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From 846915b6d07f53349de1e097b7143856619f34e0 Mon Sep 17 00:00:00 2001
From: Luca Stefani <luca.stefani.ge1@gmail.com>
Date: Tue, 4 Aug 2020 18:01:47 +0200
Subject: [PATCH 2/2] kbuild: Rollback required CLANG version to 10 for LTO
* ARM64 still requires CLANG 11 to fix https://github.com/ClangBuiltLinux/linux/issues/510
Signed-off-by: Luca Stefani <luca.stefani.ge1@gmail.com>
---
arch/Kconfig | 2 +-
arch/arm64/Kconfig | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/Kconfig b/arch/Kconfig
index 694bfdc2073f..54f6a55180ca 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -595,7 +595,7 @@ config LTO_NONE
config LTO_CLANG
bool "Clang's Link Time Optimization (EXPERIMENTAL)"
# https://github.com/ClangBuiltLinux/linux/issues/510
- depends on CC_IS_CLANG && CLANG_VERSION >= 110000 && LD_IS_LLD
+ depends on CC_IS_CLANG && CLANG_VERSION >= 100000 && LD_IS_LLD
depends on $(success,$(NM) --help | head -n 1 | grep -qi llvm)
depends on $(success,$(AR) --help | head -n 1 | grep -qi llvm)
depends on ARCH_SUPPORTS_LTO_CLANG
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index c9fb665b62b5..1883f42e341c 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -73,7 +73,7 @@ config ARM64
select ARCH_SUPPORTS_MEMORY_FAILURE
select ARCH_SUPPORTS_SHADOW_CALL_STACK if CC_HAVE_SHADOW_CALL_STACK
select ARCH_SUPPORTS_LTO_CLANG
- select ARCH_SUPPORTS_THINLTO
+ select ARCH_SUPPORTS_THINLTO if CLANG_VERSION >= 110000
select ARCH_SUPPORTS_ATOMIC_RMW
select ARCH_SUPPORTS_INT128 if CC_HAS_INT128 && (GCC_VERSION >= 50000 || CC_IS_CLANG)
select ARCH_SUPPORTS_NUMA_BALANCING
--
2.28.0
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