wxWidgets-3.0: error: unknown type name 'nullptr_t'; did you mean 'std::nullptr_t'?

[ryandesign (Ryan Carsten Schmidt)]

xchm is failing to build at least on ​10.10 and ​10.11. It looks like the problem is in wxWidgets-3.0:

In file included from chmsearchpanel.cpp:21:
In file included from ./chmhtmlnotebook.h:25:
In file included from /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxWidgets/3.0/include/wx-3.0/wx/aui/auibook.h:24:
In file included from /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxWidgets/3.0/include/wx-3.0/wx/aui/tabart.h:23:
In file included from /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxWidgets/3.0/include/wx-3.0/wx/colour.h:15:
In file included from /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxWidgets/3.0/include/wx-3.0/wx/gdiobj.h:14:
In file included from /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxWidgets/3.0/include/wx-3.0/wx/object.h:19:
In file included from /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxWidgets/3.0/include/wx-3.0/wx/memory.h:15:
In file included from /opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxWidgets/3.0/include/wx-3.0/wx/string.h:46:
/opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxWidgets/3.0/include/wx-3.0/wx/strvararg.h:442:27: error: unknown type name 'nullptr_t'; did you mean 'std::nullptr_t'?
wxFORMAT_STRING_SPECIFIER(nullptr_t, wxFormatString::Arg_Pointer)
                          ^~~~~~~~~
                          std::nullptr_t
/opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxWidgets/3.0/include/wx-3.0/wx/strvararg.h:396:47: note: expanded from macro 'wxFORMAT_STRING_SPECIFIER'
    template<> struct wxFormatStringSpecifier<T>                            \
                                              ^
/Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/cstddef:97:31: note: 'std::nullptr_t' declared here
    typedef decltype(nullptr) nullptr_t;
                              ^

[jmroot (Joshua Root)]

The fix is probably to patch it to #include <cstddef> if it doesn't already, and change nullptr_t to std::nullptr_t. It may be including stddef.h to try to get nullptr_t in the global namespace, but some Xcode versions don't implement that correctly (and doing it is deprecated anyway).

[ryandesign (Ryan Carsten Schmidt)]

hugin-app is failing to build on 10.8 ​for the same reason. Mojca, any news on a fix for this, perhaps like Josh proposed above?

[ryandesign (Ryan Carsten Schmidt)]

wxMaxima is failing to build on 10.11 and earlier ​for the same reason.

[reneeotten (Renee Otten)]

I haven't tried to, but from a quick glance it looks like this might have been fixed in the latest version (v3.0.5.1) - so perhaps updating wxWidgets-3.0 would be the way forward?

[mojca (Mojca Miklavec)]

After both wxWidgets (3.0.5.1) and xchm (1.32) have been upgraded, I don't seem to be able to reproduce the problem. I hope this means that the problem is fixed?

I'm closing the ticket, but please reopen if you are still experiencing any issues.

Maybe wxPython is still affected. If so, please let me know.

[jmroot (Joshua Root)]

Indeed, hugin-app and xchm builds have succeeded on 10.11 now, though wxMaxima still fails for other reasons.