[Bug-readline] can't install readline on os x 10.5

[Thomas Nelson]

I can't seem to install readline: here's the relevent output from make:

gcc -dynamic -arch_only `/usr/bin/arch` -install_name
/usr/local/lib/libreadline.5.2.dylib -current_version 5.2
-compatibility_version 5 -v -o libreadline.5.2.dylib readline.so
vi_mode.so funmap.so keymaps.so parens.so search.so rltty.so
complete.so bind.so isearch.so display.so signals.so util.so kill.so
undo.so macro.so input.so callback.so terminal.so text.so nls.so
misc.so xmalloc.so history.so histexpand.so histfile.so histsearch.so
shell.so mbutil.so tilde.so compat.so -lncurses
Using built-in specs.
Target: i386-apple-darwin9.1.0
Configured with: ./configure
Thread model: posix
gcc version 4.2.3
gcc: -compatibility_version only allowed with -dynamiclib
make[1]: *** [libreadline.5.2.dylib] Error 1
make: [shared] Error 2 (ignored)

Any help would be greatly appreciated.

Thanks,
Tom