diff -up gnuradio-3.2.2/config/gr_lib64.m4.64bit gnuradio-3.2.2/config/gr_lib64.m4
--- gnuradio-3.2.2/config/gr_lib64.m4.64bit	2010-09-07 10:50:42.000000000 +0200
+++ gnuradio-3.2.2/config/gr_lib64.m4	2010-09-07 10:53:15.000000000 +0200
@@ -21,14 +21,14 @@ dnl 
 
 dnl GR_LIB64()
 dnl
-dnl Checks to see if we're on a x86_64 or powerpc64 machine, and if so, determine
+dnl Checks to see if we're on a x86_64, powerpc64, sparc64 or s390x machine, and if so, determine
 dnl if libdir should end in "64" or not.
 dnl
 dnl Sets gr_libdir_suffix to "" or "64" and calls AC_SUBST(gr_libdir_suffix)
 dnl May append "64" to libdir.
 dnl
 dnl The current heuristic is:
-dnl   if the host_cpu isn't x86_64 or powerpc64, then ""
+dnl   if the host_cpu isn't x86_64 or powerpc64 or sparc64 or s390x, then ""
 dnl   if the host_os isn't linux, then ""
 dnl   if we're cross-compiling, ask the linker, by way of the selected compiler
 dnl   if we're x86_64 and there's a /lib64 and it's not a symlink, then "64", else ""
@@ -47,7 +47,8 @@ AC_DEFUN([GR_LIB64],[
     *)      is_linux=no  ;;
   esac
 
-  if test "$is_linux" = no || test "$host_cpu" != "x86_64" && test "$host_cpu" != "powerpc64"; then
+  if test "$is_linux" = no || test "$host_cpu" != "x86_64" && test "$host_cpu" != "powerpc64" \
+	&& test "$host_cpu" != "sparc64" && test "$host_cpu" != "s390x"; then
     gr_libdir_suffix=""
   elif test "$cross_compiling" = yes; then
     _GR_LIB64_ASK_COMPILER