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@chromium.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Tested-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Fangrui Song <maskray@google.com>
Reviewed-by: Sedat Dilek <sedat.dilek@gmail.com>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Bug: 153484457
(cherry picked from commit 6f04f056df3c
https://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild.git
for-next)
[nd: commit 4b950bb9ac ("Kbuild: Handle PREEMPT_RT for version string and magic")
missing in 4.19, first landed in 5.4-rc1.
commit b79c6aa6a1 ("kbuild: remove unnecessary in-subshell execution")
missing in 4.19, first landed in 5.1-rc1.
]
Change-Id: Ifa5a98fe159392862e8d07a733c0f141fa9c7715
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
