Bug 912280

Summary:	dev-cpp/abseil-cpp: incorrectly packaged absl/base/options.h creates ABI confusion for updates
Product:	Gentoo Linux	Reporter:	Holger Hoffstätte <holger>
Component:	Current packages	Assignee:	Georgy Yakovlev <gyakovlev>
Status:	RESOLVED FIXED
Severity:	normal	Keywords:	PullRequest
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
See Also:	https://github.com/gentoo/gentoo/pull/32281 https://bugs.gentoo.org/show_bug.cgi?id=912281
Whiteboard:
Package list:		Runtime testing required:	---
Bug Depends on:
Bug Blocks:	912819

Description Holger Hoffstätte 2023-08-14 16:15:18 UTC

This is a meta-issue to track the revelations in the attached PR, but the gist
is that our abseil-cpp installation has installed absl/base/options.h with default settings for various types, which means that any use of abseil has randomly selected ABI depending on the context of compilatoin/use.
With 2023xxyy this has changed and therefore now creates ABI breakage, primarily for users of re2, which has started to pull in abseil.

Reproducible: Always

Steps to Reproduce:
- install abseil-cpp-20220601
- grep "^#define.*STD_" /usr/include/absl/base/options.h
- 2 means compile-time delegation of various classes


Expected Results:  
All consumers of abseil should be forced to C++17 and delegate to the C++17 std:: classes, as that is the default since abseil-2023xxyy.

Comment 1 Holger Hoffstätte 2023-08-21 20:35:10 UTC

Fixed with https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=dc9def88168bb1d982c9f3eb6441468e4fdd7b37