Messages in this thread | | | Date | Thu, 3 Nov 2022 08:22:44 +0100 | Subject | Re: [RFC PATCH] kbuild: pass objects instead of archives to linker | From | Jiri Slaby <> |
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On 02. 11. 22, 10:44, Masahiro Yamada wrote: > Jiri Slaby reported that the (not-upstreamed) GCC-LTO tree got broken > due to 321648455061 ("kbuild: use obj-y instead extra-y for objects > placed at the head") > > https://lore.kernel.org/linux-kbuild/ea468b86-abb7-bb2b-1e0a-4c8959d23f1c@kernel.org/ > > > I am not pretty sure because I did not check the downstream code. > > > If I understood his report correctly, the reason for the breakage is > because I put all objects into the thin archive, expecting > the linker would preserve the object order in the archive. > > By specifying the object order directly in the command line, > GCC-LTO should get back working again.
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> I think my patch is unneeded (hence RFC), but I just wanted to know > if linkers (gnu ld and lld) see any difference.
Yes, including your patch (instead of vmlinux.S and /compressed/* changes) also fixes the issue. So the linker (gcc-ld) indeed respects command line, but not order of objects in .a.
thanks, -- js suse labs
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