IupLog

Writes a message to the system log.

• Windows (Win32): Application event log via ReportEvent (view with Event Viewer). DEBUG type uses OutputDebugString instead.
• Windows (WinUI): OutputDebugString for DEBUG, stdout/stderr for other types.
• Linux/Unix (GTK 3, GTK 4, Motif, EFL, FLTK): Syslog via vsyslog (e.g. /var/log/syslog). DEBUG also writes to stderr.
• macOS and iOS: Apple Unified Logging via os_log (view with Console or log).
• Qt: qt_message_output (qDebug, qInfo, qWarning, qCritical).
• Android: logcat with tag "IupLog" (view with adb logcat).
• Haiku: Syslog via vsyslog (view with the Syslog preflet or tail /var/log/syslog).

Parameters/Return

void IupLog(const char* type, const char* format, ...);
void IupLogV(const char* type, const char* format, va_list arglist);

type: type of the log. Can be DEBUG, INFO, ERROR and WARNING.
format: uses the same format specification as the sprintf function in C.