https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95928
--- Comment #13 from H.J. Lu ---
(In reply to Andi Kleen from comment #12)
> Okay. I only compared gcc-7 (working) vs gcc-9 (broken), but always with LTO.
>
> Looking at the kernel link it also uses --whole-archive. Perhaps that makes
> a differ
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95928
--- Comment #12 from Andi Kleen ---
Okay. I only compared gcc-7 (working) vs gcc-9 (broken), but always with LTO.
Looking at the kernel link it also uses --whole-archive. Perhaps that makes a
difference?
I'll redo the test case with --whole-arc
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95928
--- Comment #11 from H.J. Lu ---
(In reply to Andi Kleen from comment #9)
> I think the STB_SECONDARY stuff is only needed if ld -r is used, but not for
> ar
Linker won't search archive to resolve weak definition. Since SECONDARY is
between WEAK
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95928
--- Comment #10 from H.J. Lu ---
(In reply to Andi Kleen from comment #8)
> It works fine without LTO.
>
> Otherwise the Linux kernel wouldn't work. It relies on this behavior for its
> syscalls.
>
[hjl@gnu-cfl-2 pr95928]$ make
/usr/gcc-9.3.1-
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95928
--- Comment #9 from Andi Kleen ---
I think the STB_SECONDARY stuff is only needed if ld -r is used, but not for ar
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95928
--- Comment #8 from Andi Kleen ---
It works fine without LTO.
Otherwise the Linux kernel wouldn't work. It relies on this behavior for its
syscalls.
The test case is extracted from there.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95928
--- Comment #7 from H.J. Lu ---
(In reply to H.J. Lu from comment #6)
> It has nothing to do with LTO. You get the same behavior without LTO.
> This is how weak symbol works.
BTW, this is why I proposed STB_SECONDARY:
https://gcc.gnu.org/legac
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95928
H.J. Lu changed:
What|Removed |Added
CC||hjl.tools at gmail dot com
--- Comment #6 from
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95928
--- Comment #5 from Andi Kleen ---
It doesn't seem to be the plugin itself, I compiled trunk with the gcc-7
lto-plugin.c and it fails too.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95928
--- Comment #4 from Andi Kleen ---
Reproduced on trunk too
11.0-200626 e74c281bf4955eea7fdc5f21b43e29fa0235a5b0
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95928
--- Comment #3 from Andi Kleen ---
Versions reproduced:
gcc version 10.1.1 20200507 [revision dd38686d9c810cecbaa80bb82ed91caaa58ad635]
(SUSE Linux)
gcc-9 (SUSE Linux) 9.3.1 20200406 [revision
6db837a5288ee3ca5ec504fbd5a765817e556ac2]
Versio
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95928
--- Comment #1 from Andi Kleen ---
Created attachment 48792
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48792&action=edit
sys_ni.i
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95928
--- Comment #2 from Andi Kleen ---
Created attachment 48793
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=48793&action=edit
capability.i
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