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@xxxxxxxxxx/
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.
...
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
