Merge pull request #50 from bmwiedemann/sse2

Disable march=native for SSE2

configure

@@ -7708,7 +7708,7 @@ $as_echo "no" >&6; }
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether ${CXX} supports SSE2 intrinsics" >&5
 $as_echo_n "checking whether ${CXX} supports SSE2 intrinsics... " >&6; }
   save_CXXFLAGS=$CXXFLAGS
-  CXXFLAGS="-march=native"
+  CXXFLAGS="-msse2"
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <emmintrin.h>
@@ -7730,7 +7730,7 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
   { $as_echo "$as_me:${as_lineno-$LINENO}: result: $msse2_ok" >&5
 $as_echo "$msse2_ok" >&6; }
   if test "x$msse2_ok" = "xyes"; then
-    SIMD_FLAGS="-march=native -msse2 -DHAVE_SSE2"
+    SIMD_FLAGS="-msse2 -DHAVE_SSE2"
   fi
 else
   { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5

configure.ac

@@ -190,14 +190,14 @@ if test "x$with_no_sse2" = "xno"; then
   AC_MSG_RESULT(no)
   AC_MSG_CHECKING([whether ${CXX} supports SSE2 intrinsics])
   save_CXXFLAGS=$CXXFLAGS
-  CXXFLAGS="-march=native"
+  CXXFLAGS="-msse2"
   AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <emmintrin.h>]], [[__m128i n = _mm_set1_epi8(42);]])],
                     [msse2_ok=yes],
                     [msse2_ok=no])
   CXXFLAGS=$save_CXXFLAGS
   AC_MSG_RESULT($msse2_ok)
   if test "x$msse2_ok" = "xyes"; then
-    SIMD_FLAGS="-march=native -msse2 -DHAVE_SSE2"
+    SIMD_FLAGS="-msse2 -DHAVE_SSE2"
   fi
 else
   AC_MSG_RESULT(yes)