problem when installing ng-spice

[ed_mccombs@…]

Mac OS 10.6.2 and all software updates Mac Pro 1) I did a port selfupdate 2) I did a port upgrade outdated ---> Updating the ports tree ---> Updating MacPorts base sources using rsync MacPorts base version 1.8.2 installed, MacPorts base version 1.8.2 downloaded. ---> MacPorts base is already the latest version 3) I reloaded all the Xcode components from the DVD options

When trying to install ng-spice, I get this: sudo port install ng-spice ---> Computing dependencies for ng-spice ---> Configuring ng-spice Error: Target org.macports.configure returned: configure failure: shell command " cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_science_ng-spice/work/ngspice-19" && ./configure --prefix=/opt/local --mandir=/opt/local/share/man --infodir=/opt/local/share/info --with-editline=yes --enable-x " returned error 1 Command output: checking for IceConnectionNumber in -lICE... yes checking for stdbool.h that conforms to C99... yes checking for _Bool... yes checking for size_t... yes checking for working alloca.h... yes checking for alloca... yes checking stdlib.h usability... yes checking stdlib.h presence... yes checking for stdlib.h... yes checking for GNU libc compatible malloc... yes checking for stdlib.h... (cached) yes checking for GNU libc compatible realloc... yes checking for dirent.h that defines DIR... yes checking for library containing opendir... none required checking whether closedir returns void... no checking sys/select.h usability... yes checking sys/select.h presence... yes checking for sys/select.h... yes checking sys/socket.h usability... yes checking sys/socket.h presence... yes checking for sys/socket.h... yes checking types of arguments for select... int,fd_set *,struct timeval * rm: conftest.dSYM: is a directory checking for function prototypes... yes checking whether setvbuf arguments are reversed... no checking for vprintf... yes checking for _doprnt... no checking if hardcoding of the X11 runtime library path is desired... no checking for main in -lXaw... no configure: error: Couldn't find Xaw library

Error: Status 1 encountered during processing. Before reporting a bug, first run the command again with the -d flag to get complete output.