GCC 4.5 is uncompilable

GCC 4.5 is uncompilable

[Piotr Wyderski]

An attempt to build either gcc-trunk or the most recent
snapshot (20091119) with Cygwin (the build compiler
is either GCC 4.4.0 or 4.5-20090604), configured as:

$ ../configure --prefix=/opt/gcc-4.5-20091119 -v --enable-bootstrap --enable-ve
rsion-specific-runtime-libs --enable-shared --enable-shared-libgcc --with-gnu-l
d --with-gnu-as --enable-dwarf2-exceptions --disable-symvers --disable-nls --wi
th-arch=core2 --with-tune=generic --enable-threads=posix --enable-languages=c,c
++

fails with the following message:

[...]
 mv ./shlib/libgcc_s.dll.a.tmp ./shlib/libgcc_s.dll.a
/usr/bin/ld: unrecognized -a option `ware'
collect2: ld returned 1 exit status
make[3]: *** [libgcc_s.dll] Error 1
make[3]: Leaving directory `/home/piotr.wyderski/build/gcc-4.5-20091119/objdir/i
686-pc-cygwin/libgcc'
make[2]: *** [all-stage1-target-libgcc] Error 2
make[2]: Leaving directory `/home/piotr.wyderski/build/gcc-4.5-20091119/objdir'
make[1]: *** [stage1-bubble] Error 2
make[1]: Leaving directory `/home/piotr.wyderski/build/gcc-4.5-20091119/objdir'
make: *** [all] Error 2

Re: GCC 4.5 is uncompilable

[Kai Tietz]

2009/11/20 Piotr Wyderski <piotr.wyderski@gmail.com>:
> An attempt to build either gcc-trunk or the most recent
> snapshot (20091119) with Cygwin (the build compiler
> is either GCC 4.4.0 or 4.5-20090604), configured as:
>
> $ ../configure --prefix=/opt/gcc-4.5-20091119 -v --enable-bootstrap --enable-ve
> rsion-specific-runtime-libs --enable-shared --enable-shared-libgcc --with-gnu-l
> d --with-gnu-as --enable-dwarf2-exceptions --disable-symvers --disable-nls --wi
> th-arch=core2 --with-tune=generic --enable-threads=posix --enable-languages=c,c
> ++
>
> fails with the following message:
>
> [...]
>  mv ./shlib/libgcc_s.dll.a.tmp ./shlib/libgcc_s.dll.a
> /usr/bin/ld: unrecognized -a option `ware'
> collect2: ld returned 1 exit status
> make[3]: *** [libgcc_s.dll] Error 1
> make[3]: Leaving directory `/home/piotr.wyderski/build/gcc-4.5-20091119/objdir/i
> 686-pc-cygwin/libgcc'
> make[2]: *** [all-stage1-target-libgcc] Error 2
> make[2]: Leaving directory `/home/piotr.wyderski/build/gcc-4.5-20091119/objdir'
> make[1]: *** [stage1-bubble] Error 2
> make[1]: Leaving directory `/home/piotr.wyderski/build/gcc-4.5-20091119/objdir'
> make: *** [all] Error 2
>

This error you get is more related to used binutils version.The
warning you get looks more like a cripled '-Wl,--tsaware'. Which
binutils version you are using?

Cheers,
Kai

-- 
|  (\_/) This is Bunny. Copy and paste
| (='.'=) Bunny into your signature to help
| (")_(") him gain world domination

Re: GCC 4.5 is uncompilable

[Piotr Wyderski]

Kai Tietz wrote:

> This error you get is more related to used binutils version.The
> warning you get looks more like a cripled '-Wl,--tsaware'.

Thanks, that looks like a good explanation.

> Which binutils version you are using?

$ ld -v
GNU ld (GNU Binutils) 2.18.50.20080625

I'll try to upgrade binutils and then repeat the build process.

Best regards
Piotr Wyderski

Re: GCC 4.5 is uncompilable

[Dave Korn]

Piotr Wyderski wrote:
> Kai Tietz wrote:
> 
>> This error you get is more related to used binutils version.The
>> warning you get looks more like a cripled '-Wl,--tsaware'.
> 
> Thanks, that looks like a good explanation.

  Yes, I added this to HEAD recently

>> Which binutils version you are using?
> 
> $ ld -v
> GNU ld (GNU Binutils) 2.18.50.20080625
> 
> I'll try to upgrade binutils and then repeat the build process.

