__Unwind_GetIPInfo on Darwin 8.11

[Geoff Keating]

On 26/11/2008, at 4:16 PM, Jack Howarth wrote:

> On Wed, Nov 26, 2008 at 01:22:35PM -0800, Geoffrey Keating wrote:
>> Jack Howarth <howarth@bromo.med.uc.edu> writes:
>>
>>> Iain,
>>>  The use of the system libgcc simply won't work on Mac OS X 10.4.
>>> The missing __Unwind_GetIPInfo only exists in libgcc_s.10.5.dylib
>>> and not libgcc_s.10.4.dylib...
>>
>> Replacing or modifying the system libgcc is not recommended and may
>> break in the next version of Mac OS X.  It's not clear to me what  
>> this
>> will mean for GCC development.
>>
>> You can see the exact commands the regression tester used in the  
>> build
>> log file at
>> <http://gcc.gnu.org/regtest/HEAD/native-lastbuild.txt.gzip>;  
>> basically,
>>
>> + /Users/regress/tbox/svn-gcc/configure --prefix=/Users/regress/ 
>> tbox/objs --target=powerpc-apple-darwin8.5.0
>> + make -j2 bootstrap
>> + make -j2 -k check
>>
>> No extra flags, no moving stuff around, nothing added or deleted from
>> the GCC source tree; that would defeat the purpose of the regression
>> tester, which is to test the actual GCC in the repository.  There is
>> some strangeness in the system configuration: GMP and MPFR are
>> installed in /usr/local as static libraries, and I seem to
>> remember the system is running with a modified kernel, containing a
>> patch which makes dejagnu work, which is why it's running 10.4.5.
>>
>> 10.4.11 is significantly different from 10.4.5 and from 10.5.  I
>> believe it adds a shared libgcc and libstdc++.  It may be that GCC
>> does not work on 10.4.11.
>>
>> You can find the exact scripts the tester uses to run the build in
>> contrib/regression in the GCC source tree.  The tester checks out the
>> tree and runs the scripts from the checkout.
>
> Geoff,
>  I think you misunderstood my intention with that statement. I wasn't
> suggesting that Iain move a libgcc.so.10.5.dylib onto a different  
> machine.
> Rather I meant that the offending symbol, __Unwind_GetIPInfo, was  
> only added
> to the system libgcc for 10.5 so that Tiger's system libgcc would  
> never
> be able to provide it.

I should correct an earlier statement of mine: 10.4.11 does not add a  
shared libgcc.  My 10.4.5 machine has a shared libgcc which indeed  
does not have __Unwind_GetIPInfo.  However, this does not prevent GCC  
building on it.
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