On Mon, Apr 06, 2020 at 12:35:35PM +0200, Sedat Dilek wrote: > On Sun, Apr 5, 2020 at 3:56 PM Masahiro Yamada <masahiroy@xxxxxxxxxx> wrote: > > > > On Sun, Apr 5, 2020 at 8:23 PM Sedat Dilek <sedat.dilek@xxxxxxxxx> wrote: > > > > > > On Thu, Apr 2, 2020 at 4:24 PM Sedat Dilek <sedat.dilek@xxxxxxxxx> wrote: > > > > > > > > On Thu, Apr 2, 2020 at 10:18 AM Kees Cook <keescook@xxxxxxxxxxxx> wrote: > > > > > > > > > > When doing Clang builds of the kernel, it is possible to link with > > > > > either ld.bfd (binutils) or ld.lld (LLVM), but it is not possible to > > > > > discover this from a running kernel. Add the "$LD -v" output to > > > > > /proc/version. > > > > > > > > > > Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx> > > > > > > > > > > Please feel free and add: > > > > > > Reviewed-by: Sedat Dilek <sedat.dilek@xxxxxxxxx> > > > Tested-by: Sedat Dilek <sedat.dilek@xxxxxxxxx> > > > > > > Thanks. > > > > I collected all Reviewed-by and Tested-by. > > > > How to test scripts/mkcompile_h? There's probably a better way, but I do: $ rm include/generated/compile.h init/version.o $ make init/version.o $ cat include/generated/compile.h -Kees > > I did: > > $ cd /path/to/linux > > $ head -10 scripts/mkcompile_h > #!/bin/sh > # SPDX-License-Identifier: GPL-2.0 > > TARGET=$1 > ARCH=$2 > SMP=$3 > PREEMPT=$4 > PREEMPT_RT=$5 > CC=$6 > LD=$7 > > $ scripts/mkcompile_h include/generated/compile.h x86_64 SMP "" "" > clang-10 ld.lld-10 > UPD include/generated/compile.h > > $ cat include/generated/compile.h > /* This file is auto generated, version 1 */ > /* SMP */ > #define UTS_MACHINE "x86_64" > #define UTS_VERSION "#1 SMP Mon Apr 6 12:29:53 CEST 2020" > #define LINUX_COMPILE_BY "dileks" > #define LINUX_COMPILE_HOST "iniza" > #define LINUX_COMPILER "clang version 10.0.0-2, LLD 10.0.0" > > This is with clang-10 and ld.lld-10 from Debian/unstable: > > $ clang-10 -v > clang version 10.0.0-2 > Target: x86_64-pc-linux-gnu > Thread model: posix > InstalledDir: /usr/bin > Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/10 > Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/8 > Found candidate GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/9 > Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/10 > Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/8 > Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/9 > Selected GCC installation: /usr/bin/../lib/gcc/x86_64-linux-gnu/10 > Candidate multilib: .;@m64 > Candidate multilib: 32;@m32 > Candidate multilib: x32;@mx32 > Selected multilib: .;@m64 > > $ ld.lld-10 -v > LLD 10.0.0 (compatible with GNU linkers) > > Thanks. > > - sed@ - -- Kees Cook
