Re: egcs sig 11 error

[Jon Barnett <jbarnett at mpx dot com dot au>]

At 13:45 12/09/98 -0600, Jeffrey A Law wrote:
>  > The following is the output of the debug session:
>  > 
>  > Program received signal SIGSEGV, Segmentation fault.
>  > 0x8126f8a in reload (first=0x81c92e4, global=1, dumpfile=0x0)
>  >     at ../../gcc/reload1.c:1340
>  > 1340                          in_max = MAX (in_max,
>  > insn_needs.in_addr[j].groups[i]);
>  > 6: &insn_needs.in_addr[j].groups[i] = (int *) 0xbfffd614
>  > 5: insn_needs.in_addr[j].groups[i] = 0
>  > 4: in_max = 0
>  > 3: reload_n_operands = 1
>  > 2: j = 0
>  > 1: i = 0
>  > (gdb) bt
>  > #0  0x8126f8a in reload (first=0x81c92e4, global=1, dumpfile=0x0)
>  >     at ../../gcc/reload1.c:1340
>  > #1  0x8119849 in global_alloc (file=0x0) at ../../gcc/global.c:587
>  > #2  0x80669b9 in rest_of_compilation (decl=0x81ef268)
>  >     at ../../gcc/toplev.c:3723
>  > #3  0x805748e in finish_function (nested=0) at ../../gcc/c-decl.c:7182
>  > #4  0x8049897 in yyparse () at c-parse.y:349
>  > #5  0x8065522 in compile_file (name=0xbffffc96 "crtstuff.i")
>  >     at ../../gcc/toplev.c:2768
>  > #6  0x80680f3 in main (argc=7, argv=0xbffffb10, envp=0xbffffb30)
>  >     at ../../gcc/toplev.c:4838
>  > #7  0x804908e in _start ()
>  > 
>  > 
>  > I had expected an out-of-bounds condition but from the debug, everything
>  > seems ok.  I will try to roll back to an egcs-1.0.2 build and see what
>  > happens when I build egcs-1.1a with that.
>Quite odd.  Is the first stage being built with optimization?  If so
>the segfault could actually be for one of the other nearby accesses.

Sorry for the delayed reply.  Unfortunately I had to attend a client site
at rather short notice and so wasn't able to get back to this particular
problem until the weekend.

In answer to your question, I don't set any special optimizations and
pretty much let "configure" set things up - the only concession being a
'--prefix=/usr' option.

I tried recompiling the egcs-1.1a installation using a 'make clean; make
bootstrap' but the same error came up.

Funnily enough, I installed the egcs-1.1b source and compiled that and it
went fine.  I then deleted the egcs-1.1a source and unpacked it again,
going through the configure and then the 'make bootstrap'.  This also
compiled ok ...

Finally, I did a 'make clean; make bootstrap' on the successful egcs-1.1b
source installation.  This compile broke at the same place as the original
faulty egcs-1.1a compile.  Removing the source installation for egcs-1.1b
and re-installing a clean source allowed a trouble-free rebuild to take place.

Now I'm really confused about what is taking place.  Anyway, I will now
install the new egcs build, as the tests came up with a thumbs-up.

I'm still wondering why it won't rebuild after a 'make clean'.

Anyway, thanks for the effort.

Best regards,

Jon Barnett