--- configure.ac.orig	2023-07-30 14:56:15 UTC
+++ configure.ac
@@ -109,8 +109,8 @@ AS_IF(
              ]
        )
 
-       AC_SUBST([MFLAGS], ["-mfpmath=sse -msse2"])
-       AC_SUBST([AVX2FLAGS], ["-mavx2 -mfma -mtune=haswell"])
+       AC_SUBST([MFLAGS], [""])
+       AC_SUBST([AVX2FLAGS], [""])
       ]
 )