java/6092: sparc-sun-solaris2.7 has hundreds of libjava failures with -m64

[Kaveh R. Ghazi]

The following reply was made to PR java/6092; it has been noted by GNATS.

From: "Kaveh R. Ghazi" <ghazi@caip.rutgers.edu>
To: tromey@redhat.com
Cc: gcc-gnats@gcc.gnu.org
Subject: Re: java/6092: sparc-sun-solaris2.7 has hundreds of libjava failures with -m64
Date: Sun, 31 Mar 2002 00:25:12 -0500 (EST)

  > From: Tom Tromey <tromey@redhat.com>
  > 
  > Kaveh> That seems ok.  So I ran it and got:
  > Kaveh> 	Abort (core dumped)
  > 
  > Ok.  Often symptoms like this will mean some pretty low-level problem,
  > like binutils failure or some basic problem with the port.
 
 I think you may be right about the low-level problem.  (But note, I'm
 using native as/ld, not binutils.)  Also, some of the cases weren't
 crashing but having output diffs with the expected results, so there
 may be more than one problem here.
 
  > Kaveh> If you'd like me to attempt anything else let me know.
  > Kaveh> Alternatively, you could get a solaris2 box and run make check
  > Kaveh> with: setenv RUNTESTFLAGS "--verbose
  > Kaveh> --target_board='unix{-m64,}'" to get both regular and -m64
  > Kaveh> passes.
  > 
  > I finally read about -m64 in the manual.  It sets the pointer size to
  > 64 bits.  I think you would have to build the entire runtime with -m64
  > for this to even have a chance of working.
  > 
  > For instance, "hello world" with gcj needs a virtual method call.  If
  > the hello program and the runtime disagree on pointer size, this is
  > going to fail.
  > 
  > Is there some mitigating factor I'm unaware of?  I'm inclined to say
  > that this isn't really a bug, and that you must make a -m64 multilib
  > if you want that to work.
  > Tom
 
 No I think it's really a bug.  If you look back, I specifically showed
 the `ldd' results to prove I was using the correct shared libs for
 64-bit compilation.  (The sparcv9 multilibs *are* built with -m64.)
 
 		--Kaveh
 --
 Kaveh R. Ghazi			Director of Systems Architecture
 ghazi@caip.rutgers.edu		Qwest Global Services