bootstrap failure on HEAD

[Dave Korn]

On 12 November 2006 16:50, H. J. Lu wrote:

> On Sun, Nov 12, 2006 at 02:44:36PM -0000, Dave Korn wrote:

>> Comparing stages 2 and 3
>> warning: ./cc1-checksum.o differs
>> warning: ./cc1plus-checksum.o differs
>> warning: ./cc1obj-checksum.o differs
>> Bootstrap comparison failure!
>> ./cfg.o differs
>> ./cfgloopanal.o differs
>> ./loop-iv.o differs
>> ./predict.o differs
>> ./profile.o differs
>> ./value-prof.o differs
>> ./ipa-inline.o differs
>> make[2]: *** [compare] Error 1

> Gcc mainline may miscompile gcc when -O2 is used. See
> 
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29680
> 
> I have no problems on x86, x86-64 and ia64 with revision 118723 today
> after reverting revision 117986. Can you try
> 
> http://gcc.gnu.org/bugzilla/attachment.cgi?id=12574

    Hi H.J.,

  I updated to the revision you said, tried a clean bootstrap and verified the
bug was still present, then applied your patch, and continued the bootstrap.
I still get the same problem, so I have to conclude that Dorit is most likely
correct to suggest the host compiler is at fault: I have been using 3.2

Reading specs from /usr/lib/gcc-lib/i386-redhat-linux/3.2/specs
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man
--infodir=/usr/share/info --enable-shared --enable-threads=posix
--disable-checking --host=i386-redhat-linux --with-system-zlib
--enable-__cxa_atexit
Thread model: posix
gcc version 3.2 20020903 (Red Hat Linux 8.0 3.2-7)


  Since 3.x is dead, I'm not going to investigate, I'll just try using an
intermediate 4.1 to get going.  Thanks for the suggestion.

    cheers,
      DaveK
-- 
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