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

[David Burns]

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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