わたなべです.

cygwin で bind はリンクしないように
とりあえず comment out してください.

--- ext/socket/extconf.rb.orig Fri Aug 13 14:37:50 1999 +++ ext/socket/extconf.rb Thu Aug 19 10:15:19 1999 @@ -9,6 +9,6 @@ when /cygwin/ - $LDFLAGS << " -L/usr/lib" if File.directory?("/usr/lib") - $CFLAGS << " -I/usr/include" +# $LDFLAGS << " -L/usr/lib" if File.directory?("/usr/lib") +# $CFLAGS << " -I/usr/include" test_func = "socket" - have_library("bind", "gethostbyaddr") +# have_library("bind", "gethostbyaddr") when /beos/