Name: mf23781 Date: 04/29/98


DEV: c89 under OpenEdition rejects event handler syntax

In 114, src/unix/sun/awt_Frame.c contains an event handler defined with four
parameters thus:

  static void
  Frame_event_handler(Widget w, XtPointer data, XEvent *event, Boolean *cont)

This is in good accordance with the spec for XtEventHandler in the X Toolkit
documentation. In 116 there are instead two event handlers each defined
with three parameters:

  static void
  innerCanvasEH(Widget canvasW, caddr_t client_data, XEvent *event)

  static void
  shellEH(Widget w, XtPointer data, XEvent *event)

In addition the type of the client_data parameter in the first of these is
caddr_t whereas it should be XtPointer.

On AIX these deviations are tolerated by the compiler. On OS/390 however the
c89 compiler blows up:

  ERROR CBC3280 ./../../../../src/unix/sun/awt_Frame.c:891 Function argument
  assignment between types "void(*)(struct _WidgetRec*,void*,union _XEvent*,
  int*)" and "void(*)(struct _WidgetRec*,void*,union _XEvent*)" is not allowed.

We have found it necessary to go ahead and do the workaround of ifdeffing
the function definitions in another defect.



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