From: Kees Cook <kees@kernel.org>
Date: Sat, 8 Mar 2025 04:29:25 +0000 (-0800)
Subject: x86/build: Remove -ffreestanding on i386 with GCC
X-Git-Tag: v6.15-rc1~233^2~2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=16cb16e0d28501f6eef7071675f1ffbceea8dd0d;p=thirdparty%2Fkernel%2Flinux.git

x86/build: Remove -ffreestanding on i386 with GCC

The use of -ffreestanding is a leftover that is only needed for certain
versions of Clang. Adjust this to be Clang-only. A later patch will make
this a versioned check.

Acked-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Link: https://lore.kernel.org/r/20250308042929.1753543-1-kees@kernel.org
Signed-off-by: Kees Cook <kees@kernel.org>
---

diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index 5b773b34768d1..4c136bcaff861 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -137,8 +137,10 @@ ifeq ($(CONFIG_X86_32),y)
         include $(srctree)/arch/x86/Makefile_32.cpu
         KBUILD_CFLAGS += $(cflags-y)
 
-        # temporary until string.h is fixed
+    ifeq ($(CONFIG_CC_IS_CLANG),y)
+        # https://github.com/llvm/llvm-project/issues/53645
         KBUILD_CFLAGS += -ffreestanding
+    endif
 
     ifeq ($(CONFIG_STACKPROTECTOR),y)
         ifeq ($(CONFIG_SMP),y)