Need to specify extra_link

Need to specify extra_link_args to compile

Hi, just wanted to mention that I needed to add extra_link_args=["-stdlib=libc++"] inside ext_modules = cythonize(Extension( ... )) to get the cython code to compile. I'm using Python 3.7 on Mojave 10.14.4 with...

$ gcc --version

Configured with: --prefix=/Library/Developer/CommandLineTools/usr --with-gxx-include-dir=/Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/usr/include/c++/4.2.1
Apple LLVM version 10.0.1 (clang-1001.0.46.3)
Target: x86_64-apple-darwin18.5.0
Thread model: posix
InstalledDir: /Library/Developer/CommandLineTools/usr/bin

Getting these things to compile is always tricky for me. Let me know if you want more info.