[Insight-developers] compilation error when compiled with gnu++0x flag

Wed May 9 08:00:08 EDT 2012

Hi all,

When doing cmake -DCMAKE_CXX_FLAGS=-std=gnu++0x /path/to/ITK && make 
-j8, I get compilation errors in vnl_math (see below).

gcc version: 4.6.3
cmake version: 2.8.7

What would be the best way to fix these errors?

Thanks,
Arnaud

---

/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.h:87:27: 
error: ‘constexpr’ needed for in-class initialization of static data 
member ‘e’ of non-integral type
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.h:88:31: 
error: ‘constexpr’ needed for in-class initialization of static data 
member ‘log2e’ of non-integral type
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.h:89:32: 
error: ‘constexpr’ needed for in-class initialization of static data 
member ‘log10e’ of non-integral type
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.h:90:29: 
error: ‘constexpr’ needed for in-class initialization of static data 
member ‘ln2’ of non-integral type
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.h:91:30: 
error: ‘constexpr’ needed for in-class initialization of static data 
member ‘ln10’ of non-integral type
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.h:92:28: 
error: ‘constexpr’ needed for in-class initialization of static data 
member ‘pi’ of non-integral type
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.h:93:35: 
error: ‘constexpr’ needed for in-class initialization of static data 
member ‘pi_over_2’ of non-integral type
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.h:94:35: 
error: ‘constexpr’ needed for in-class initialization of static data 
member ‘pi_over_4’ of non-integral type
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.h:95:37: 
error: ‘constexpr’ needed for in-class initialization of static data 
member ‘one_over_pi’ of non-integral type
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.h:96:37: 
error: ‘constexpr’ needed for in-class initialization of static data 
member ‘two_over_pi’ of non-integral type
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.h:97:41: 
error: ‘constexpr’ needed for in-class initialization of static data 
member ‘two_over_sqrtpi’ of non-integral type
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.h:98:42: 
error: ‘constexpr’ needed for in-class initialization of static data 
member ‘one_over_sqrt2pi’ of non-integral type
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.h:99:31: 
error: ‘constexpr’ needed for in-class initialization of static data 
member ‘sqrt2’ of non-integral type
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.h:100:33: 
error: ‘constexpr’ needed for in-class initialization of static data 
member ‘sqrt1_2’ of non-integral type
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.h:101:31: 
error: ‘constexpr’ needed for in-class initialization of static data 
member ‘euler’ of non-integral type
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.h:104:29: 
error: ‘constexpr’ needed for in-class initialization of static data 
member ‘eps’ of non-integral type
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.h:105:33: 
error: ‘constexpr’ needed for in-class initialization of static data 
member ‘sqrteps’ of non-integral type
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.h:107:34: 
error: ‘constexpr’ needed for in-class initialization of static data 
member ‘float_eps’ of non-integral type
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.h:108:38: 
error: ‘constexpr’ needed for in-class initialization of static data 
member ‘float_sqrteps’ of non-integral type
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:84:24: 
error: ‘const double vnl_math::e’ is not a static member of ‘class vnl_math’
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:84:14: 
error: uninitialized const ‘vnl_math::e’ [-fpermissive]
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:85:24: 
error: ‘const double vnl_math::log2e’ is not a static member of ‘class 
vnl_math’
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:85:14: 
error: uninitialized const ‘vnl_math::log2e’ [-fpermissive]
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:86:24: 
error: ‘const double vnl_math::log10e’ is not a static member of ‘class 
vnl_math’
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:86:14: 
error: uninitialized const ‘vnl_math::log10e’ [-fpermissive]
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:87:24: 
error: ‘const double vnl_math::ln2’ is not a static member of ‘class 
vnl_math’
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:87:14: 
error: uninitialized const ‘vnl_math::ln2’ [-fpermissive]
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:88:24: 
error: ‘const double vnl_math::ln10’ is not a static member of ‘class 
