linux-kernel - [PATCH] x86/build: Raise the minimum LLVM version to 15.0.0

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Message-Id: <20250220-x86-bump-min-llvm-for-stackp-v1-1-ecb3c906e790@kernel.org>
Date: Thu, 20 Feb 2025 13:08:12 -0700
From: Nathan Chancellor <nathan@...nel.org>
To: Ingo Molnar <mingo@...nel.org>, x86@...nel.org
Cc: Nick Desaulniers <nick.desaulniers+lkml@...il.com>, 
 Bill Wendling <morbo@...gle.com>, Justin Stitt <justinstitt@...gle.com>, 
 Ard Biesheuvel <ardb@...nel.org>, Uros Bizjak <ubizjak@...il.com>, 
 Brian Gerst <brgerst@...il.com>, linux-kernel@...r.kernel.org, 
 llvm@...ts.linux.dev, Nathan Chancellor <nathan@...nel.org>
Subject: [PATCH] x86/build: Raise the minimum LLVM version to 15.0.0

In a similar vein as commit a3e8fe814ad1 ("x86/build: Raise the minimum
GCC version to 8.1"), bump the minimum supported version of LLVM for
building x86 kernels to 15.0.0, as that is the first version that has
support for '-mstack-protector-guard-symbol', which is used
unconditionally after commit 80d47defddc0 ("x86/stackprotector/64:
Convert to normal per-CPU variable"):

  clang-14: error: unknown argument: '-mstack-protector-guard-symbol=__ref_stack_chk_guard'

Fixes: 80d47defddc0 ("x86/stackprotector/64: Convert to normal per-CPU variable")
Link: https://github.com/llvm/llvm-project/commit/efbaad1c4a526e91b034e56386e98a9268cd87b2
Signed-off-by: Nathan Chancellor <nathan@...nel.org>
---
 scripts/min-tool-version.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/min-tool-version.sh b/scripts/min-tool-version.sh
index 06c4e410ecab..787868183b84 100755
--- a/scripts/min-tool-version.sh
+++ b/scripts/min-tool-version.sh
@@ -26,7 +26,7 @@ gcc)
 	fi
 	;;
 llvm)
-	if [ "$SRCARCH" = s390 ]; then
+	if [ "$SRCARCH" = s390 -o "$SRCARCH" = x86 ]; then
 		echo 15.0.0
 	elif [ "$SRCARCH" = loongarch ]; then
 		echo 18.0.0

---
base-commit: 929ce2d9f919967fe8edf7e840165e43612c2576
change-id: 20250220-x86-bump-min-llvm-for-stackp-9e358db476e2

Best regards,
-- 
Nathan Chancellor <nathan@...nel.org>