RE: [PATCH] compiler/gcc: Raise minimum GCC version for kernel builds to 4.8
From: Brian Cain
Date: Tue May 26 2020 - 17:57:14 EST
> -----Original Message-----
> From: linux-hexagon-owner@xxxxxxxxxxxxxxx <linux-hexagon-
> owner@xxxxxxxxxxxxxxx> On Behalf Of Nick Desaulniers
> On Tue, May 26, 2020 at 8:30 AM Guenter Roeck <linux@xxxxxxxxxxxx> wrote:
> > On Mon, May 11, 2020 at 09:41:37PM +0100, Will Deacon wrote:
> > > It is very rare to see versions of GCC prior to 4.8 being used to
> > > build the mainline kernel. These old compilers are also known to
> > > have codegen issues which can lead to silent miscompilation:
> > >
> > > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58145
> > >
> > > Raise the minimum GCC version to 4.8 for building the kernel and
> > > remove some tautological Kconfig dependencies as a consequence.
> > My hexagon compiler is v4.6.1, and I have been unable to find a more
> > recent version. Does anyone happen to have a pointer to a hexagon
> > toolchain with gcc 4.8 or later ?
> IIUC, hexagon moved to LLVM, though that target still has issues building the
Indeed, we did move to llvm. The build works with the clang_rt-builtins lib. But that issue indicates that it's an unnecessary wart to require that. From what I understand, other arches contribute these builtins content to the kernel build, so we'll do the same.
I'll prioritize this update.