vnl_math’
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:88:14: 
error: uninitialized const ‘vnl_math::ln10’ [-fpermissive]
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:89:24: 
error: ‘const double vnl_math::pi’ is not a static member of ‘class 
vnl_math’
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:89:14: 
error: uninitialized const ‘vnl_math::pi’ [-fpermissive]
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:90:24: 
error: ‘const double vnl_math::pi_over_2’ is not a static member of 
‘class vnl_math’
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:90:14: 
error: uninitialized const ‘vnl_math::pi_over_2’ [-fpermissive]
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:91:24: 
error: ‘const double vnl_math::pi_over_4’ is not a static member of 
‘class vnl_math’
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:91:14: 
error: uninitialized const ‘vnl_math::pi_over_4’ [-fpermissive]
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:92:24: 
error: ‘const double vnl_math::one_over_pi’ is not a static member of 
‘class vnl_math’
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:92:14: 
error: uninitialized const ‘vnl_math::one_over_pi’ [-fpermissive]
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:93:24: 
error: ‘const double vnl_math::two_over_pi’ is not a static member of 
‘class vnl_math’
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:93:14: 
error: uninitialized const ‘vnl_math::two_over_pi’ [-fpermissive]
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:94:24: 
error: ‘const double vnl_math::two_over_sqrtpi’ is not a static member 
of ‘class vnl_math’
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:94:14: 
error: uninitialized const ‘vnl_math::two_over_sqrtpi’ [-fpermissive]
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:95:24: 
error: ‘const double vnl_math::one_over_sqrt2pi’ is not a static member 
of ‘class vnl_math’
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:95:14: 
error: uninitialized const ‘vnl_math::one_over_sqrt2pi’ [-fpermissive]
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:96:24: 
error: ‘const double vnl_math::sqrt2’ is not a static member of ‘class 
vnl_math’
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:96:14: 
error: uninitialized const ‘vnl_math::sqrt2’ [-fpermissive]
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:97:24: 
error: ‘const double vnl_math::sqrt1_2’ is not a static member of ‘class 
vnl_math’
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:97:14: 
error: uninitialized const ‘vnl_math::sqrt1_2’ [-fpermissive]
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:98:24: 
error: ‘const double vnl_math::euler’ is not a static member of ‘class 
vnl_math’
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:98:14: 
error: uninitialized const ‘vnl_math::euler’ [-fpermissive]
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:101:24: 
error: ‘const double vnl_math::eps’ is not a static member of ‘class 
vnl_math’
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:101:14: 
error: uninitialized const ‘vnl_math::eps’ [-fpermissive]
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:102:24: 
error: ‘const double vnl_math::sqrteps’ is not a static member of ‘class 
vnl_math’
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:102:14: 
error: uninitialized const ‘vnl_math::sqrteps’ [-fpermissive]
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:105:23: 
error: ‘const float vnl_math::float_eps’ is not a static member of 
‘class vnl_math’
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:105:13: 
error: uninitialized const ‘vnl_math::float_eps’ [-fpermissive]
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:106:23: 
error: ‘const float vnl_math::float_sqrteps’ is not a static member of 
‘class vnl_math’
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:106:13: 
error: uninitialized const ‘vnl_math::float_sqrteps’ [-fpermissive]
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx: 
In static member function ‘static double vnl_math::angle_0_to_2pi(double)’:
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:291:16: 
error: ‘pi’ is not a member of ‘vnl_math’
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:292:28: 
error: ‘pi’ is not a member of ‘vnl_math’
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:294:12: 
error: ‘pi’ is not a member of ‘vnl_math’
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:294:47: 
error: ‘pi’ is not a member of ‘vnl_math’
/home/ajg23/DEVEL/src/ITK/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_math.cxx:304:21: 
error: ‘pi’ is not a member of ‘vnl_math’
make[2]: *** 
[Modules/ThirdParty/VNL/src/vxl/core/vnl/CMakeFiles/itkvnl.dir/vnl_math.cxx.o] 
Error 1
make[2]: *** Waiting for unfinished jobs....