gnu-ghostscript-8.55: segment faults in 64-bit worlds

[Nelson H. F. Beebe]

I've completed build attempts of gnu-ghostscript-8.55 on about 25
flavors of Unix.  Only builds on GNU/Linux systems succeeded; problem
reports about other platforms will follow over the next few days.

On two quite-different 64-bit systems, GNU/Linux on Alpha and on
IA-64, I get identical failures at run time when gs is built with gcc:

        % cd lib
        % gdb ../bin/gs
        GNU gdb 6.3
        ...
        (gdb) run ../examples/tiger.eps
        Starting program: /local/build/gcc4/gnu-ghostscript-8.55/bin/gs 
../examples/tiger.eps
        (no debugging symbols found)
        (no debugging symbols found)
        (no debugging symbols found)
        (no debugging symbols found)
        (no debugging symbols found)
        GNU Ghostscript 8.55 (2006-10-17)
        Copyright (C) 2006 artofcode LLC, Benicia, CA.  All rights reserved.
        This software comes with NO WARRANTY: see the file PUBLIC for details.

        Program received signal SIGSEGV, Segmentation fault.
        0x4000000000143d61 in refs_compact ()
        (gdb) where
        #0  0x4000000000143d61 in refs_compact ()
        #1  0x40000000001428a0 in gs_gc_reclaim ()
        #2  0x40000000002377a0 in context_reclaim ()
        #3  0x40000000000edef0 in ireclaim ()
        #4  0x40000000000e50c0 in interp_reclaim ()
        #5  0x40000000000e71d0 in gs_interpret ()
        #6  0x40000000000d0830 in gs_main_interpret ()
        #7  0x40000000000d2be0 in gs_main_init2 ()
        #8  0x40000000000d4060 in runarg ()
        #9  0x40000000000d4670 in argproc ()
        #10 0x40000000000d7fe0 in gs_main_init_with_args ()
        #11 0x4000000000006f20 in main ()

This also occurs on IA-64 when I change the compiler from gcc 3.4.6 to
4.1.0, and when I build with opencc (PathScale EKOPath(TM) Compiler
Suite: Version 1.0).

For the record, I did the first IA-64 build with this environment:

Machinetype:            Dell PowerEdge 3250: Intel Itanium-2 (1400 MHz) (2 
CPUs, 4GB RAM);
                        GNU/Linux 2.6.9-22.0.2.EL (Red Hat Enterprise Linux AS 
release 4 (Nahant Update 3))
Remote cc version:      cc (GCC) 3.4.6 20060404 (Red Hat 3.4.6-3)
Configure environment:  CC=/usr/bin/cc CXX=/usr/bin/c++ 
LDFLAGS="-Wl,-rpath,/usr/local/lib" FC=g77 F77=g77

-------------------------------------------------------------------------------
- Nelson H. F. Beebe                    Tel: +1 801 581 5254                  -
- University of Utah                    FAX: +1 801 581 4148                  -
- Department of Mathematics, 110 LCB    Internet e-mail: address@hidden  -
- 155 S 1400 E RM 233                       address@hidden  address@hidden -
- Salt Lake City, UT 84112-0090, USA    URL: http://www.math.utah.edu/~beebe/ -
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