[LLVMdev] gcc 4.8.x dragonegg support

[Jack Howarth]

On Sat, May 11, 2013 at 09:53:08PM +0200, Duncan Sands wrote:
> Hi Jack,
>
> On 09/05/13 18:21, Jack Howarth wrote:
>> On Wed, May 08, 2013 at 06:53:05AM -0700, Peter Collingbourne wrote:
>>> On Wed, May 08, 2013 at 09:25:55AM -0400, Jack Howarth wrote:
>>>> Duncan,
>>>>      I was wondering if you plan on supporting the build of dragonegg under gcc 4.8.1svn
>>>> for the llvm 3.3 release? Is the deprecation and poisoning of IDENT_ASM_OP too problematic
>>>> to work around without some additional substitute being added in FSF gcc upstream?
>>>
>>> Hi Jack,
>>>
>>> There's a patch under review to add gcc 4.8 support:
>>> http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20130401/170127.html
>>
>> Peter,
>>     Thanks. With the second patch applied, current dragonegg 3.3svn builds under FSF gcc 4.8.1svn
>> with the plugin header fix applied. There appears to be a regression in the Polyhedron 2005
>> benchmarks for aermod and rnflow. The first fails to compile with the errror...
>>
>> % /sw/lib/gcc4.8/bin/gfortran -fplugin=/sw/lib/gcc4.8/lib/dragonegg.so -specs=/sw/lib/gcc4.8/lib/integrated-as.specs -O1  aermod.f90 -o aermod
>
> does it happen without -specs=/sw/lib/gcc4.8/lib/integrated-as.specs ?
>

Yes this undefined symbol also occurs without -specs=/sw/lib/gcc4.8/lib/integrated-as.specs. I believe this breakage in dragonegg
with gcc 4.8.0 is fallout from the change...

http://gcc.gnu.org/ml/gcc-patches/2012-03/msg01100.html

              Jack

> Ciao, Duncan.
>
>> Undefined symbols for architecture x86_64:
>>    "_iround", referenced from:
>>        _stodbl_ in ccZmJVlP.o
>>        _evper_ in ccZmJVlP.o
>>    "_iroundf", referenced from:
>>        _aver_ in ccZmJVlP.o
>>        _vdp_ in ccZmJVlP.o
>>        _stonum_ in ccZmJVlP.o
>>        _terrst_ in ccZmJVlP.o
>>        _hrqext_ in ccZmJVlP.o
>>        _averev_ in ccZmJVlP.o
>>        _wake_dfsn2_ in ccZmJVlP.o
>>        ...
>> ld: symbol(s) not found for architecture x86_64
>> collect2: error: ld returned 1 exit status
>>
>> and the second as...
>>
>> % /sw/lib/gcc4.8/bin/gfortran -fplugin=/sw/lib/gcc4.8/lib/dragonegg.so -specs=/sw/lib/gcc4.8/lib/integrated-as.specs -O1 rnflow.f90 -o rnflow
>> Undefined symbols for architecture x86_64:
>>    "_iroundf", referenced from:
>>        _cmpmat_ in ccaC6IRb.o
>>        _MAIN__ in ccaC6IRb.o
>> ld: symbol(s) not found for architecture x86_64
>> collect2: error: ld returned 1 exit status
>>
>>           Jack
>>
>>>
>>> Part of that patch has already been applied.  I gather that Duncan
>>> has been busy with conference organisation so it may take some time
>>> for him to review the rest of it.
>>>
>>> Thanks,
>>> --
>>> Peter