octave - install failure

[sidhu_hs@…]

I have tried to install octave via macports. The installation fails when it reaches 'building arpack'. Please see terminal output:

Last login: Wed Mar 17 13:50:57 on console
harcharan-singh-sidhus-macbook-pro:~ sidhu_hs$ sudo port install octave
Password:
--->  Computing dependencies for octave
--->  Building arpack
Error: Target org.macports.build returned: shell command "cd /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_math_arpack/work/ARPACK &&  /usr/bin/ld -arch i386 -dynamic -dylib -single_module -dead_strip  -x -all_load -L. -L/opt/local/lib/gcc45/i386 -L/opt/local/lib/gcc45 -L/opt/local/lib  -dylib_install_name /opt/local/lib/libarpack.1.dylib  -current_version 1  -compatibility_version 1  libarpack.a -o libarpack.1.dylib -latlas -llapack -lgfortran -lSystem" returned error 1
Command output: ld: library not found for -lgfortran

Error: The following dependencies failed to build: arpack atlas gzip texinfo lzmautils curl curl-ca-bundle libidn openssl fftw-3 fftw-3-single ftgl doxygen coreutils graphviz ghostscript cairo libpixman xrender xorg-renderproto libpaper pango Xft2 glib2 urw-fonts xorg-libXaw groff xorg-libXmu gsed gawk gcc43 glpk hdf5-18 szip pcre qhull cmake qrupdate
Error: Status 1 encountered during processing.
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OS Version: Mac OS X 10.5.8 Xcode: 3.1.2 MacPorts: 1.8.2