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X-OriginatorOrg: siemens.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Jul 2022 18:53:08.2596 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: bc8093c2-8949-4560-165f-08da68259709 X-MS-Exchange-CrossTenant-Id: 38ae3bcd-9579-4fd4-adda-b42e1495d55a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=38ae3bcd-9579-4fd4-adda-b42e1495d55a;Ip=[194.138.21.73];Helo=[hybrid.siemens.com] X-MS-Exchange-CrossTenant-AuthSource: DB5EUR01FT010.eop-EUR01.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB6PR1001MB1288 X-TUID: j36iPu9avThp On 15.07.22 15:47, Baurzhan Ismagulov wrote: > Hello Felix, > > On Fri, Jul 15, 2022 at 01:27:27PM +0000, Moessbauer, Felix wrote: >> Please also have a look at the reproducibility section of dpkg-buildflags. >> The only reason the kernel is affected from this is, that the kbuild only uses KCFLAGS, not CFLAGS. >> At least the flags about reproducibility should be added to all kernel builds done via ISAR. > > IIUC, the non-reproducibility comes from the absolute paths in the debug info > -- we'll have a look, maybe those could be replaced with relative ones. > > I haven't deeply looked at reproducible packages, could you please elaborate on > the KCFLAGS vs. CFLAGS distinction mattering here? > https://www.kernel.org/doc/html/latest/kbuild/reproducible-builds.html may explain more. I just learned from Ben Hutchings that following this in our kernel recipe may not only resolve the absolute path topic but would also allow to drop slow dh_strip_nondeterminism from our builds. Jan -- Siemens AG, Technology Competence Center Embedded Linux