This still affects InsightToolkit 4.8.1 in Xenial Xerus 16.04. It looks
like the issue will be fixed in 4.9, for which rc3 is already out.
In 16.04, compiling with C++11 still gives:
/usr/include/ITK-4.8/vnl/vnl_numeric_traits.h:437:35: error: ‘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);
^
It has been fixed upstream on November 11, 2015:
http://review.source.kitware.com/#/c/20386/ and it looks like the fix is
in 4.9 RC1 according to the change log at
http://www.kitware.com/blog/home/post/1012.
To maintainers: it looks like 4.9 will be out soon (planned release was
earlier this month). Will we have 4.9.0 in Ubuntu 16.04 or do you prefer
backporting the patch at http://review.source.kitware.com/#/c/20386/ to
ITK 4.8.1?
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https://bugs.launchpad.net/bugs/1270148
Title:
Building in C++11 mode causes compilation errors
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