FYI, (I guess we know already :)
----- Forwarded message from "Theodore Y. Ts'o" <ty...@mit.edu> ----- Date: Sun, 28 Jul 2019 19:44:34 -0400 From: "Theodore Y. Ts'o" <ty...@mit.edu> To: Steffen Möller <steffen_moel...@gmx.de> Cc: debian-de...@lists.debian.org Subject: Re: And in 2019? Re: -flto to become more of a routine - any change in opinion since 2011? Message-ID: <20190728234434.ga4...@mit.edu> List-Id: <debian-devel.lists.debian.org> On Wed, Jul 24, 2019 at 06:03:21PM +0200, Steffen Möller wrote: > Hello, > > We just had SuSE embracing LTO > (https://www.linuxtoday.com/infrastructure/opensuse-enables-lto-by-default-for-tumbleweed-smaller-faster-binaries.html). > I am not sure about the progress on issues summarised in > http://blog.regehr.org/archives/1180 that Ian pointed to. But since I > last asked in 2016 we have more pedantic compiler settings and more CI - > and LTO, as much as compilers have improved on that, does not need to be > applied everywhere. Any change in opinion? I'm currently compiling e2fsprogs with LTO for Debian --- and I'm seriously considering ditching that change. The reason why is because LTO breaks reproducible builds, and so it makes it harder when I'm verifying whether a particular packaging change (say, moving to a new debhelper compat level) is going to make any changes to the binary --- because using LTO pretty much guarantees that it will. Yeah, the binaries are a little bit smaller, and presumably a little bit more CPU efficient, but 99% of the time, e2fsprogs binary are I/O bound, not CPU bound, and the fact that my package builds aren't reproducible is !@#?! annoying. - Ted ----- End forwarded message ----- -- tschau, Holger ------------------------------------------------------------------------------- holger@(debian|reproducible-builds|layer-acht).org PGP fingerprint: B8BF 5413 7B09 D35C F026 FE9D 091A B856 069A AA1C
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