Bug 926264 – dev-embedded/raspberrypi-utils-0_p20240203 fails to compile with LTO

• Status: RESOLVED FIXED
• Product: Gentoo Linux

[Description Jakub Bidžan 2024-03-06 12:52:57 UTC]

Created attachment 886805 [details]
emerge --info and build log of raspberrypi-utils

This package fails to compile on a raspberry pi 5 (Cortex-A76 CPU). Attaching complete build-log and emerge --info

[Comment 1 Sam James 2024-03-06 12:54:21 UTC]

Please try without LTO.

[Comment 2 Jakub Bidžan 2024-03-06 13:03:51 UTC]

I did try with only -O2 and -pipe and got same reult(In reply to Sam James from comment #1)
> Please try without LTO.

tried with only -O2 and -pipe and got the same result

[Comment 3 James Le Cuirot 2024-03-09 15:36:19 UTC]

(In reply to Jakub Bidžan from comment #2)
> tried with only -O2 and -pipe and got the same result

Really? I only get this when I use -flto.

[Comment 4 Sam James 2024-03-09 17:19:36 UTC]

(In reply to Jakub Bidžan from comment #2)
> I did try with only -O2 and -pipe and got same reult(In reply to Sam James
> from comment #1)
> > Please try without LTO.
> 
> tried with only -O2 and -pipe and got the same result

In general, you should give the log for the most simple build failure.

[Comment 5 James Le Cuirot 2024-03-09 21:33:04 UTC]

I've had a look, but I don't know how to deal with this one. Seems like an odd case. Maybe someone with more LTO experience will have a better idea.

[Comment 6 Andrii Batyiev 2024-03-31 01:38:56 UTC]

Created attachment 889082 [details, diff]
proposed fix

I've made a fix and created an issue in upstream tracker: https://github.com/raspberrypi/utils/issues/75
The problem is that LTO aggressively removes sections from object files.

[Comment 7 Eli Schwartz 2024-09-09 20:35:28 UTC]

The suggested fix was merge in April, but the snapshot we package is from February.

Chewi, is it possible to update the snapshot and check whether the update fixes the problem?

(I would check myself but all I have is amd64 hardware.)

[Comment 8 Larry the Git Cow 2024-09-09 21:14:16 UTC]

The bug has been referenced in the following commit(s):

https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=70f8c529e4a0639786ebcaec3dc15a6a18e94eb0

commit 70f8c529e4a0639786ebcaec3dc15a6a18e94eb0
Author:     James Le Cuirot <[e-mail]>
AuthorDate: 2024-09-09 21:09:41 +0000
Commit:     James Le Cuirot <[e-mail]>
CommitDate: 2024-09-09 21:14:06 +0000

    dev-embedded/raspberrypi-utils: Bump snapshot to 20240903
    
    Fixes LTO issue.
    
    Bug: https://bugs.gentoo.org/926264
    Signed-off-by: James Le Cuirot <[e-mail]>

 dev-embedded/raspberrypi-utils/Manifest            |  1 +
 .../raspberrypi-utils-0_p20240903.ebuild           | 47 ++++++++++++++++++++++
 2 files changed, 48 insertions(+)

[Comment 9 James Le Cuirot 2024-09-09 21:15:00 UTC]

Yep, looks good, thanks.

P.S. You can actually build this on amd64. ;)

[Comment 10 Eli Schwartz 2024-10-14 04:46:42 UTC]

Are we good to close this? (Were you waiting to stabilize the new version, or... ?)

[Comment 11 Larry the Git Cow 2024-10-19 21:45:08 UTC]

The bug has been closed via the following commit(s):

https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=643f24ce7de9d74b391b66f469b15dbdbf11b515

commit 643f24ce7de9d74b391b66f469b15dbdbf11b515
Author:     James Le Cuirot <[e-mail]>
AuthorDate: 2024-10-19 21:44:25 +0000
Commit:     James Le Cuirot <[e-mail]>
CommitDate: 2024-10-19 21:44:25 +0000

    dev-embedded/raspberrypi-utils: Drop old 0_p20240203
    
    Closes: https://bugs.gentoo.org/926264
    Signed-off-by: James Le Cuirot <[e-mail]>

 dev-embedded/raspberrypi-utils/Manifest            |  1 -
 .../raspberrypi-utils-0_p20240203.ebuild           | 48 ----------------------
 2 files changed, 49 deletions(-)