plab@book~$ ldd /home/plab/.gem/ruby/extensions/x86_64-cygwin/psych-2.0.13/psych.so
        ntdll.dll => /cygdrive/c/Windows/SYSTEM32/ntdll.dll (0x7ffcc8350000)
        KERNEL32.DLL => /cygdrive/c/Windows/system32/KERNEL32.DLL (0x7ffcc6b00000)
        KERNELBASE.dll => /cygdrive/c/Windows/system32/KERNELBASE.dll (0x7ffcc5620000)
        ??? => ??? (0x50eed0000)
        ??? => ??? (0x180040000)