Re: [PATCH v2 01/39] kbuild: Fix clang build

[Fangrui Song]

On 2022-03-01, Kees Cook wrote:
> On Tue, Mar 01, 2022 at 01:16:04PM -0800, Nick Desaulniers wrote:
> > Also, Kees mentions this is an issue for testing multiple different
> > versions of gcc, too.  There perhaps is a way to simplify the builds
> > for BOTH toolchains; i.e. a yet-to-be-created shared variable denoting
> > the suffix for binaries?  The primary pain point seems to be Debian's
> > suffixing scheme; it will suffix GCC, clang, and lld, but not GNU
> > binutils IIUC.
>
> Right. Though I think auto-detection still makes sense.
>
> If I do:
>
> 	make CC=clang-12 LLVM=1
>
> it'd be nice if it also used ld.lld-12.

This transformation may be a bit magical.

On Debian, /usr/bin/clang-13 is a symlink to /usr/lib/llvm-13/bin/clang .
Will it be fine for the user to provide correct feasible PATH?

> > [...]
> > Just curious, what prefixes have you observed in the wild?
>
> For me, where ever I built clang, and "/usr/bin"
>
> --
> Kees Cook