  If that doesn't fix it please let me know.  BTW I'm currently bootstrapping
r.154370 and it's got as far as building the target libraries post stage 3
without any sign of this problem, so you should be ok.

    cheers,
      DaveK

Re: GCC 4.5 is uncompilable

[Richard Guenther]

On Fri, Nov 20, 2009 at 9:06 PM, Dave Korn
<dave.korn.cygwin@googlemail.com> wrote:
> Piotr Wyderski wrote:
>> Kai Tietz wrote:
>>
>>> This error you get is more related to used binutils version.The
>>> warning you get looks more like a cripled '-Wl,--tsaware'.
>>
>> Thanks, that looks like a good explanation.
>
>  Yes, I added this to HEAD recently
>
>>> Which binutils version you are using?
>>
>> $ ld -v
>> GNU ld (GNU Binutils) 2.18.50.20080625
>>
>> I'll try to upgrade binutils and then repeat the build process.
>
>  If that doesn't fix it please let me know.  BTW I'm currently bootstrapping
> r.154370 and it's got as far as building the target libraries post stage 3
> without any sign of this problem, so you should be ok.

You should add the minimal required binutils version for cycwin to the
install section
of the manual.

Richard.

Re: GCC 4.5 is uncompilable

[Piotr Wyderski]

Dave Korn wrote:

>  If that doesn't fix it please let me know.

The solution was correct, with binutils 2.20
the problem disappeared. There is another
one, however on the snapshot 20091119:

../../gcc/lto-streamer-out.c: In function 'write_global_references':
../../gcc/lto-streamer-out.c:2201:7: error: passing argument 3 of 'lto_streamer_
cache_lookup' from incompatible pointer type
../../gcc/lto-streamer.h:790:13: note: expected 'int *' but argument is of type
'int32_t *'

which is a source code bug: a local variable ref of type
int32_t is passed by pointer to a function which takes int*.
Don't know about trunk, as I just started building it.

Best regards
Piotr Wyderski

Re: GCC 4.5 is uncompilable

[Dave Korn]

Piotr Wyderski wrote:
> Dave Korn wrote:
> 
>>  If that doesn't fix it please let me know.
> 
> The solution was correct, with binutils 2.20
> the problem disappeared. There is another
> one, however on the snapshot 20091119:
> 
> ../../gcc/lto-streamer-out.c: In function 'write_global_references':
> ../../gcc/lto-streamer-out.c:2201:7: error: passing argument 3 of 'lto_streamer_
> cache_lookup' from incompatible pointer type
> ../../gcc/lto-streamer.h:790:13: note: expected 'int *' but argument is of type
> 'int32_t *'
> 
> which is a source code bug: a local variable ref of type
> int32_t is passed by pointer to a function which takes int*.
> Don't know about trunk, as I just started building it.

  One of the problems with snapshots; sometimes they capture the state of
trunk while it has a bug extant.  I have successfully compiled HEAD at
r.154370 and r.154010 recently.

    cheers,
      DaveK

Re: GCC 4.5 is uncompilable

[Dave Korn]

Matt wrote:
> Hey Dave,
> 
> What OS are you bootstrapping on, and with which compiler/version?
> (Cygwin, I assume, but you never know ;>)

  Yep, Cygwin native using 4.3.4 as bootstrap compiler.

> I haven't been able to bootstrap for a few weeks, but no one answered my
> email for help (which probably got lost in the kernel-related fighting):

  rofl Linus is such a git!  I didn't notice his apology for having screwed up
so badly and flamed everyone over nothing, did you?

> http://gcc.gnu.org/ml/gcc/2009-11/msg00476.html
> 
> The code in question definitely looks like the uninitialized warning
> (reported as error) is valid. I'm surprised no one else has been seeing
> this, unless they aren't bootstrapping using 4.4.1 or above.

  Like I said, 4.3.4 (and occasionally I bootstrap HEAD with itself), but this
is one of those areas where false positives/negatives come and go.

> Any help is appreciated -- I really want to get cracking on testing 4.5.

  I read the code in ira-lives.c; it is very clearly not used uninitialised,
so this is undoubtedly a bug in your bootstrap compiler.  File a PR,
reconfigure your tree using --disable-werror, and off you go.

    cheers,
      DaveK

Re: GCC 4.5 is uncompilable

[Matt]

Hey Dave,

What OS are you bootstrapping on, and with which compiler/version? 
(Cygwin, I assume, but you never know 
;>)

I haven't been able to bootstrap for a few weeks, but no one answered my 
email for help (which probably got lost in the kernel-related fighting):
http://gcc.gnu.org/ml/gcc/2009-11/msg00476.html

The code in question definitely looks like the uninitialized warning 
(reported as error) is valid. I'm surprised no one else has been seeing 
this, unless they aren't bootstrapping using 4.4.1 or above.

Any help is appreciated -- I really want to get cracking on testing 4.5.

Thanks!




--
tangled strands of DNA explain the way that I behave.
http://www.clock.org/~matt