On Mon, Nov 14, 2016 at 6:36 PM, Matt McCormick <matt.mccorm...@kitware.com> wrote:
> On Mon, Nov 14, 2016 at 2:53 PM, Isaiah Norton <isaiah.nor...@gmail.com> > wrote: > > Hi Matt, > > > >> > >> Here are the tests: > >> http://review.source.kitware.com/#/c/21755/ > >> > >> where reasonable export specification is added in both ITK and the > >> client libraries. But, dynamic_cast fails on OSX: > > > We will test further with Python wrapping for OSX with the > ITKCommon_TEMPLATE_EXPORT approach, then investigate > -fvisibility-ms-compat if that does not prove viable. > To follow-up, after further investigation, we used the equivalent of ITKCommon_TEMPLATE_EXPORT but called it ITK_TEMPLATE_EXPORT so the same macro can be used across multiple modules. This macro is defined to __attribute__ ((visibility ("default"))) on OSX. As noted here [1], this is the same approach taken by libstdc++ for the templated STL containers: "Part of the std:: (exceptions typeinfo symbols) must be visible-by-default for proper throw-catch/dynamic_cast working across shared libs boundaries." This is available in ITK 4.11. Thanks, Matt [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=50348
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