stdio.h doesn't seem necessary. stdlib.h might be though, for exit().
#include "mainwindow.h"
#include "apitrace.h"
#include "mainwindow.h"
#include "apitrace.h"
#include <QVariant>
#include <QImage>
#include <QVariant>
#include <QImage>
Q_DECLARE_METATYPE(QList<ApiTraceFrame*>);
Q_DECLARE_METATYPE(QVector<ApiTraceCall*>);
Q_DECLARE_METATYPE(Qt::CaseSensitivity);
Q_DECLARE_METATYPE(QList<ApiTraceFrame*>);
Q_DECLARE_METATYPE(QVector<ApiTraceCall*>);
Q_DECLARE_METATYPE(Qt::CaseSensitivity);