fake:

package/rene/samba/samba.conf

@@ -29,7 +29,11 @@ var_append extraconfopt " " "--with-smbmount --with-automount \
 --with-syslog --with-configdir=$sysconfdir \
 --with-privatedir=$sysconfdir/private --with-codepagedir=$sysconfdir/codepages \
 --with-swatdir=$root/$prefix/share/swat --with-quotas --with-fhs \
---with-acl-support --with-libsmbclient --with-spinlocks"
+--with-acl-support --with-libsmbclient"
+
+if ! [ "$arch" = x86 -a "$ROCKCFG_X86_BITS" = "64" ] ; then
+	 var_append extraconfopt ' ' "--with-spinlocks"
+fi
 
 # pam support
 pkginstalled pam && var_append extraconfopt ' ' "--with-pam --with-pam_smbpass"