Save the following as foo.c and compile it with "gcc -g foo.c -L/usr/X11R6/lib
-lXaw -lXt":

-----cut here-----
#include <X11/Intrinsic.h>
#include <X11/Shell.h>
#include <X11/StringDefs.h>
#include <X11/Xaw/AsciiText.h>

XtAppContext context;
Widget top;
Widget text;

main(int argc, char *argv[])
{
  top = XtVaOpenApplication(&context, "Test", NULL, 0, &argc, argv,
			    NULL, sessionShellWidgetClass,
			    XtNgeometry, "=500x500",
			    0);
  text = XtVaCreateManagedWidget("text", asciiTextWidgetClass, top,
				 XtNgeometry, "=500x500",
				 XtNstring, "/etc/termcap",
				 XtNtype, XawAsciiFile,
				 NULL);
  XtRealizeWidget(top);
  XtAppMainLoop(context);
}
-----cut here-----

Now run it with glibc-2.2.90-6.i686.rpm installed.  You will see an empty window
when what you *should* see is a window displaying /etc/termcap.

Now run the same program (you don't even need to recompile it) with
glibc-2.2.4-19.3.i686.rpm installed.  It will run properly, i.e., you'll see
/etc/termcap in the window.

Obviously, this trivial program is not the one I care about :-); it's just a
test case to illustrate a problem I discovered with a much more useful program,
xrn.

In short, glibc-2.2.90-6 is broken.