875578 – flag-o-matic.eclass: strip-unsupported-flags tests flags one at a time, which fails with flags that depend on other flags

Bug 875578 - flag-o-matic.eclass: strip-unsupported-flags tests flags one at a time, which fails with flags that depend on other flags

Summary: flag-o-matic.eclass: strip-unsupported-flags tests flags one at a time, which...

Status:	UNCONFIRMED

Alias:	None

Product:	Gentoo Linux
Classification:	Unclassified
Component:	Eclasses (show other bugs)
Hardware:	All Linux

Importance:	Normal normal with 1 vote (vote)
Assignee:	Gentoo Toolchain Maintainers

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Reported:	2022-10-06 08:27 UTC by marios4
Modified:	2022-10-19 17:56 UTC (History)
CC List:	1 user (show)

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Runtime testing required:	---

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Description marios4 2022-10-06 08:27:57 UTC

When a flags requires another flag (for example clang -fwhole-program-vtables requires -flto) it gets stripped even if the requirement is met. This happens because each flag is tested independently. Maybe the easiest way to fix it is by patching the compiler to just ignore those flags when the requirement is not met (or emit a warning instead of an error).