Installing Qwt 5.2.2 on Red Hat 9 + Qt 3.1

[amitahire]

You know what? I get the same error with Qwt 5.0.0

Why isn't the QPaintBuffer class compling? Anyway help me with it. I am using Qwt 0.4.1 now, I thought maybe I will upgrade the thinga I can. (Using Qt 3-1 and Red Hat 9 - Cant change)

[amitahire]

Ok finally managed to compile qwt 5.0.1 (have to test) but tell me one thing, its not possible to compile plugin in Qt 3.1?

Where are these header files???

#include <QtPlugin>
#include <QDesignerFormEditorInterface>
#include <QDesignerFormWindowInterface>
#include <QDesignerFormWindowCursorInterface>
#include <QExtensionManager>
#include <QErrorMessage>

#include <QtPlugin>
#include <QDesignerFormEditorInterface>
#include <QDesignerFormWindowInterface>
#include <QDesignerFormWindowCursorInterface>
#include <QExtensionManager>
#include <QErrorMessage>

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So I am guessing that Qwt plugin for Qt 3.1 is not available??