2.99.2 xdvik does not detect multiple definition handling on IRIX

On Irix, using the native CC, xdvik tests for ld supporing
--allow-multiple-definition option. If this fails, it attempts to see if 
the native library does this automatically...

There are three problems...

a) There is a a fault in the code for this test
b) The BUGS file which is cited - does not exist explaining the problem.
c) xdvi.h defines XDVI_XT_XDVI_XT_TIMER_HACK instead of XDVI_XT_TIMER_HACK...
   and is not used then... Looks like a typo error.


The fault in (a) - which is not fixed in the cvs version is the following:

AC_TRY_LINK([
    #include <X11/Intrinsic.h>
    ],[
    XtIntervalId
    XtAppAddTimeOut(XtAppContext app,
				     unsigned long interval,
					          XtTimerCallbackProc proc,
						              XtPointer closure)
    {
        (void)app; (void)interval; (void)proc; (void)closure;
        return (XtIntervalId)0;
    }
    ],
    xdvi_linker_multiple_defns=yes, xdvi_linker_multiple_defns=no
    )



This creates a test program that looks something like

#include "confdefs.h"
#include <X11/Intrinsic.h>

main{
    XtIntervalId XtAppAddTimeOut(....)
    {....}
}

i.e. the definition of the function is in the function main!  This is
clealy not what is desired!!!

Here is the fix to aclocal.m4 in the texk/xdvik directory...
We create an empty main() - and declare the test function in the
include headers section.


*** aclocal.m4	2004/11/08 11:31:13	1.1
--- aclocal.m4	2004/11/08 11:31:52
***************
*** 88,94 ****
  
      AC_TRY_LINK([
      #include <X11/Intrinsic.h>
-     ],[
      XtIntervalId
      XtAppAddTimeOut(XtAppContext app,
  		    unsigned long interval,
--- 88,93 ----
***************
*** 98,103 ****
--- 97,103 ----
          (void)app; (void)interval; (void)proc; (void)closure;
          return (XtIntervalId)0;
      }
+     ],[
      ],
      xdvi_linker_multiple_defns=yes, xdvi_linker_multiple_defns=no
      )


For (c) the patch is:

*** xdvi.h	2004/11/08 11:51:09	1.1
--- xdvi.h	2004/11/08 11:51:26
***************
*** 992,1000 ****
   * See the comment in events.c for further explanations.
   */
  #if LD_ALLOWS_MULTIPLE_DEFINITIONS
! # define XDVI_XT_XDVI_XT_TIMER_HACK 1
  #else
! # define XDVI_XT_XDVI_XT_TIMER_HACK 0
  #endif
  
  /* globally used GUI stuff */
--- 992,1000 ----
   * See the comment in events.c for further explanations.
   */
  #if LD_ALLOWS_MULTIPLE_DEFINITIONS
! # define XDVI_XT_TIMER_HACK 1
  #else
! # define XDVI_XT_TIMER_HACK 0
  #endif
  
  /* globally used GUI stuff */