diff options
Diffstat (limited to 'arch/x86/Makefile.um')
| -rw-r--r-- | arch/x86/Makefile.um | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/arch/x86/Makefile.um b/arch/x86/Makefile.um index b3c1ae084180..2106a2bd152b 100644 --- a/arch/x86/Makefile.um +++ b/arch/x86/Makefile.um @@ -1,6 +1,17 @@ # SPDX-License-Identifier: GPL-2.0 core-y += arch/x86/crypto/ +# +# Disable SSE and other FP/SIMD instructions to match normal x86 +# This is required to work around issues in older LLVM versions, but breaks +# GCC versions < 11. See: +# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99652 +# +ifeq ($(CONFIG_CC_IS_CLANG),y) +KBUILD_CFLAGS += -mno-sse -mno-mmx -mno-sse2 -mno-3dnow -mno-avx +KBUILD_RUSTFLAGS += -Ctarget-feature=-sse,-sse2,-sse3,-ssse3,-sse4.1,-sse4.2,-avx,-avx2 +endif + ifeq ($(CONFIG_X86_32),y) START := 0x8048000 @@ -17,7 +28,7 @@ LDS_EXTRA := -Ui386 export LDS_EXTRA # First of all, tune CFLAGS for the specific CPU. This actually sets cflags-y. -include arch/x86/Makefile_32.cpu +include $(srctree)/arch/x86/Makefile_32.cpu # prevent gcc from keeping the stack 16 byte aligned. Taken from i386. cflags-y += $(call cc-option,-mpreferred-stack-boundary=2) |