Cannot build distribution-friendly wheels

[rossburton]

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Describe the bug

Since #1586 the default builds are "release" (-g0 -Ofast -NDEBUG -s) or "debug" (-g3 -Og ...).

However, all Linux distributions and probably others such as homebrew and macports, don't build like this at all.

The standard behaviour for Linux is to build with something along the lines of -g -O2 and then split the debug symbols into separate packages, so out of the box the binaries are optimised enough and debug symbols that mostly work are easily available.

The usual way we do this is by setting CFLAGS to the flags we want, and expecting packages to follow them. Whilst I respect your desire for the binary wheels you ship to be built in fully optimised, is there a way to opt out of this behaviour?

To Reproduce

Build yarl, expect debug symbols in the binary.

Expected behavior

Yarl will respect CFLAGS/LDFLAGS and not forcibly add its own flags.

Logs/tracebacks

N/A

Python Version

$ python --version

multidict Version

$ python -m pip show multidict

propcache Version

$ python -m pip show propcache

yarl Version

$ python -m pip show yarl

OS

Linux

Additional context

No response