~$ cabal --version cabal-install version 1.18.0.5 using version 1.18.1.4 of the Cabal library ~$ ghc --version The Glorious Glasgow Haskell Compilation System, version 7.8.3 I got the following error. Does anybody know how to resolve it? Thanks. ~$ cabal install cabal-install Resolving dependencies... Configuring Cabal-1.22.3.0... Failed to install Cabal-1.22.3.0 Last 10 lines of the build log ( /Users/py/.cabal/logs/Cabal-1.22.3.0.log ): cabal: Error: some packages failed to install: Cabal-1.22.3.0 failed during the configure step. The exception was: user error (Undefined symbols for architecture x86_64: "_iconv", referenced from: _hs_iconv in libHSbase-4.7.0.1.a(iconv.o) (maybe you meant: _hs_iconv, _base_GHCziIOziEncodingziIconv_iconvEncodingzuloc1_info , _base_GHCziIOziEncodingziIconv_iconvEncoding9_info , _base_GHCziIOziEncodingziIconv_iconvEncoding9_closure , _base_GHCziIOziEncodingziIconv_iconvEncoding8_info , _base_GHCziIOziEncodingziIconv_iconvEncodingzuloc_closure , _base_GHCziIOziEncodingziIconv_iconvEncoding10_info , _base_GHCziIOziEncodingziIconv_iconvEncoding6_closure , _base_GHCziIOziEncodingziIconv_iconvEncoding10_closure , _base_GHCziIOziEncodingziIconv_iconvEncoding3_closure , _base_GHCziIOziEncodingziIconv_iconvEncoding7_info , _hs_iconv_close , _base_GHCziIOziEncodingziIconv_iconvEncodingzuloc1_closure , _base_GHCziIOziEncodingziIconv_iconvEncoding2_info , _base_GHCziIOziEncodingziIconv_iconvEncoding8_closure , _base_GHCziIOziEncodingziIconv_iconvEncoding3_info , _base_GHCziIOziEncodingziIconv_iconvEncoding2_closure , _base_GHCziIOziEncodingziIconv_iconvEncoding7_closure , _base_GHCziIOziEncodingziIconv_iconvEncodingzuloc_info , _base_GHCziIOziEncodingziIconv_iconvEncoding4_closure , _base_GHCziIOziEncodingziIconv_iconvEncoding6_info , _hs_iconv_open ) "_iconv_close", referenced from: _hs_iconv_close in libHSbase-4.7.0.1.a(iconv.o) (maybe you meant: _hs_iconv_close) "_iconv_open", referenced from: _hs_iconv_open in libHSbase-4.7.0.1.a(iconv.o) (maybe you meant: _hs_iconv_open) "_locale_charset", referenced from: _localeEncoding in libHSbase-4.7.0.1.a(PrelIOUtils.o) ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation) ) cabal-install-1.22.3.0 depends on Cabal-1.22.3.0 which failed to install. ~/ports$ gvim ~/.cabal/logs/ -- Regards, Peng