powerpc64 system-clang-8 based context: x11-toolkits/qt5-declarative fails to build in poudriere: /usr/local/lib/qt5/bin/qlalr segmentation faults in std::type_info::~type_info() () from /usr/local/lib/gcc8/libstdc++.so.6

[Mark Linimon]

On Thu, May 23, 2019 at 10:33:35PM -0700, Mark Millard via freebsd-toolchain wrote:
> That is no matter what the system compiler is for powerpc64.
> 
> This lead to the below mixing of libstdc++.so.6 and libc++/libcxxrt . . .

Yeah.  This is probably my fault.

We've baked the assumption into ports that "powerpc64 implies gcc in base".
You're the first person to color outside the lines I think :-)

I'm going to start an internal discussion about what the "real" fix is.
I consider what we've done in some places to not be the "real" fix because
they assume _either_ llvm _or_ gcc in base.  This would fix your specific
problem but not the general problem of someone installing both and then
switching back and forth for testing.

mcl