Previous investigations: #22645 #24028 b/211487922

Previous fix attempts: #23385 #28397

Why we need this hack?

• The gcc-regression-on-memcpy: https://www.win.tue.nl/~aeb/linux/misc/gcc-semibug.html

Why can't we remove the hack?

This will break binary packages built on glibc running on musl libc. Ruby is a prime suspect for this sort of breakage.

• Can't install using pip on ubuntu 19.04 #22645 (comment)

Why this is a problem again?

• Fix the setuptools distutils overriding issue #28393
• This is currently broke on head. setuptools replaced distutils implementation, and it is causing this linker error in some environments.

This issue is created to carry-on investigation about this topic.