py37-scipy @1.4.1: Build failure on Tiger PPC

[SerpentChris (Chris Calderon)]

OS version is 10.4.11. Not really sure what causes the build issue, though I noticed some of the errors mention //usr/include/c++/4.0.0/cxxabi.h

[kencu (Ken)]

The c++ bits are building with gcc-4.2, but this software requires a c++11 compiler. Will see how to fix this.

[kencu (Ken)]

Setting compiler.cxx_standard 2011 in the Portfile seems to work to configure it to use gcc7 for the c++ compiler. It still uses gcc6 for the fortran compiler as I guess that is in the compilers-1.0 PortGroup. Building now. Will report back success or failure once done.

[kencu (Ken)]

Fails. Lots of ugly-looking errors. At one point throws in a -mmacosx-version-min=10.9 during a build on 10.4, so seriously hosed build.

The final linker error that kills it is:

ld: symbol dyld_stub_binding_helper not defined

so it's a real mess. Log attached.

[michaelld (Michael Dickens)]

This might be fixed in [d07e7d5de26d0a16ddd5f9b5b2b30f767ed74f89/macports-ports] ... forcing C++11, C11, and thread_local storage ... please update and see if this works for you.

[ryandesign (Ryan Carsten Schmidt)]

I would guess that that would not help, since python does not support modules written in C++, so any specifications MacPorts may make about what C++ compiler or CXXFLAGS should be used will be ignored. See ​https://github.com/pypa/setuptools/issues/1732, ​https://github.com/pypa/setuptools/issues/1192, ​https://bugs.python.org/issue1222585.