Messages in this thread |  | | Date | Wed, 30 Sep 2020 18:58:48 -0500 | From | Segher Boessenkool <> | Subject | Re: [PATCH v4 04/17] x86/acrn: Introduce hypercall interfaces |
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On Wed, Sep 30, 2020 at 09:42:40PM +0200, Peter Zijlstra wrote: > > Looks like yes. You can even check different GCC versions via the > > dropdown in the top right. > > That only tells me it compiles it, not if that (IMO) weird construct is > actually guaranteed to work as expected. > > I'd almost dive into the GCC archives to read the back-story to this > 'feature', it just seems to weird to me. A well, for another day that.
It was documented in 1996 (<https://gcc.gnu.org/g:c1f7febfcb10>), the feature is older than that though.
In 2004 (in <https://gcc.gnu.org/g:805c33df1366>) the documentation for this was made more explicit (it has been rewritten since, but it still says the same thing).
Segher
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