[Dune] Linking with OS X 10.9 Mavericks

[Benedikt Oswald]

Hello

yes I agree, a wonderful mess of a very high order!

I think it is …acceptable… to compile with some degree of optimisation by default,
in fact, we always compile with -O2. I think it is still far better than to patch system
based header files. I have some hope that Apple will soon make sure to clean it up.

Greetings and thanks for the support! Benedikt




On 29 Jan 2014, at 17:26, Steffen Müthing <steffen.muething at iwr.uni-heidelberg.de> wrote:

> 
> Am 29.01.2014 um 16:46 schrieb Steffen Müthing <steffen.muething at iwr.uni-heidelberg.de>:
> 
>> Am 29.01.2014 um 16:42 schrieb Benedikt Oswald <benedikt.oswald at lspr.ch>:
>> 
>>> amazing, using on my system:
>>> 
>>> CMAKE_FLAGS="--enable-experimental-grid-extensions --enable-shared --enable-static -DCMAKE_CXX_FLAGS=\"-O2\" -DCMAKE_PREFIX_PATH=\"$HOME/extlib/alugrid/1.96/openmpi/1.6.5/gcc/4.8.1;$HOME/extlib/metis/5.1.0/gcc/4.8.1;$HOME/extlib/parmetis/4.0.3/openmpi/1.6.5/gcc/4.8.1\" " 
>>> 
>>> 
>>> in the opts file, it links the dune-grid-howto examples…and runs through…what a nasty difference this makes!
>> 
>> Yes, the Stackoverflow thread suggests that -Ox (x > 0) triggers inlining of toupper(), which
>> makes the whole problem at the linker stage go away…
>> 
>> But for some reason, the autotools-based build works (and the resulting programs work). Unfortunately,
>> there’s all kinds of OS X linker magic in the command line, like flat vs. nested library namespaces…
> 
> Seems like that conclusion was a little too early, a complete new checkout and build from scratch causes
> autotools to fail as well with -O0. The main difference is that the autotools-generated binaries crash at
> run time instead of triggering a link time failure because libtool sets -Wl,-undefined,dynamic_lookup
> which defers lookup of unknown symbols to the dynamic linker.
> 
> So it looks like the only ways around this problem are to either use at least -O1 or patch a system header.
> What a mess…
> 
> Steffen
> 
> 
>> 
>> Steffen
>> 
>> 
>>> 
>>> Greetings, Benedikt
>>> 
>>> 
>>> On 29 Jan 2014, at 16:34, Steffen Müthing <steffen.muething at iwr.uni-heidelberg.de> wrote:
>>> 
>>>> Looking at the link Christoph posted earlier, I realized that my build was setup
>>>> with optimization (-O3), which avoids the problem as well. So I rebuilt everything
>>>> from scratch with -O0, and now my CMake build fails with the same error as
>>>> Benedikt’s.
>>>> 
>>>> I’m running an -O0 build with autotools right now…
>>>> 
>>>> Steffen
>>>> 
>>>> Am 29.01.2014 um 16:19 schrieb Markus Blatt <markus at dr-blatt.de>:
>>>> 
>>>>> On Wed, Jan 29, 2014 at 03:04:39PM +0100, Benedikt Oswald wrote:
>>>>>> one more point to consider:
>>>>>> 
>>>>>> the compilation does not run unto this problem when using the autotools based build.
>>>>>> what could be the reason for this ?
>>>>> 
>>>>> that is indeed interesting. Maybe libtool is very smart. Could you
>>>>> please provide the linker lines when using autotools.
>>>>> 
>>>>> -- 
>>>>> Do you need more support with DUNE or HPC in general? 
>>>>> 
>>>>> Dr. Markus Blatt - HPC-Simulation-Software & Services http://www.dr-blatt.de
>>>>> Hans-Bunte-Str. 8-10, 69123 Heidelberg, Germany
>>>>> Tel.: +49 (0) 160 97590858  Fax: +49 (0)322 1108991658 
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