[Bug bootstrap/79771] [7 Regression] in-tree zlib breaks build

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79771

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
There is
https://github.com/madler/zlib/commit/b4ce6caf0992296230e4e25b22a63e418bdf4dcf
but not enough further info why it has changed.  So, report upstream?