The patch titled
Subject: compiler-clang: add build check for clang 10.0.1
has been added to the -mm tree. Its filename is
compiler-clang-add-build-check-for-clang-1001.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/compiler-clang-add-build-check-for-clang-1001.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/compiler-clang-add-build-check-for-clang-1001.patch
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------------------------------------------------------
From: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
Subject: compiler-clang: add build check for clang 10.0.1
Patch series "set clang minimum version to 10.0.1", v3.
Adds a compile time #error to compiler-clang.h setting the effective
minimum supported version to clang 10.0.1. A separate patch has already
been picked up into the Documentation/ tree also confirming the version.
Next are a series of reverts. One for 32b arm is a partial revert.
Then Marco suggested fixes to KASAN docs.
Finally, improve the warning for GCC too as per Kees.
This patch (of 7):
During Plumbers 2020, we voted to just support the latest release of Clang
for now. Add a compile time check for this.
We plan to remove workarounds for older versions now, which will break in
subtle and not so subtle ways.
Link: https://lkml.kernel.org/r/20200902225911.209899-1-ndesaulniers@xxxxxxxxxx
Link: https://lkml.kernel.org/r/20200902225911.209899-2-ndesaulniers@xxxxxxxxxx
Link: https://github.com/ClangBuiltLinux/linux/issues/9
Link: https://github.com/ClangBuiltLinux/linux/issues/941
Signed-off-by: Nick Desaulniers <ndesaulniers@xxxxxxxxxx>
Suggested-by: Sedat Dilek <sedat.dilek@xxxxxxxxx>
Suggested-by: Nathan Chancellor <natechancellor@xxxxxxxxx>
Suggested-by: Kees Cook <keescook@xxxxxxxxxxxx>
Tested-by: Sedat Dilek <sedat.dilek@xxxxxxxxx>
Reviewed-by: Kees Cook <keescook@xxxxxxxxxxxx>
Reviewed-by: Miguel Ojeda <miguel.ojeda.sandonis@xxxxxxxxx>
Reviewed-by: Sedat Dilek <sedat.dilek@xxxxxxxxx>
Acked-by: Marco Elver <elver@xxxxxxxxxx>
Acked-by: Nathan Chancellor <natechancellor@xxxxxxxxx>
Acked-by: Sedat Dilek <sedat.dilek@xxxxxxxxx>
Cc: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
Cc: Fangrui Song <maskray@xxxxxxxxxx>
Cc: Masahiro Yamada <masahiroy@xxxxxxxxxx>
Cc: Daniel Borkmann <daniel@xxxxxxxxxxxxx>
Cc: Alexei Starovoitov <ast@xxxxxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Cc: Vincenzo Frascino <vincenzo.frascino@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/compiler-clang.h | 8 ++++++++
1 file changed, 8 insertions(+)
--- a/include/linux/compiler-clang.h~compiler-clang-add-build-check-for-clang-1001
+++ a/include/linux/compiler-clang.h
@@ -3,6 +3,14 @@
#error "Please don't include <linux/compiler-clang.h> directly, include <linux/compiler.h> instead."
#endif
+#define CLANG_VERSION (__clang_major__ * 10000 \
+ + __clang_minor__ * 100 \
+ + __clang_patchlevel__)
+
+#if CLANG_VERSION < 100001
+# error Sorry, your version of Clang is too old - please use 10.0.1 or newer.
+#endif
+
/* Compiler specific definitions for Clang compiler */
/* same as gcc, this was present in clang-2.6 so we can assume it works
_
Patches currently in -mm which might be from ndesaulniers@xxxxxxxxxx are
maintainers-add-llvm-maintainers.patch
lib-stringc-implement-stpcpy.patch
compiler-clang-add-build-check-for-clang-1001.patch
revert-kbuild-disable-clangs-default-use-of-fmerge-all-constants.patch
revert-arm64-bti-require-clang-=-1001-for-in-kernel-bti-support.patch
revert-arm64-vdso-fix-compilation-with-clang-older-than-8.patch
partially-revert-arm-8905-1-emit-__gnu_mcount_nc-when-using-clang-1000-or-newer.patch
compiler-gcc-improve-version-error.patch
