openscad-devel @2018.04-1: error: use of undeclared identifier 'nullptr'

[kencu (Ken)]

On darwin11, build fails with above error.

adding

PortGroup cxx11 1.1

didn't fix it. Thereafter adding both these:

configure.cxxflags-append -std=c++11
configure.objcxxflags-append -std=c++11

didn't fix it either.

qt4 is a bit picky/tricky about these things. I may need to edit the build file directly and add -std=c++11 to the QMAKE OJCXX flags, unless there is an easier way.

It seems (in the log) that this build specifically disables c++11 earlier in the build configuration due to libstdc++ (I guess it doesn't see libc++, and/or doesn't know what macports-libstdc++ might be).

This built fine on 10.6.8 configured to libc++, amongst other systems, earlier this year. I have a feeling this may be another example of the type of fixes we will no longer have to do once we default to libc++ on all systems.