915689 – Collapse USE_EXPAND USE flags in --binpkg-respect-use warning

Bug 915689 - Collapse USE_EXPAND USE flags in --binpkg-respect-use warning

Summary: Collapse USE_EXPAND USE flags in --binpkg-respect-use warning

Status:	CONFIRMED

Alias:	None

Product:	Portage Development
Classification:	Unclassified
Component:	Core - Interface (emerge) (show other bugs)
Hardware:	All Linux

Importance:	Normal normal (vote)
Assignee:	Portage team

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Depends on:
Blocks:

Reported:	2023-10-13 15:25 UTC by Sam James
Modified:	2023-10-13 15:25 UTC (History)
CC List:	0 users

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Runtime testing required:	---

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Description Sam James archtester

2023-10-13 15:25:50 UTC

A user was a bit confused by this from their world upgrade:
```
[...]
!!! The following binary packages have been ignored due to non matching USE:

    =x11-libs/pixman-0.42.2 cpu_flags_x86_ssse3
    =x11-libs/pixman-0.42.2 -cpu_flags_x86_mmxext -cpu_flags_x86_sse2
    =dev-db/sqlite-3.42.0 -secure-delete
    =media-video/ffmpeg-6.0-r6 cpu_flags_x86_sse3 cpu_flags_x86_ssse3
    =media-video/ffmpeg-6.0-r6 -cpu_flags_x86_mmx -cpu_flags_x86_mmxext -cpu_flags_x86_sse -cpu_flags_x86_sse2
    =media-libs/libaom-3.6.1 cpu_flags_x86_sse3 cpu_flags_x86_ssse3
    =media-libs/libaom-3.6.1 -cpu_flags_x86_mmx -cpu_flags_x86_sse -cpu_flags_x86_sse2
    =dev-libs/botan-2.19.3-r2 cpu_flags_x86_ssse3
    =dev-libs/botan-2.19.3-r2 -cpu_flags_x86_sse2
```

We could collapse these into CPU_FLAGS_X86: ssse3 etc based on their USE_EXPAND definitions.