[Bug target/69471] "-march=native" unintentionally breaks further -march/-mtune flags

[wavexx at thregr dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69471

--- Comment #4 from wavexx at thregr dot org ---
Since I couldn't find documentation for it either, doesn't
-march=haswell by itself imply all associated ISA features?

If so, why -march=native expands to all individual features explicitly?