https://blogs.gentoo.org/ago/2020/07/04/gentoo-tinderbox/ Issue: sys-libs/zlib-ng-2.1.2-r1 adds -Werror flag on its own (MUSL-SYSTEM). Discovered on: amd64 (internal ref: tinderbox_musl) NOTE: (MUSL-SYSTEM) in the summary means that bug was found on a machine that runs MUSL libc but this bug MAY or MAY NOT BE related to musl. -Werror is not recommended for releases and should always be disabled when encountered in build-logs, because there are numerous cases where this breaks without purpose. See also: https://devmanual.gentoo.org/ebuild-writing/common-mistakes/index.html.
Created attachment 864042 [details] build.log build log and emerge --info