[vtk-developers] Errors when compiling VTK v6.0.0 in C++11 mode

David Gobbi david.gobbi at gmail.com
Tue Jul 16 10:21:06 EDT 2013


Hi Robert,

I tried.  Turns out that CHECK_CXX_SYMBOL_EXISTS is only for
preprocessor symbols or symbols with C linkage, the only difference
from CHECK_SYMBOL_EXISTS is that it does these checks with a C++
compiler.  It will always return false when used to check for
std::isnan.

- David

On Tue, Jul 16, 2013 at 7:42 AM, Robert Maynard
<robert.maynard at kitware.com> wrote:
> If you need to use the c++ compiler to verify that symbols exist
> inside a namespace, you should use CHECK_CXX_SYMBOL_EXISTS.
>
> On Sat, Jul 13, 2013 at 1:21 PM, David Gobbi <david.gobbi at gmail.com> wrote:
>> Hi Kevin,
>>
>> Thanks for the report.  I believe that this can be fixed.  The patch
>> that Kyle provided will not work (we already tried that in earlier
>> rounds of testing) so now I am investigating in more depth. I've
>> discovered that our cmake check for VTK_HAS_STD_ISINF doesn't work
>> because cmake's check_symbol_exists() function uses the C compiler,
>> rather than the C++ compiler, for its try_compile and therefore
>> doesn't work with namespaced functions.  I hope to have a patch up on
>> gerrit soon.
>>
>>  - David
>>
>> On Sat, Jul 13, 2013 at 4:51 AM, Sean McBride <sean at rogue-research.com> wrote:
>>> On Wed, 10 Jul 2013 16:31:47 +0200, Kevin Funk said:
>>>
>>>>/home/krf/devel/src/VTK-master/Common/Core/vtkMath.h: In static member
>>>>function 'static int vtkMath::IsInf(double)':
>>>>/home/krf/devel/src/VTK-master/Common/Core/vtkMath.h:1249:18: error: call of
>>>>overloaded 'isinf(double&)' is ambiguous
>>>>
>>>> *SNIP*
>>>>
>>>>Since there are C++11 checks all over the code base I'd assume one can
>>>>compile
>>>>VTK in C++11 mode.
>>>
>>> With which compiler, standard library, and OS do you see this?
>>>
>>> My Rogue7 dashboard builds as C++11 nightly with clang on OS X, and this doesn't happen there.
>>>
>>> The patch looks reasonable, but this code is fragile, it took David Gobbi and I a while to get it working with all (mmmm, most!) compiler/library/OS/language combinations.
>>>
>>> I'm away on vacation, and have no VTK or compiler to look at this until next week, but maybe David can...
>>>
>>> Cheers,
>>>
>>> --
>>> ____________________________________________________________
>>> Sean McBride, B. Eng                 sean at rogue-research.com
>>> Rogue Research                        www.rogue-research.com
>>> Mac Software Developer              Montréal, Québec, Canada
>>>
>>>
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