SUPPORTS_AVX512 := $(shell echo | gcc -E -mavx512f - > /dev/null 2>&1 && echo "True" )
HARD_SWITCH_NOSIMD = -mno-mmx -mno-sse2 -mno-avx -mno-avx2
HARD_SWITCH_MMX = -mmmx -mno-sse2 -mno-avx -mno-avx2
-HARD_SWITCH_SSE2 = -mmmx -msse2 -mno-avx -mno-avx2
+HARD_SWITCH_SSE2 = -mmmx -msse2 -mno-avx -mno-avx2 -mstackrealign
HARD_SWITCH_AVX = -mmmx -msse2 -mavx -mno-avx2
HARD_SWITCH_AVX2 = -mmmx -msse2 -mavx -mavx2
HARD_SWITCH_AVX512 = -mmmx -msse2 -mavx -mavx2 -mavx512f