No -march=native, please.

Index: configure
--- configure.orig
+++ configure
@@ -9016,7 +9016,7 @@ rm -f core conftest.err conftest.$ac_objext conftest.b
             SIMD_FLAGS="-mfpu=neon -DHAVE_NEON"
           else
             # this part is a bit iffy,,,
-            CXXFLAGS="-march=native -mfpu=neon"
+            CXXFLAGS="-mfpu=neon"
             cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <arm_neon.h>
@@ -9037,7 +9037,7 @@ esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
             if test "x$mneon_ok" = "xyes"; then
-              SIMD_FLAGS="-march=native -mfpu=neon -DHAVE_NEON"
+              SIMD_FLAGS="-mfpu=neon -DHAVE_NEON"
             fi
           fi
           CXXFLAGS=$save_CXXFLAGS
@@ -9258,7 +9258,7 @@ fi
         if test "x$mneon_ok" = "xyes"; then
           SIMD_FLAGS="-mfpu=neon -DHAVE_NEON"
         else
-          CXXFLAGS="-march=native -mfpu=neon"
+          CXXFLAGS="-mfpu=neon"
           if test "$cross_compiling" = yes
 then :
   { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
@@ -9290,7 +9290,7 @@ esac
 fi
 
           if test "x$mneon_ok" = "xyes"; then
-            SIMD_FLAGS="-march=native -mfpu=neon -DHAVE_NEON"
+            SIMD_FLAGS="-mfpu=neon -DHAVE_NEON"
           fi
         fi
         CXXFLAGS=$save_CXXFLAGS
