[ITK-dev] Linux c++11 build issue v4.8.2

David Burns david.mo.burns at gmail.com
Thu Dec 17 10:37:01 EST 2015 

With 4.8.2 - I built ITK with C++11 (this required -fpermissive to complete)
Despite doing that, I was still unable to built ITK applications with 
C++11 (even when also using -fpermissive).

Let me know if you've had different results. I was hoping this would be 
resolved with 4.9.

- David

On 12/17/2015 10:18 AM, Bradley Lowekamp wrote:
> Hello,
>
> I thought we are requiring ITK to be built with C++11 if your 
> application was going to be build with C++11.
>
> Is this saying we are going to support changing the C++ language after 
> CMake configuration of ITK?
>
> I would think using the C++11 features of explicit constructor delete 
> or default specifier may results is ABI compatibilities, among many 
> other things.
>
> Thanks,
> Brad
>
>
>
>> On Dec 15, 2015, at 5:06 PM, David Burns <david.mo.burns at gmail.com 
>> <mailto:david.mo.burns at gmail.com>> wrote:
>>
>> Thanks Hans, based on the release schedule it looks like that will be 
>> out pretty soon.
>>
>> That's a big improvement to ITK to add c++11 support in my opinion. 
>> Thanks.
>>
>> David
>>
>> On 12/15/15 15:36, Johnson, Hans J wrote:
>>> This will be fixed when VXL is updated after the 4.9 release.
>>>
>>> Hans
>>>
>>>
>>> From: Insight-developers <insight-developers-bounces at itk.org 
>>> <mailto:insight-developers-bounces at itk.org>> on behalf of David 
>>> Burns <david.mo.burns at gmail.com <mailto:david.mo.burns at gmail.com>>
>>> Date: Tuesday, December 15, 2015 at 2:10 PM
>>> To: "insight-developers at itk.org" <insight-developers at itk.org 
>>> <mailto:insight-developers at itk.org>>
>>> Subject: [ITK-dev] Linux c++11 build issue v4.8.2
>>>
>>> Dear Insight Developers
>>>
>>> I have compiled v4.8.2 on Ubuntu 14.04 successfully (g++ 4.8), 
>>> however, I get compiler errors when building my own ITK applications 
>>> with the following cmake flag
>>>
>>> set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11"
>>>
>>> I can compile ITK applications when not using this flag.
>>>
>>> I have tried using -fpermissive when building my application. I have 
>>> also tried compiling ITK using -std=c++11 -fpermissive, individually 
>>> and in combination. I always get the same errors.
>>>
>>> Any suggestions would be welcome. Thanks
>>>
>>> David
>>>
>>>
>>>
>>> Compiler errors
>>>
>>> /usr/local/include/ITK-4.8/vnl/vnl_numeric_traits.h:387:60: warning: 
>>> 'constexpr' needed for in-class initialization of static data member 
>>> 'const float vnl_numeric_traits<float>::zero' of non-integral type 
>>> [-fpermissive]
>>>    static const float zero VCL_STATIC_CONST_INIT_FLOAT_DECL(0.0F);
>>> ^
>>> /usr/local/include/ITK-4.8/vcl_config_compiler.h:152:48: note: in 
>>> definition of macro 'VCL_STATIC_CONST_INIT_FLOAT_DECL'
>>>  # define VCL_STATIC_CONST_INIT_FLOAT_DECL(x) = x
>>> ^
>>> /usr/local/include/ITK-4.8/vnl/vnl_numeric_traits.h:389:59: warning: 
>>> 'constexpr' needed for in-class initialization of static data member 
>>> 'const float vnl_numeric_traits<float>::one' of non-integral type 
>>> [-fpermissive]
>>>    static const float one VCL_STATIC_CONST_INIT_FLOAT_DECL(1.0F);
>>> ^
>>> /usr/local/include/ITK-4.8/vcl_config_compiler.h:152:48: note: in 
>>> definition of macro 'VCL_STATIC_CONST_INIT_FLOAT_DECL'
>>>  # define VCL_STATIC_CONST_INIT_FLOAT_DECL(x) = x
>>> ^
>>> /usr/local/include/ITK-4.8/vnl/vnl_numeric_traits.h:391:62: warning: 
>>> 'constexpr' needed for in-class initialization of static data member 
