[Bug bootstrap/50543] New: Bootstrap fails to build for latest 4.6.0

[Bug bootstrap/50543] New: Bootstrap fails to build for latest 4.6.0

[kirill.yukhin at intel dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50543

             Bug #: 50543
           Summary: Bootstrap fails to build for latest 4.6.0
    Classification: Unclassified
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: kirill.yukhin@intel.com


Hi,
I am not sure, but possibly this will duplicate some other bug.

Bootstrap miscompares on latest 4.6.0 sources:


$ ../gcc/configure i686-linux --with-arch=corei7 --with-cpu=corei7
--enable-clocale=gnu --with-system-zlib --enable-shared --with-demangler-in-ld
--enable-cloog-backend=isl --with-fpmath=sse --prefix=$PREFIX
--enable-languages=c,c++,fortran
$ make -j24
...
make[2]: Entering directory `/export/users/kyukhin/ws_ref/4.6_build'
make[3]: Entering directory `/export/users/kyukhin/ws_ref/4.6_build'
rm -f stage_current
make[3]: Leaving directory `/export/users/kyukhin/ws_ref/4.6_build'
Comparing stages 2 and 3
warning: gcc/cc1plus-checksum.o differs
warning: gcc/cc1-checksum.o differs
Bootstrap comparison failure!
gcc/tree-ssa-loop-im.o differs
gcc/loop-iv.o differs
gcc/ira-build.o differs
gcc/reload.o differs
gcc/gcov.o differs
gcc/tree-vect-stmts.o differs
gcc/tree-vrp.o differs
gcc/reload1.o differs
gcc/bb-reorder.o differs
gcc/real.o differs
gcc/ira.o differs
gcc/dwarf2out.o differs
gcc/tree-ssa-loop-prefetch.o differs
gcc/fold-const.o differs
gcc/ira-emit.o differs
gcc/cfgexpand.o differs
gcc/build/genautomata.o differs
gcc/omega.o differs
gcc/ira-conflicts.o differs
gcc/gcc.o differs
gcc/store-motion.o differs
gcc/ipa-split.o differs
gcc/sel-sched.o differs
gcc/plugin.o differs
gcc/tree-predcom.o differs
gcc/driver-i386.o differs
gcc/tree.o differs
libcpp/directives.o differs
libcpp/charset.o differs
libcpp/traditional.o differs
libcpp/expr.o differs
libdecnumber/bid2dpd_dpd2bid.o differs
libiberty/sha1.o differs
libiberty/pic/sha1.o differs
lto-plugin/.libs/lto-plugin.o differs
make[2]: *** [compare] Error 1
make[2]: Leaving directory `/export/users/kyukhin/ws_ref/4.6_build'
make[1]: *** [stage3-bubble] Error 2
make[1]: Leaving directory `/export/users/kyukhin/ws_ref/4.6_build'
make: *** [all] Error 2

[Bug bootstrap/50543] Bootstrap fails to build for latest 4.6.0

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50543

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-09-27 14:39:05 UTC ---
what do you mean latest 4.6.0?  the 4.6.0 release, or the latest sources on the
4.6 branch? (which will become 4.6.2)

[Bug bootstrap/50543] Bootstrap fails to build for latest 4.6.0

[kirill.yukhin at intel dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50543

--- Comment #2 from Yukhin Kirill <kirill.yukhin at intel dot com> 2011-09-27 16:17:15 UTC ---
(In reply to comment #1)
> what do you mean latest 4.6.0?  the 4.6.0 release, or the latest sources on the
> 4.6 branch? (which will become 4.6.2)

Latest sources. Sorry for misunderstanding

[Bug bootstrap/50543] Bootstrap fails to build for latest 4.6

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50543

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Version|4.6.2                       |4.6.0

--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> 2011-09-27 17:18:56 UTC ---
What are the last known working revision and non-working revision?

[Bug bootstrap/50543] Bootstrap fails to build for latest 4.6

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50543

--- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> 2011-09-27 20:29:55 UTC ---
I have no problem with

/export/gnu/import/git/gcc-release/configure --enable-clocale=gnu
--with-system-zlib --with-demangler-in-ld --enable-languages=c,c++ i686-linux
--prefix=/usr/gcc-4.6.2-corei7 --with-local-prefix=/usr/local
--enable-gnu-indirect-function --with-arch=corei7 --with-cpu=corei7
--with-fpmath=sse

on gcc-4_6-branch at revision 179242.

[Bug bootstrap/50543] Bootstrap fails to build for latest 4.6

[kirill.yukhin at intel dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50543

--- Comment #5 from Yukhin Kirill <kirill.yukhin at intel dot com> 2011-09-28 07:30:46 UTC ---
(In reply to comment #4)
> I have no problem with
> 
> /export/gnu/import/git/gcc-release/configure --enable-clocale=gnu
> --with-system-zlib --with-demangler-in-ld --enable-languages=c,c++ i686-linux
> --prefix=/usr/gcc-4.6.2-corei7 --with-local-prefix=/usr/local
> --enable-gnu-indirect-function --with-arch=corei7 --with-cpu=corei7
> --with-fpmath=sse
> 
> on gcc-4_6-branch at revision 179242.

That it strange. 
Build fails from first svn 4.6 branch revision.
Trunk had the same problem which was fixed on 20110729 between svn revisions
176852 176905.

[Bug bootstrap/50543] Bootstrap fails to build for latest 4.6

[evstupac at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50543

Stupachenko Evgeny <evstupac at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |evstupac at gmail dot com

--- Comment #6 from Stupachenko Evgeny <evstupac at gmail dot com> 2011-09-28 15:17:04 UTC ---
First good svn revision on trunk: 176871

Corresponding commit:

commit 6b4db1bd8cef61c66671c8249c21f6fdc8ccce06
Author: hjl <hjl@138bc75d-0d04-0410-961f-82ee72b054a4>
Date:   Thu Jul 28 14:29:38 2011 +0000

    Set need_64bit_hwint to yes for x86 targets.

    gcc/

    2011-07-28  H.J. Lu  <hongjiu.lu@intel.com>

        * config.gcc: Set need_64bit_hwint to yes for x86 targets.

    libcpp/

    2011-07-28  H.J. Lu  <hongjiu.lu@intel.com>

        * configure.ac: Set need_64bit_hwint to yes for x86 targets.
        * configure: Regenerated.

gcc-4.6 build with corresponding patch passed.

[Bug bootstrap/50543] Bootstrap fails to build for latest 4.6

[kirill.yukhin at intel dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50543

--- Comment #7 from Yukhin Kirill <kirill.yukhin at intel dot com> 2011-09-28 19:42:52 UTC ---
Anybody but me and Evgeny can confirm that?

I've tried really general path of build it and got fail to compare different
stages...

[Bug bootstrap/50543] Bootstrap fails to build for latest 4.6

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=50543

H.J. Lu <hjl.tools at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |WONTFIX
   Target Milestone|---                         |4.6.0

--- Comment #8 from H.J. Lu <hjl.tools at gmail dot com> ---
4.6 branch is closed.