Re: [PATCH] compiler-gcc: get back Clang build
From: Nick Desaulniers
Date: Tue Aug 21 2018 - 12:35:46 EST
On Tue, Aug 21, 2018 at 3:39 AM Joe Perches <joe@xxxxxxxxxxx> wrote:
> On Tue, 2018-08-21 at 15:48 +0900, Masahiro Yamada wrote:
> > Commit cafa0010cd51 ("Raise the minimum required gcc version to 4.6")
> > missed the fact that <linux/compiler-gcc.h> is included by Clang
> > as well as by GCC.
> > Clang actually defines __GNUC__, __GNUC_MINOR__, __GNUC_PATCHLEVEL__
> > and it looks like GCC 4.2.1.
> > $ scripts/gcc-version.sh -p clang
> > 040201
> Perhaps this would work, but I can't test it as
> my clang version doesn't otherwise build a defconfig
> and errors out with
> $ make CC=clang
> arch/x86/Makefile:179: *** Compiler lacks asm-goto support.. Stop.
Sorry, we're working on implementing this in clang and llvm for x86.
I recently reviewed the design doc, and am trying to see how I can
actively help push this along. It's not a small/quick change to llvm,
but we're working on it.