Gentoo Websites Logo
Go to: Gentoo Home Documentation Forums Lists Bugs Planet Store Wiki Get Gentoo!
Bug 855248 - dev-db/pgpool2-4.4.5 fails to compile (lto): palloc.h:79:14: error: type of palloc does not match original declaration [-Werror=lto-type-mismatch]
Summary: dev-db/pgpool2-4.4.5 fails to compile (lto): palloc.h:79:14: error: type of p...
Status: RESOLVED FIXED
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: Current packages (show other bugs)
Hardware: All Linux
: Normal normal (vote)
Assignee: PgSQL Bugs
URL:
Whiteboard:
Keywords:
Depends on:
Blocks: lto
  Show dependency tree
 
Reported: 2022-06-30 06:05 UTC by Agostino Sarubbo
Modified: 2024-03-11 14:23 UTC (History)
1 user (show)

See Also:
Package list:
Runtime testing required: ---


Attachments
build.log (build.log,156.25 KB, text/plain)
2022-06-30 06:05 UTC, Agostino Sarubbo
Details

Note You need to log in before you can comment on or make changes to this bug.
Description Agostino Sarubbo gentoo-dev 2022-06-30 06:05:45 UTC
https://blogs.gentoo.org/ago/2020/07/04/gentoo-tinderbox/

Issue: dev-db/pgpool2-4.3.2 fails to compile (lto).
Discovered on: amd64 (internal ref: lto_tinderbox)

NOTE:
This machine uses lto with CFLAGS=-flto -Werror=odr -Werror=lto-type-mismatch -Werror=strict-aliasing
Comment 1 Agostino Sarubbo gentoo-dev 2022-06-30 06:05:48 UTC
Created attachment 788855 [details]
build.log

build log and emerge --info
Comment 2 Agostino Sarubbo gentoo-dev 2022-07-26 09:00:39 UTC
Here is a bit of explanation:

-Werror=lto-type-mismatch:
User to find possible runtime issues in packages. It likely means the package is unsafe to build & use with LTO.
For projects using the same identifier but with different types across different files, they must be fixed to be consistent across the codebase.

-Werror=odr:
Used to find possible runtime issues in packages. These bugs are a problem anyway but may be even worse when combined with LTO. C++ code must comply with the One Definition Rule (ODR) - see https://en.cppreference.com/w/cpp/language/definition#One_Definition_Rule.

-Werror=strict-aliasing:
Used to find possible runtime issues in packages. These bugs are a problem anyway but may be even worse when combined with LTO.

Workarounds:
- If upstream is friendly and still active, file a bug upstream. For emulators, codecs, games, or multimedia packages, it may be worth just applying a workaround instead, as upstreams sometimes aren't receptive to these bugs (VALID FOR ALL).
- Use the new 'filter-lto' from flag-o-matic.eclass as it's likely to be unsafe with LTO (VALID FOR lto-type-mismatch - odr).
- Fix it yourself if interested, of course (VALID FOR ALL).
- Append-flags -fno-strict-aliasing (VALID FOR strict-aliasing).
- Use memcpy() but a union is sometimes suitable too (VALID FOR strict-aliasing).
- -fstrict-aliasing is implied by -O2, so this must be addressed in some form (VALID FOR strict-aliasing).

See also: https://marc.info/?l=gentoo-dev&m=165639574126280&w=2
Comment 3 Agostino Sarubbo gentoo-dev 2024-02-15 18:55:56 UTC
lto_tinderbox has reproduced this issue with version 4.4.5 - Updating summary.
Comment 4 Larry the Git Cow gentoo-dev 2024-03-11 14:23:59 UTC
The bug has been closed via the following commit(s):

https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=1a1fa73a130e911354c9578f4e5e905ef00281a1

commit 1a1fa73a130e911354c9578f4e5e905ef00281a1
Author:     Eli Schwartz <eschwartz93@gmail.com>
AuthorDate: 2024-03-10 23:41:32 +0000
Commit:     Sam James <sam@gentoo.org>
CommitDate: 2024-03-11 14:22:46 +0000

    dev-db/pgpool2: mark as LTO-unsafe
    
    Closes: https://bugs.gentoo.org/855248
    Signed-off-by: Eli Schwartz <eschwartz93@gmail.com>
    Signed-off-by: Sam James <sam@gentoo.org>

 dev-db/pgpool2/pgpool2-4.3.8.ebuild | 10 ++++++++--
 dev-db/pgpool2/pgpool2-4.4.4.ebuild | 10 ++++++++--
 dev-db/pgpool2/pgpool2-4.4.5.ebuild | 10 ++++++++--
 dev-db/pgpool2/pgpool2-9999.ebuild  | 10 ++++++++--
 4 files changed, 32 insertions(+), 8 deletions(-)