$m_bGenerateLegacyReport)
{
if (!is_null($aNewEntry) && self::$m_bGenerateLegacyReport) {
self::$m_aExecData[] = $aNewEntry;
}
$this->ResetCounters();
@@ -417,20 +400,20 @@ class ExecutionKPI
* @throws \ReflectionException
*/
public function ComputeStatsForExtension($object, string $sMethod, string $sMessage = ''): bool
{
if (!self::IsEnabled()) {
return true;
}
{
if (!self::IsEnabled()) {
return true;
}
$sSignature = ModuleService::GetInstance()->GetModuleMethodSignature($object, $sMethod);
if (utils::StartsWith($sSignature, '[')) {
$this->ComputeStats('Extension', "$sSignature $sMessage");
$sSignature = ModuleService::GetInstance()->GetModuleMethodSignature($object, $sMethod);
if (utils::StartsWith($sSignature, '[')) {
$this->ComputeStats('Extension', "$sSignature $sMessage");
return true;
}
}
return false;
}
}
public function ComputeStats($sOperation, $sArguments)
{
@@ -442,85 +425,82 @@ class ExecutionKPI
if (self::$m_bEnabled_Duration) {
$fStopped = MyHelpers::getmicrotime();
$fDuration = $fStopped - $this->m_fStarted;
$aCallstack = [];
if (self::$m_bGenerateLegacyReport) {
if (self::$m_bBlameCaller) {
$aCallstack = MyHelpers::get_callstack(1);
self::$m_aStats[$sOperation][$sArguments][] = [
'time' => $fDuration,
'callers' => $aCallstack,
];
} else {
self::$m_aStats[$sOperation][$sArguments][] = [
'time' => $fDuration
];
}
}
$aCallstack = [];
if (self::$m_bGenerateLegacyReport) {
if (self::$m_bBlameCaller) {
$aCallstack = MyHelpers::get_callstack(1);
self::$m_aStats[$sOperation][$sArguments][] = [
'time' => $fDuration,
'callers' => $aCallstack,
];
} else {
self::$m_aStats[$sOperation][$sArguments][] = [
'time' => $fDuration,
];
}
}
$iInitialMemory = is_null($this->m_iInitialMemory) ? 0 : $this->m_iInitialMemory;
$iCurrentMemory = 0;
$iPeakMemory = 0;
if (self::$m_bEnabled_Memory)
{
$iCurrentMemory = self::memory_get_usage();
$iPeakMemory = self::memory_get_peak_usage();
}
$iInitialMemory = is_null($this->m_iInitialMemory) ? 0 : $this->m_iInitialMemory;
$iCurrentMemory = 0;
$iPeakMemory = 0;
if (self::$m_bEnabled_Memory) {
$iCurrentMemory = self::memory_get_usage();
$iPeakMemory = self::memory_get_peak_usage();
}
// Invoke extensions to log the KPI operation
/** @var \iKPILoggerExtension $oExtensionInstance */
foreach (MetaModel::EnumPlugins('iKPILoggerExtension') as $oExtensionInstance) {
//$sExtension = ModuleService::GetInstance()->GetModuleNameFromCallStack(1);
$sExtension = '';
$oKPILogData = new KpiLogData(
KpiLogData::TYPE_STATS,
$sOperation,
$sArguments,
$this->m_fStarted,
$fStopped,
$sExtension,
$iInitialMemory,
$iCurrentMemory,
$iPeakMemory,
$aCallstack);
$oExtensionInstance->LogOperation($oKPILogData);
}
}
// Invoke extensions to log the KPI operation
/** @var \iKPILoggerExtension $oExtensionInstance */
foreach (MetaModel::EnumPlugins('iKPILoggerExtension') as $oExtensionInstance) {
//$sExtension = ModuleService::GetInstance()->GetModuleNameFromCallStack(1);
$sExtension = '';
$oKPILogData = new KpiLogData(
KpiLogData::TYPE_STATS,
$sOperation,
$sArguments,
$this->m_fStarted,
$fStopped,
$sExtension,
$iInitialMemory,
$iCurrentMemory,
$iPeakMemory,
$aCallstack
);
$oExtensionInstance->LogOperation($oKPILogData);
}
}
}
protected function ResetCounters()
{
if (self::$m_bEnabled_Duration)
{
if (self::$m_bEnabled_Duration) {
$this->m_fStarted = microtime(true);
}
if (self::$m_bEnabled_Memory)
{
if (self::$m_bEnabled_Memory) {
$this->m_iInitialMemory = self::memory_get_usage();
}
}
const HTML_REPORT_FILE = 'log/kpi.html';
public const HTML_REPORT_FILE = 'log/kpi.html';
static protected function Report($sText)
protected static function Report($sText)
{
file_put_contents(APPROOT.self::HTML_REPORT_FILE, "$sText\n", FILE_APPEND | LOCK_EX);
}
static protected function MemStr($iMemory)
protected static function MemStr($iMemory)
{
return round($iMemory / 1024).' Kb';
}
static protected function memory_get_usage()
protected static function memory_get_usage()
{
return memory_get_usage(true);
return memory_get_usage(true);
}
static public function memory_get_peak_usage($bRealUsage = false)
public static function memory_get_peak_usage($bRealUsage = false)
{
if (function_exists('memory_get_peak_usage'))
{
if (function_exists('memory_get_peak_usage')) {
return memory_get_peak_usage($bRealUsage);
}
// PHP > 5.2.1 - this verb depends on a compilation option