The patch below disable AVX completely. This is untested and might not work if I understand https://bugzilla.redhat.com/show_bug.cgi?id=1659852 correctly
-- KU Leuven Department of Computer Science Department of Materials Engineering Celestijnenlaan 200a 3001 Leuven, Belgium
Description: Disable use of AVX AVX is not required by x86-64-v2. Author: Martin Diehl <[email protected]> Forwarded: not-needed Last-Update: 2024-06-04 --- This patch header follows DEP-3: http://dep.debian.net/deps/dep3/ --- a/buildflags.mak +++ b/buildflags.mak @@ -98,40 +98,6 @@ BASECFLAGS +=-Wall $(WERROR) -# -# test if compiler supports 32B(AVX2)/64B(AVX512F) move instruction. -# -ifeq (${CC},icc) - ifeq ($(PSM_DISABLE_AVX2),) - MAVX2=-xATOM_SSE4.2 -DPSM_AVX512 - else - MAVX2=-march=core-avx-i - endif -else - ifeq ($(PSM_DISABLE_AVX2),) - MAVX2=-mavx2 - else - MAVX2=-mavx - endif -endif - -ifneq (icc,${CC}) - ifeq ($(PSM_DISABLE_AVX2),) - RET := $(shell echo "int main() {}" | ${CC} ${MAVX2} -E -dM -xc - 2>&1 | grep -q AVX2 ; echo $$?) - else - RET := $(shell echo "int main() {}" | ${CC} ${MAVX2} -E -dM -xc - 2>&1 | grep -q AVX ; echo $$?) - anerr := $(warning ***NOTE TO USER**** Disabling AVX2 will harm performance) - endif - - ifeq (0,${RET}) - BASECFLAGS += ${MAVX2} - else - anerr := $(error Compiler does not support ${MAVX2} ) - endif -else - BASECFLAGS += ${MAVX2} -endif - # This support is dynamic at runtime, so is OK to enable as long as compiler can generate # the code. ifneq (,${PSM_AVX512})
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