Error of `cabal install cabal-install` on Mac OS X 10.9.4

[Peng Yu]

On Sat, Aug 30, 2014 at 3:41 PM, Brandon Allbery <allbery.b at gmail.com> wrote:
> On Sat, Aug 30, 2014 at 4:33 PM, Peng Yu <pengyu.ut at gmail.com> wrote:
>>
>> Undefined symbols for architecture x86_64:
>> "_iconv", referenced from:
>> _hs_iconv in libHSbase-4.7.0.1.a(iconv.o)
>
>
> You are mixing stuff built against the system iconv with stuff built against
> either MacPorts or Homebrew. This won't work.

I have MacPorts installed. But how to figure out what in MacPorts is
in conflict from the one from Haskell Mac OS X installer?

-- 
Regards,
Peng