Re: [ping] Re: [patch] PR40134, use a linker script on arm-linux to link with -lgcc_s -lgcc

[Matthias Klose <doko@ubuntu.com>]

On 24.09.2009 10:42, Andrew Haley wrote:
> Matthias Klose wrote:
>> On 22.09.2009 17:56, Andrew Haley wrote:
>>> Matthias Klose wrote:
>>>> On 11.09.2009 19:12, Matthias Klose wrote:
>>>
>>>>> Applied and checked the attach patch on top of your patch, ran the
>>>>> testsuite without regressions (applied the patch for pr40133 from Paolo
>>>>> for the same test run as well).
>>>>>
>>>>> Matthias
>>>>
>>>> updated the patch to only for arm*-*-linux-*eabi; test results at
>>>> http://gcc.gnu.org/ml/gcc-testresults/2009-09/msg02000.html
>>>>
>>>> Ok for the trunk?
>>>
>>> I'm not at all happy that backtraces are failing now on Java, but I
>>> guess your
>>> patch didn't cause that.  OK by me.
>>
>> Without this patch, the build of libjava fails on arm*-*-linux-*eabi:
>>
>> /usr/bin/ld: .libs/jv-convert: hidden symbol `__sync_synchronize' in
>> /root/gcc/newgccsnapshot/gcc-snapshot-20090919/build/./gcc/libgcc.a(linux-atomic.o)
>> is referenced by DSO
>> /usr/bin/ld: final link failed: Nonrepresentable section on output
>> collect2: ld returned 1 exit status
>> make[5]: *** [jv-convert] Error 1
>>
>> Full buildlog at http://people.debian.org/~doko/tmp/snapshot.log.bz2
>>
>> The reason for this is not linking the shared libgcj with -lgcc.
>
> I find this extremely surprising.  LDFLAGS are explicitly set to do
> that when building libgcc.  I did this myself, and I'm pretty sure that
> it works.
>
> svn diff -r150701:150702

The setting of LDFLAGS to "-Wl,-lgcc" (working around libtool assumptions) in 
the Makefile gets overwritten to the empty value when called by the toplevel 
make, so this has no effect.  The intent to do this with a linker script was to 
have it done for every usage.

>> Am I allowed to check in this patch to fix the build failure, or do I
>> have to wait for an approval of an ARM maintainer?
>
> I think you need an ARM maintainer, but I first want to know why your
> build isn't linking with libgcc.

Ok, Richard is seems to be in vacation until early October.

   Matthias