Re: Compile error with gcc 4.4.0

From: Axel Naumann <Axel.Naumann_at_cern.ch>
Date: Wed, 6 May 2009 15:12:07 +0200

Hi Pete,

thanks for your findings; if Philippe doesn't manage to study this today I'll do so tomorrow.

Btw, something completely different: did you ever try the not-so-new-anymore "google" linker called gold? Does is improve the link time? I can imagine you spend a lot of time in there...

Anyway, you'll hear from us today or tomorrow!

Cheers, Axel.

On 2009-05-06 06:12, Peter Elmer wrote:
> Hi Axel,
>
> On Wed, May 06, 2009 at 05:00:49AM +0200, Peter Elmer wrote:

>> On Tue, Apr 14, 2009 at 09:48:53AM +0200, Axel Naumann wrote:
>>> there is no official release of GCC 4.4 yet, so whatever Red Hat 
>>> released is their home grown thing. And apparently it has a bug, or 
>>> there is an issue with the setup. As a hint: I have the requested symbol 
>>> in lib/libRIO.so; it's generated (as a weak symbol) from 
>>> io/io/src/TStreamerInfoReadBuffer.cxx, both the function definition and 
>>> the template instantiation happen in there, so it's also in 
>>> io/io/src/TStreamerInfoReadBuffer.o.
>>   FWIW, I see (more or less) the same error:
>>
>> lib/libRIO.so: undefined reference to `int TStreamerInfo::ReadBuffer<TVirtualArr
>> ay>(TBuffer&, TVirtualArray const&, int, int, int, int)'
>> lib/libRIO.so: undefined reference to `int TStreamerInfo::ReadBuffer<char**>(TBu
>> ffer&, char** const&, int, int, int, int)'
>> collect2: ld returned 1 exit status
>> make: *** [bin/hadd] Error 1
>>
>> with the (now released) official version of gcc4.4.0 on SLC5, when building
>> ROOT 5.22/00a. I can't tell from what you wrote above whether you know
>> what could be wrong or not... ;-) 

>
> Looking at the TStreamerInfoReadBuffer.o from a gcc4.3.2 build and from a
> gcc4.4.0 build, I see that the former indeed has 4 symbols missing in the
> latter:
>
> 0000000000000000 W int TStreamerInfo::ReadBuffer<TVirtualArray>(TBuffer&, TVirtualArray const&, int, int, int, int)
> 0000000000000000 W int TStreamerInfo::ReadBuffer<TVirtualCollectionProxy>(TBuffer&, TVirtualCollectionProxy const&, int, int, int, int)
> 0000000000000000 W int TStreamerInfo::ReadBuffer<TStreamerInfo::TPointerCollectionAdapter>(TBuffer&, TStreamerInfo::TPointerCollectionAdapter const&, int, int, int, int)
> 0000000000000000 W int TStreamerInfo::ReadBuffer<char**>(TBuffer&, char** const&, int, int, int, int)
>
> Where exactly are these being instantiated in TStreamerInfoReadBuffer.cxx?
> (Ah, perhaps with one of the #ifdef R__BROKEN_FUNCTION_TEMPLATES sections?
> That isn't defined here for linux/gcc44, though, is it? Or is it somewhere
> else I'm not seeing with 6:00AM vision?)
>
> Pete
>
> -------------------------------------------------------------------------
> Peter Elmer E-mail: Peter.Elmer_at_cern.ch Phone: +41 (22) 767-4644
> Address: CERN Division PPE, Bat. 32 2C-14, CH-1211 Geneva 23, Switzerland
> -------------------------------------------------------------------------
>
Received on Wed May 06 2009 - 15:12:18 CEST