Conference noted::motif

5951.0. "Segmentation fault in XtDestroyWidget under DUNIX 4.0b" by RDGENG::READINGS_R (Richard Readings) Thu Apr 10 1997 08:00

The following code example, together with the customer's own Motif library
(libXm.so), works fine with DUNIX 3.2c but suffers a segmentation fault when it
calls XtDestroyWidget under DUNIX 4.0b. 

The segmentation fault only occurs with the environment variable
"WINTIF_COMPATIBILITYMODE" set to "Windows95", which modifies the behaviour of
the customer's libXm.so. The library is available via anonymous ftp from
apc013.reo.dec.com:/pub/libXm.so.

The example runs OK under DUNIX 4.0x with the DUNIX 3.2c libXt.so however. Can
the customer (ISV) ship this with his Motif library?

Richard

------------------------------ code example -------------------------------

#include <stdio.h>
#include <math.h>
#include <Xm/Xm.h>

main (argc, argv)
int argc;
char **argv;
{
    XtAppContext context;
    Widget shell, container, draw, scale1, scale2;
    Display *display;
    int i;
    Visual *visual;
    Colormap cmap;
    unsigned int depth;

    XtToolkitInitialize ();
    context = XtCreateApplicationContext ();
    display = XtOpenDisplay (context, NULL, NULL, "Scale",
                             NULL, NULL,
                             &argc, argv);

    /* Create a temporary shell so application resources can be fetched from the
       resource database */
    shell = XtVaAppCreateShell (NULL, "ColourWheel",
                                applicationShellWidgetClass,
                                display, NULL);
    
    /* Now the depth, visual and colormap is known, destory the old, temporary
       shell and create a new one */
    XtDestroyWidget (shell);
}