--- linuxsampler/trunk/configure.in	2008/09/15 16:58:10	1777
+++ linuxsampler/trunk/configure.in	2008/11/30 09:10:07	1794
@@ -62,7 +62,7 @@
 AC_MSG_CHECKING([whether x86 architecture])
 def_arch_x86=0
 case $target_cpu in
-  "i386" | "i486" | "i586" | "i686" | "i786")
+  "i386" | "i486" | "i586" | "i686" | "i786" | "x86_64")
     echo "yes"
     def_arch_x86=1;;
   *)
@@ -74,7 +74,7 @@
 # (only if the user did not provide one)
 CXX_CPU_SWITCH=
 if ! echo "X $CXXFLAGS " | grep -q -- " \(-march=\|-mcpu=\|-mtune=\|-arch=\)" ; then
-  if test "$def_arch_x86" = 1; then
+  if test "$def_arch_x86" = 1 -a "$target_cpu" != "x86_64"; then
     CXX_CPU_SWITCH="-march=$target_cpu"
   elif test "$target_cpu" = "ppc"; then
     CXX_CPU_SWITCH="-arch=$target_cpu"