https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107496
Bug ID: 107496 Summary: [Feature request] Conditional attributes Product: gcc Version: 13.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: jwjagersma at gmail dot com Target Milestone: --- I'd like to request a new extension feature: the ability to enable or disable attributes based on a conditional expression. This could be implemented either via a sort of meta-attribute: template <bool A, bool B> [[gnu::conditional(A, always_inline), gnu::conditional(B, noinline)]] auto f() { /* ... */ } Or by reusing the template syntax: template <bool A, bool B> [[gnu::always_inline<A>, gnu::noinline<B>]] auto f() { /* ... */ } Although maybe the latter should only be allowed via the __attribute__ syntax, which is already a GNU extension. I did recently send in a small patch to allow selecting a string conditionally in the i386 'target' attribute (no responses yet though). I really need it for that particular case, and it would be nice if that could make it in gcc 13, if there are no objections. For the longer term though, I think being able to apply this to all attributes would be a very useful feature to have.