On Mon, Mar 15, 2021 at 5:22 PM Masahiro Yamada <masahiroy@xxxxxxxxxx> wrote:
>
> On Wed, Mar 10, 2021 at 5:59 AM Nathan Chancellor <nathan@xxxxxxxxxx> wrote:
> >
> > This flag was originally added to allow clang to find the GNU cross
> > tools in commit 785f11aa595b ("kbuild: Add better clang cross build
> > support"). This flag was not enough to find the tools at times so
> > '--prefix' was added to the list in commit ef8c4ed9db80 ("kbuild: allow
> > to use GCC toolchain not in Clang search path") and improved upon in
> > commit ca9b31f6bb9c ("Makefile: Fix GCC_TOOLCHAIN_DIR prefix for Clang
> > cross compilation"). Now that '--prefix' specifies a full path and
> > prefix, '--gcc-toolchain' serves no purpose because the kernel builds
> > with '-nostdinc' and '-nostdlib'.
> >
> > This has been verified with self compiled LLVM 10.0.1 and LLVM 13.0.0 as
> > well as a distribution version of LLVM 11.1.0 without binutils in the
> > LLVM toolchain locations.
> >
> > Link: https://reviews.llvm.org/D97902
> > Signed-off-by: Nathan Chancellor <nathan@xxxxxxxxxx>
> > ---
> >
> > v1 -> v2:
> >
> > * Improve commit message (add history behind flag and link to Fangrui's
> > documentation improvement).
>
>
> Both applied to linux-kbuild. Thanks.
>
Sorry for being pedantic: This misses my Tested-by#s (see [1]).
Tested-by: Sedat Dilek <sedat.dilek@xxxxxxxxx> # LLVM/Clang v13-git
AFAICS v2 changes some comments in the commit only but not code?
- Sedat -
[1] https://marc.info/?l=linux-kernel&m=161480031518629&w=2
[2] https://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild.git/commit/?h=kbuild&id=d4aa405bc9cd506532f075456645716cdd1739c1
>
>
>
>
> > I did not carry tags forward so that people could re-review and test.
> >
> > Makefile | 4 ----
> > 1 file changed, 4 deletions(-)
> >
> > diff --git a/Makefile b/Makefile
> > index 31dcdb3d61fa..182e93d91198 100644
> > --- a/Makefile
> > +++ b/Makefile
> > @@ -568,10 +568,6 @@ ifneq ($(CROSS_COMPILE),)
> > CLANG_FLAGS += --target=$(notdir $(CROSS_COMPILE:%-=%))
> > GCC_TOOLCHAIN_DIR := $(dir $(shell which $(CROSS_COMPILE)elfedit))
> > CLANG_FLAGS += --prefix=$(GCC_TOOLCHAIN_DIR)$(notdir $(CROSS_COMPILE))
> > -GCC_TOOLCHAIN := $(realpath $(GCC_TOOLCHAIN_DIR)/..)
> > -endif
> > -ifneq ($(GCC_TOOLCHAIN),)
> > -CLANG_FLAGS += --gcc-toolchain=$(GCC_TOOLCHAIN)
> > endif
> > ifneq ($(LLVM_IAS),1)
> > CLANG_FLAGS += -no-integrated-as
> >
> > base-commit: a38fd8748464831584a19438cbb3082b5a2dab15
> > --
> > 2.31.0.rc1
> >
>
>
> --
> Best Regards
> Masahiro Yamada