>>> 'const float vnl_numeric_traits<float>::maxval' of non-integral type 
>>> [-fpermissive]
>>>    static const float maxval 
>>> VCL_STATIC_CONST_INIT_FLOAT_DECL(3.40282346638528860e+38F);
>>> ^
>>> /usr/local/include/ITK-4.8/vcl_config_compiler.h:152:48: note: in 
>>> definition of macro 'VCL_STATIC_CONST_INIT_FLOAT_DECL'
>>>  # define VCL_STATIC_CONST_INIT_FLOAT_DECL(x) = x
>>> ^
>>> /usr/local/include/ITK-4.8/vnl/vnl_numeric_traits.h:410:61: warning: 
>>> 'constexpr' needed for in-class initialization of static data member 
>>> 'const double vnl_numeric_traits<double>::zero' of non-integral type 
>>> [-fpermissive]
>>>    static const double zero VCL_STATIC_CONST_INIT_FLOAT_DECL(0.0);
>>> ^
>>> /usr/local/include/ITK-4.8/vcl_config_compiler.h:152:48: note: in 
>>> definition of macro 'VCL_STATIC_CONST_INIT_FLOAT_DECL'
>>>  # define VCL_STATIC_CONST_INIT_FLOAT_DECL(x) = x
>>> ^
>>> /usr/local/include/ITK-4.8/vnl/vnl_numeric_traits.h:412:60: warning: 
>>> 'constexpr' needed for in-class initialization of static data member 
>>> 'const double vnl_numeric_traits<double>::one' of non-integral type 
>>> [-fpermissive]
>>>    static const double one VCL_STATIC_CONST_INIT_FLOAT_DECL(1.0);
>>> ^
>>> /usr/local/include/ITK-4.8/vcl_config_compiler.h:152:48: note: in 
>>> definition of macro 'VCL_STATIC_CONST_INIT_FLOAT_DECL'
>>>  # define VCL_STATIC_CONST_INIT_FLOAT_DECL(x) = x
>>> ^
>>> /usr/local/include/ITK-4.8/vnl/vnl_numeric_traits.h:414:63: warning: 
>>> 'constexpr' needed for in-class initialization of static data member 
>>> 'const double vnl_numeric_traits<double>::maxval' of non-integral 
>>> type [-fpermissive]
>>>    static const double maxval 
>>> VCL_STATIC_CONST_INIT_FLOAT_DECL(1.7976931348623157E+308);
>>> ^
>>> /usr/local/include/ITK-4.8/vcl_config_compiler.h:152:48: note: in 
>>> definition of macro 'VCL_STATIC_CONST_INIT_FLOAT_DECL'
>>>  # define VCL_STATIC_CONST_INIT_FLOAT_DECL(x) = x
>>> ^
>>> /usr/local/include/ITK-4.8/vnl/vnl_numeric_traits.h:433:66: warning: 
>>> 'constexpr' needed for in-class initialization of static data member 
>>> 'const long double vnl_numeric_traits<long double>::zero' of 
>>> non-integral type [-fpermissive]
>>>    static const long double zero VCL_STATIC_CONST_INIT_FLOAT_DECL(0.0);
>>> ^
>>> /usr/local/include/ITK-4.8/vcl_config_compiler.h:152:48: note: in 
>>> definition of macro 'VCL_STATIC_CONST_INIT_FLOAT_DECL'
>>>  # define VCL_STATIC_CONST_INIT_FLOAT_DECL(x) = x
>>> ^
>>> /usr/local/include/ITK-4.8/vnl/vnl_numeric_traits.h:435:65: warning: 
>>> 'constexpr' needed for in-class initialization of static data member 
>>> 'const long double vnl_numeric_traits<long double>::one' of 
>>> non-integral type [-fpermissive]
>>>    static const long double one VCL_STATIC_CONST_INIT_FLOAT_DECL(1.0);
>>> ^
>>> /usr/local/include/ITK-4.8/vcl_config_compiler.h:152:48: note: in 
>>> definition of macro 'VCL_STATIC_CONST_INIT_FLOAT_DECL'
>>>  # define VCL_STATIC_CONST_INIT_FLOAT_DECL(x) = x
>>> ^
>>> /usr/local/include/ITK-4.8/vnl/vnl_numeric_traits.h:437:68: warning: 
>>> 'constexpr' needed for in-class initialization of static data member 
>>> 'const long double vnl_numeric_traits<long double>::maxval' of 
>>> non-integral type [-fpermissive]
>>>    static const long double maxval 
>>> VCL_STATIC_CONST_INIT_FLOAT_DECL(1.7976931348623157E+308);
>>> ^
>>> /usr/local/include/ITK-4.8/vcl_config_compiler.h:152:48: note: in 
>>> definition of macro 'VCL_STATIC_CONST_INIT_FLOAT_DECL'
>>>  # define VCL_STATIC_CONST_INIT_FLOAT_DECL(x) = x
>>> ^
>>>
>>>
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