Reduce mypy/c package size, using -g0 CFLAG

[erny]

Thanks for this great piece of software!

The problem: I use install mypy in docker images so the distribution includes full testing capabilities. When I install from pypi, I get complete mypy with mypyc in my x86_64 docker image (based on python-slim / debian based images)

For mypy-0.820+dev the wheel for CPython 3.8 is currently about 29MB, and uncompressed about 109MB in Linux x86_64.

Adding the -g0 compile flag (excluding debug info from binaries) in build.py, the wheel size is reduced to 11MB and uncompressed to 37MB.

So it would be cool to have a debug flag or anything to control an optional -g0 compiler flag (or the corresponding Darwin / Windows CFLAGS).

Thanks.

[JukkaL]

This sounds reasonable. We don't really need the debug information for anything, I think.

[ichard26]

As far as I can tell, while the mypycify entrypoint now supports a debug_level keyword argument, mypy's wheel build set up doesn't override the default of 1. Probably worth doing that? cc @hauntsaninja