Re: [PATCH RFC] gcc-plugins: Handle GCC version mismatch for OOT modules

Josh Poimboeuf
2021-03-04T00:52:17Z

On Wed, Mar 03, 2021 at 12:56:52PM -0800, Linus Torvalds wrote:
> On Wed, Mar 3, 2021 at 12:24 PM Josh Poimboeuf <jpoimboe@redhat.com> wrote:
> >
> > Your nack is for a different reason: GCC plugins are second-class
> > citizens. Fair enough...
>
> MNo, I didn't NAK it. Quite the reverser.
>
> I am ABSOLUTELY against rebuilding normal object files just because
> gcc versions change. A compiler version change makes zero difference
> for any normal object file.
>
> But the gcc plugins are different. They very much _are_ tied to a
> particular gcc version.
>
> Now, they are tied to a particular gcc version because they are
> horribly badly done, and bad technology, and I went off on a bit of a
> rant about just how bad they are, but the point is that gcc plugins
> depend on the exact gcc version in ways that normal object files do
> _not_.

Thanks, reading comprehension is hard. I realized after re-reading that
I interpreted your "plugins should depend on the kernel version"
statement too broadly.

Masahiro, any idea how I can make the GCC version a build dependency?

--
Josh