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x86/build: Drop unnecessary '-ffreestanding' addition to KBUILD_CFLAGS

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Now that the minimum supported version of LLVM for building the kernel
has been raised to 17.0.1, the addition of '-ffreestanding' to
KBUILD_CFLAGS for 32-bit x86 is unnecessary, as the linked LLVM bug is
resolved in all supported LLVM versions.

  16cb16e0d2 ("x86/build: Remove -ffreestanding on i386 with GCC")

intended to make the addition of '-ffreestanding' clang only but due to
a bug in the adjusted check from

  d70da12453 ("hardening: Enable i386 FORTIFY_SOURCE on Clang 16+")

it has been applied for all versions of GCC and clang < 16.0.0. There
are no known problems with removing this for GCC but if one surfaces, it
can be restored under a CONFIG_CC_IS_GCC block.

Link: https://patch.msgid.link/20260517-bump-minimum-supported-llvm-version-to-17-v2-11-b3b8cda46bdd@kernel.org
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
This commit is contained in:
Nathan Chancellor 2026-05-17 13:05:14 -10:00
parent 2a35c63c6b
commit 7b3281fcb4
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1 changed files with 0 additions and 5 deletions
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arch/x86/Makefile
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@ -124,11 +124,6 @@ ifeq ($(CONFIG_X86_32),y)
include $(srctree)/arch/x86/Makefile_32.cpu
KBUILD_CFLAGS += $(cflags-y)
ifneq ($(call clang-min-version, 160000),y)
# https://github.com/llvm/llvm-project/issues/53645
KBUILD_CFLAGS += -ffreestanding
endif
percpu_seg := fs
else
BITS := 64