On 12/10/18 3:56 AM, Florian Weimer wrote: > Downstream, we had a separate set of builds flags for certain packages > and used -O3 there, targeted at POWER (both ppc64 and ppc64le), for > increased use of vectorization presumably. > > I don't think this was ever upstreamed to Fedora (the downstream changes > were in the redhat-rpm-config package). I don't recall seeing a > corresponding Fedora change. As a result, the recent downstream rebase > lost support for this. > > Should Fedora package maintainers remove _performance_build support or > custom flag overrides for -O3 from their packages? > > My understanding is that Fedora build flag policy is set by the > redhat-rpm-config package, which currently specifies -O2 for all > architectures. Well, we have: https://fedoraproject.org/wiki/Packaging:Guidelines#Compiler_flags So, I would say anyone using those custom flags/overrides needs to document why in spec and in general shouldn't override or use custom flags. ;) kevin
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